0001514416-23-000151 | 10-Q | XBRL Viewer

Fair Value Measurements

9 Months Ended

Sep. 30, 2023

3. Fair Value Measurements

The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. The hierarchy requires use of observable inputs when available, and to minimize the use of unobservable inputs when determining fair value. The three tiers are defined as follows:

•Level 1. Observable inputs based on unadjusted quoted prices in active markets for identical assets or liabilities;

•Level 2. Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and

•Level 3. Unobservable inputs for which there is little or no market data, which requires the Company to develop its own assumptions.

A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate fair value as of September 30, 2023 and December 31, 2022 because of the relatively short duration of these instruments. Marketable securities consist of time deposits, corporate debt securities, U.S. treasury securities, and commercial paper not otherwise classified as cash equivalents. All marketable securities are considered to be available-for-sale and are recorded at their estimated fair values. Unrealized gains and losses for available-for-sale securities are recorded in accumulated other comprehensive loss.

The Company evaluated its financial assets and liabilities subject to fair value measurements on a recurring basis to determine the appropriate level in which to classify them for each reporting period. The following tables

summarize the Company’s financial assets measured at fair value as of September 30, 2023 and December 31, 2022:


	Amortized cost or carrying value		Unrealized gains		Unrealized losses		Fair value measurements on a recurring basis September 30, 2023
							Level 1		Level 2		Level 3		Total

	(In thousands)
Financial assets:
Cash and cash equivalents:
Money market account	$	67,168	$	—	$	—	$	67,168	$	—	$	—	$	67,168





Commercial paper	5,470		—		—		5,470		—		—		5,470

Total included in cash and cash equivalents	72,638		—		—		72,638		—		—		72,638
Marketable securities:
Time deposits	20,000		—		—		20,000		—		—		20,000

Corporate debt securities	265		1		—		—		266		—		266
Commercial paper	11,169		310		—		11,479		—		—		11,479
Total marketable securities	31,434		311		—		31,479		266		—		31,745



Total financial assets	$	104,072	$	311	$	—	$	104,117	$	266	$	—	$	104,383


	Amortized cost or carrying value		Unrealized gains		Unrealized losses		Fair value measurements on a recurring basis December 31, 2022
							Level 1		Level 2		Level 3		Total

	(In thousands)
Financial assets:
Cash and cash equivalents:
Money market account	$	36,728	$	—	$	—	$	36,728	$	—	$	—	$	36,728





Commercial paper	28,254		—		—		28,254		—		—		28,254

Total included in cash and cash equivalents	64,982		—		—		64,982		—		—		64,982
Marketable securities:
Time deposits	6,645		—		(15)		6,630		—		—		6,630
U.S. treasury securities	14,718		74		—		14,792		—		—		14,792
Corporate debt securities	23,412		—		(97)		—		23,315		—		23,315
Commercial paper	26,142		352		—		26,494		—		—		26,494
Total marketable securities	70,917		426		(112)		47,916		23,315		—		71,231



Total financial assets	$	135,899	$	426	$	(112)	$	112,898	$	23,315	$	—	$	136,213

The Company classifies its marketable securities as current assets as they are available for current operating needs. The following table summarizes the contractual maturities of marketable securities as of September 30, 2023:


	Amortized cost		Aggregate fair value

	(In thousands)
Financial assets:
Less than one year	$	31,434	$	31,745

Total	$	31,434	$	31,745

As of September 30, 2023, the marketable securities were in an unrealized gain position. The Company has determined that (i) it does not have the intent to sell any of these investments and (ii) it is not more likely than not that it will be required to sell any of these investments before recovery of the entire amortized cost basis. As of September 30, 2023, the Company anticipates that it will recover the entire amortized cost basis of its marketable securities before maturity.

During the three and nine months ended September 30, 2023, there were $18.9 million and $61.8 million in maturities of marketable securities, respectively. There were no proceeds from sales of marketable securities for the three months ended September 30, 2023 and $38.3 million for the nine months ended September 30, 2023. There were $33.1 million in maturities from marketable securities for the three and nine months ended September 30, 2022. The Company determines realized gains and losses on sale of marketable securities using the specific identification method and records such gains and losses in other income (expense), net on the condensed consolidated statements of operations. Interest earned on marketable securities was $0.6 million and $1.4 million for the three and nine months ended September 30, 2023, respectively, and $0.4 million and $0.6 million for the three and nine months ended September 30, 2022, respectively. The interest is recorded in other income (expense), net, on the accompanying condensed consolidated statements of operations.

As of September 30, 2023, the fair value of the 2026 Convertible Notes and 2028 Convertible Notes, as further described in Note 8, “Debt,” to these condensed consolidated financial statements, was approximately $137.7 million and $162.5 million, respectively. As of December 31, 2022, the fair value of the 2026 Convertible Notes and the 2028 Convertible Notes was approximately $180.9 million and $156.5 million, respectively. The fair value was determined based on the closing price for the Convertible Notes on the last trading day of the reporting period and is considered as Level 2 in the fair value hierarchy.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Debt - Schedule of Debt (Details) - Convertible notes - USD ($)	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2021	Feb. 28, 2020
Debt Instrument [Line Items]
Total net carrying amount	$ 418,042,000		$ 480,546,000
2026 Convertible Notes:
Debt Instrument [Line Items]
Principal	175,000,000	$ 175,000,000	240,000,000		$ 400,000,000
Unamortized debt issuance costs	(2,108,000)		(3,805,000)
Total net carrying amount	172,892,000		236,195,000
2028 Convertible Notes:
Debt Instrument [Line Items]
Principal	250,000,000		250,000,000	$ 250,000,000
Unamortized debt issuance costs	(4,850,000)		(5,649,000)
Total net carrying amount	$ 245,150,000		$ 244,351,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

Property, Plant and Equipment - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total cost	$ 264,215	$ 171,798
Less—accumulated depreciation	(87,435)	(72,045)
Total property, plant and equipment, net	176,780	99,753
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total cost	$ 17,204	16,494
Property and equipment, useful life	5 years
Computer and office equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 16,215	14,160
Telecommunications equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 79,925	80,251
Telecommunications equipment \| Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	7 years
Telecommunications equipment \| Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total cost	$ 79,683	6,410
Leasehold improvements \| Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Leasehold improvements \| Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Software
Property, Plant and Equipment [Line Items]
Total cost	$ 10,822	7,051
Property and equipment, useful life	3 years
Internal-use software development
Property, Plant and Equipment [Line Items]
Total cost	$ 31,139	23,677
Property and equipment, useful life	4 years
Automobile
Property, Plant and Equipment [Line Items]
Total cost	$ 526	665
Property and equipment, useful life	3 years
Land
Property, Plant and Equipment [Line Items]
Total cost	$ 27,636	23,090
Land Improvements
Property, Plant and Equipment [Line Items]
Total cost	$ 1,065	$ 0
Property and equipment, useful life	20 years
Computer hardware and software \| Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Computer hardware and software \| Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	2 years

Fair Value Measurements - Contractual Maturities of Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized cost
Less than one year	$ 31,434
Total	31,434	$ 70,917
Aggregate fair value
Less than one year	31,745
Total	$ 31,745

Leases

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Leases

5. Leases

The Company primarily leases facilities for office space under non-cancelable operating leases for its U.S. and international locations. As of September 30, 2023, non-cancelable leases expire on various dates between 2023 and 2043, some of which include options to extend the leases for up to 20 years.

The components of lease expense recorded in the condensed consolidated statements of operations were as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Operating lease cost	$	5,311	$	1,809	$	8,798	$	6,037





Sublease income	—		(14)		—		(206)
Total net lease cost	$	5,311	$	1,795	$	8,798	$	5,831

Other supplemental information related to operating leases were as follows:


	Nine months ended September 30,
		2023		2022

		(In thousands)








Weighted average remaining lease term (in years)		19.33		2.28



Weighted average discount rate		8.73	%	4.61	%

Maturities of operating lease liabilities were as follows:


	As of September 30,
	2023


	(In thousands)

2023 (remaining)	$	5,029
2024	23,544
2025	22,904
2026	22,365
2027	22,119

Thereafter	401,269
Total lease payments	497,230
Less: imputed interest	(269,750)

Total lease obligations	227,480
Less: current obligations	(4,766)
Long-term lease obligations	$	222,714

New Corporate Headquarters

On August 1, 2023, the Company commenced a lease for a new corporate headquarters in Raleigh, North Carolina. The lease term will continue for a period of twenty (20) years (the “Initial Term”). The Company has the option to renew the Initial Term for two ten-year periods at a rental rate equal to 100% of the then-prevailing market

rental rate for comparable buildings in the Raleigh, North Carolina, market. The Company relocated its corporate headquarters to the leased property during the third quarter of 2023.

Upon commencement of the lease, the Company recognized right-of-use (“ROU”) assets of $156.0 million and operating lease liabilities of $223.1 million. The operating lease liabilities include $67.8 million of incentives provided by the landlord throughout development of the new corporate headquarters. Assets obtained through lease incentives are reported in property, plant and equipment, net, on the condensed consolidated balance sheets. Total lease payments over the Initial Term will be approximately $495.7 million. The Company also has recorded $2.5 million in security deposits and $1.0 million in escrow deposits to fund additional improvements. Deposits are reported as a component of other long-term assets on the Company’s condensed consolidated balance sheets.

Debt - 2026 Convertible Notes (Details)	1 Months Ended		3 Months Ended		9 Months Ended
Debt - 2026 Convertible Notes (Details)	Mar. 31, 2023 USD ($)	Feb. 28, 2020 USD ($) $ / shares	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) $ / shares	Nov. 30, 2022 USD ($)	Mar. 31, 2021 $ / shares
Debt Instrument [Line Items]
Net gain on extinguishment of debt			$ 0	$ 0	$ 12,767,000	$ 0
Class A voting common stock
Debt Instrument [Line Items]
Common stock, par value (in usd per share) \| $ / shares		$ 0.001	$ 0.001		$ 0.001		$ 0.001		$ 0.001
2026 Convertible Notes:
Debt Instrument [Line Items]
Cash redemption price (as a percent)					100.00%
2026 Convertible Notes: \| Convertible notes
Debt Instrument [Line Items]
Principal amount	$ 175,000,000	$ 400,000,000	$ 175,000,000		$ 175,000,000		$ 240,000,000
Stated rate (as a percent)		0.25%
Total net proceeds		$ 344,700,000
Effective interest rate (as a percent)		0.509%
Conversion price (in usd per share) \| $ / shares		$ 91.03
Repurchased face amount	65,000,000							$ 160,000,000
Repayments of debt	$ 51,300,000
Net gain on extinguishment of debt					$ 12,800,000
2026 Convertible Notes: \| Convertible notes \| Class A voting common stock
Debt Instrument [Line Items]
Conversion ratio		0.0109857			0.0109857	0.0109857

Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K, filed with the SEC on February 23, 2023. The condensed consolidated balance sheet as of December 31, 2022, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures, including certain notes required by GAAP on an annual reporting basis. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2023 or any future period. Principles of Consolidation The condensed consolidated financial statements include the accounts of Bandwidth Inc. and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates The preparation of the Company’s condensed consolidated financial statements in conformity with GAAP requires the Company to make estimates and judgments that affect the amounts reported in these financial statements and accompanying notes. These estimates in the condensed consolidated financial statements include, but are not limited to, allowance for doubtful accounts, reserve for expected credit losses, reserve for sales credits, recoverability of long lived and intangible assets, fair value of acquired intangible assets and goodwill, discount rates used in the valuation of right-of-use assets and lease liabilities, the fair value of the liability of the Company’s Convertible Notes (as defined herein), estimated period of benefit, valuation allowances on deferred tax assets, certain accrued expenses and contingencies, economic and demographic actuarial assumptions related to pension and other postretirement benefit costs and liabilities. Although the Company believes that the estimates it uses are reasonable, due to the inherent uncertainty involved in making these estimates, actual results reported in future periods could differ from those estimates. Marketable Securities The Company classifies marketable securities as available-for-sale at the time of purchase and reevaluates such classification as of each balance sheet date. The Company may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, the Company classifies investments with maturities greater than 90 days as marketable securities in the accompanying condensed consolidated balance sheets. The Company evaluates its investments to assess whether the amortized cost basis is in excess of estimated fair value and determines what amount of that difference, if any, is caused by expected credit losses. Allowances for credit losses are recognized as a charge in other income (expense), net on the condensed consolidated statements of operations, and any remaining unrealized losses are included in accumulated other comprehensive loss on the condensed consolidated balance sheets. Due to the nature and investment grade of the Company’s marketable securities, there were no credit losses recorded for the three and nine months ended September 30, 2023. There have been no impairment charges for any unrealized losses during the period. Accounts Receivable and Current Expected Credit Losses Accounts receivable are stated at realizable value, net of allowances, which includes an allowance for doubtful accounts and a reserve for expected credit losses. The allowance for doubtful accounts is based on management’s assessment of the collectability of its customer accounts. The Company regularly reviews the composition of the accounts receivable aging, historical bad debts, changes in payment patterns, customer creditworthiness, current economic trends, and reasonable and supportable forecasts about the future. Relevant risk characteristics include customer size and historical loss patterns. Management has evaluated the expected credit losses related to trade accounts receivable and determined that an allowance of approximately $1.3 million and $1.2 million for uncollectible accounts and customer balances that are disputed was required as of September 30, 2023 and December 31, 2022, respectively. Refer to Note 4, “Financial Statement Components” to these condensed consolidated financial statements, for a rollforward of the components of the allowances for the three and nine months ended September 30, 2023 and 2022. The Company includes unbilled receivables in its accounts receivable balance. Generally, these receivables represent earned revenue from services provided to customers, which will be billed in the next billing cycle. All amounts are considered collectible and billable. As of September 30, 2023 and December 31, 2022, unbilled receivables were $39.7 million and $33.9 million, respectively. Concentration of Credit Risk Financial instruments that are exposed to concentration of credit risk consist primarily of cash and cash equivalents, marketable securities and trade accounts receivable. The Company maintains its cash, cash equivalents and marketable securities with high credit-quality financial institutions. Certain balances held by such financial institutions exceed insured limits. With regard to customers, credit evaluation and account monitoring procedures are used to minimize the risk of loss. The Company believes that no additional credit risk beyond amounts provided for by the allowance for doubtful accounts are inherent in accounts receivable. As of September 30, 2023 and December 31, 2022, no individual customer represented more than 10% of the Company’s accounts receivable, net of allowance for doubtful accounts. For the three and nine months ended September 30, 2023 and 2022, no individual customer represented more than 10% of the Company’s revenue. Business Interruption Insurance Recovery Beginning in September 2021, the Company’s communications network was subjected to a distributed denial of service attack (the “DDoS Attack”) that caused intermittent communications services disruptions affecting certain of its markets and customers. During the period of the DDoS Attack, the Company maintained certain insurance coverage, including business interruption insurance, intended to cover such circumstances. In June 2023, the Company resolved its claim with an insurer, pursuant to which the Company was entitled to receive $4.0 million in proceeds from business interruption insurance, which was recorded within gain on business interruption insurance recoveries on the Company’s condensed consolidated statements of operations in the nine months ended September 30, 2023. The proceeds were received in full in July 2023. Recent Accounting Pronouncements Not Yet Adopted There were no recent accounting pronouncements not yet adopted during the three and nine months ended September 30, 2023 that were significant to the Company.

Financial Statement Components - Schedule of Accounts Receivable, net of Allowances (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial Statement Components [Abstract]
Trade accounts receivable	$ 36,477	$ 40,332
Unbilled accounts receivable	39,743	33,863
Allowance for doubtful accounts and reserve for expected credit losses	(1,265)	(1,191)
Other accounts receivable	91	1,461
Total accounts receivable, net	$ 75,046	$ 74,465

Condensed Consolidated Statements of Changes in Stockholders’ Equity - USD ($) $ in Thousands	Total	Adjustment to opening retained earnings due to adoption of ASU 2020-06	Class A voting common stock	Class B voting common stock	Common stock Class A voting common stock	Common stock Class B voting common stock	Additional paid-in capital	Additional paid-in capital Adjustment to opening retained earnings due to adoption of ASU 2020-06	Accumulated other comprehensive income (loss)	Accumulated deficit	Accumulated deficit Adjustment to opening retained earnings due to adoption of ASU 2020-06
Beginning balance (in shares) at Dec. 31, 2021					23,177,988	1,965,170
Beginning balance at Dec. 31, 2021	$ 412,595	$ (147,498)			$ 23	$ 2	$ 502,477	$ (156,248)	$ (13,040)	$ (76,867)	$ 8,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)					16,095
Exercises of vested stock options	125						125
Vesting of restricted stock units (in shares)					144,977
Equity awards withheld for tax liability (in shares)					(30,029)
Equity awards withheld for tax liability	(1,751)						(1,751)
Foreign currency translation	(10,516)								(10,516)
Stock-based compensation	5,346						5,346
Net loss	(6,814)									(6,814)
Ending balance (in shares) at Mar. 31, 2022					23,309,031	1,965,170
Ending balance at Mar. 31, 2022	251,487				$ 23	$ 2	349,949		(23,556)	(74,931)
Beginning balance (in shares) at Dec. 31, 2021					23,177,988	1,965,170
Beginning balance at Dec. 31, 2021	412,595	$ (147,498)			$ 23	$ 2	502,477	$ (156,248)	(13,040)	(76,867)	$ 8,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(13,864)
Ending balance (in shares) at Sep. 30, 2022					23,358,203	1,965,170
Ending balance at Sep. 30, 2022	194,596				$ 23	$ 2	359,465		(82,913)	(81,981)
Beginning balance (in shares) at Mar. 31, 2022					23,309,031	1,965,170
Beginning balance at Mar. 31, 2022	251,487				$ 23	$ 2	349,949		(23,556)	(74,931)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)					4,287
Exercises of vested stock options	37						37
Vesting of restricted stock units (in shares)					28,351
Equity awards withheld for tax liability (in shares)					(7,005)
Equity awards withheld for tax liability	(145)						(145)
Unrealized loss on marketable securities	(338)								(338)
Foreign currency translation	(29,775)								(29,775)
Stock-based compensation	4,821						4,821
Net loss	(6,248)									(6,248)
Ending balance (in shares) at Jun. 30, 2022					23,334,664	1,965,170
Ending balance at Jun. 30, 2022	219,839				$ 23	$ 2	354,662		(53,669)	(81,179)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock units (in shares)					30,395
Equity awards withheld for tax liability (in shares)					(6,856)
Equity awards withheld for tax liability	(89)						(89)
Unrealized loss on marketable securities	458								458
Foreign currency translation	(29,702)								(29,702)
Stock-based compensation	4,892						4,892
Net loss	(802)									(802)
Ending balance (in shares) at Sep. 30, 2022					23,358,203	1,965,170
Ending balance at Sep. 30, 2022	194,596				$ 23	$ 2	359,465		(82,913)	(81,981)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)					86
Exercises of vested stock options	1						1
Vesting of restricted stock units (in shares)					27,511
Equity awards withheld for tax liability (in shares)					(6,800)
Equity awards withheld for tax liability	(149)						(149)
Unrealized loss on marketable securities	194								194
Foreign currency translation	38,138								38,138
Unrealized gain/loss on employee benefit pension plan	367								367
Stock-based compensation	5,596						5,596
Net loss	33,434									33,434
Ending balance (in shares) at Dec. 31, 2022			23,379,000	1,965,170	23,379,000	1,965,170
Ending balance at Dec. 31, 2022	272,177				$ 23	$ 2	364,913		(44,214)	(48,547)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)					22,975
Exercises of vested stock options	155						155
Vesting of restricted stock units (in shares)					171,950
Vesting of restricted stock units	1				$ 1
Equity awards withheld for tax liability (in shares)					(43,325)
Equity awards withheld for tax liability	(903)						(903)
Unrealized loss on marketable securities	72								72
Foreign currency translation	7,647								7,647
Stock-based compensation	6,649						6,649
Net loss	3,611									3,611
Ending balance (in shares) at Mar. 31, 2023					23,530,600	1,965,170
Ending balance at Mar. 31, 2023	289,409				$ 24	$ 2	370,814		(36,495)	(44,936)
Beginning balance (in shares) at Dec. 31, 2022			23,379,000	1,965,170	23,379,000	1,965,170
Beginning balance at Dec. 31, 2022	$ 272,177				$ 23	$ 2	364,913		(44,214)	(48,547)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)	61,349
Net loss	$ (5,409)
Ending balance (in shares) at Sep. 30, 2023			23,682,801	1,958,028	23,682,801	1,958,028
Ending balance at Sep. 30, 2023	279,987				$ 24	$ 2	383,013		(49,096)	(53,956)
Beginning balance (in shares) at Mar. 31, 2023					23,530,600	1,965,170
Beginning balance at Mar. 31, 2023	289,409				$ 24	$ 2	370,814		(36,495)	(44,936)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)					38,374
Exercises of vested stock options	259						259
Vesting of restricted stock units (in shares)					58,084
Equity awards withheld for tax liability (in shares)					(2,289)
Equity awards withheld for tax liability	(30)						(30)
Unrealized loss on marketable securities	54								54
Foreign currency translation	234								234
Stock-based compensation	5,866						5,866
Net loss	(3,890)									(3,890)
Ending balance (in shares) at Jun. 30, 2023					23,624,769	1,965,170
Ending balance at Jun. 30, 2023	291,902				$ 24	$ 2	376,909		(36,207)	(48,826)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock units (in shares)					51,132
Equity awards withheld for tax liability (in shares)					(242)
Equity awards withheld for tax liability	(3)						(3)
Shares converted (in shares)					7,142	(7,142)
Unrealized loss on marketable securities	(129)								(129)
Foreign currency translation	(12,760)								(12,760)
Stock-based compensation	6,107						6,107
Net loss	(5,130)									(5,130)
Ending balance (in shares) at Sep. 30, 2023			23,682,801	1,958,028	23,682,801	1,958,028
Ending balance at Sep. 30, 2023	$ 279,987				$ 24	$ 2	$ 383,013		$ (49,096)	$ (53,956)

Stock-Based Compensation - Restricted Stock Unit Activity (Details) - RSUs	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Number of awards outstanding
Beginning balance (in shares) \| shares	2,607,106
Granted (in shares) \| shares	360,927
Vested (in shares) \| shares	(281,166)
Forfeited or cancelled (in shares) \| shares	(138,912)
Ending balance (in shares) \| shares	2,547,955
Weighted-average grant date fair value (Per share)
Beginning balance (in usd per share) \| $ / shares	$ 32.33
Granted (in usd per share) \| $ / shares	13.16
Vested (in usd per share) \| $ / shares	50.45
Forfeited or cancelled (in usd per share) \| $ / shares	28.76
Ending balance (in usd per share) \| $ / shares	$ 27.81

Debt - Revolving Loan (Details)	Aug. 01, 2023 USD ($) qtr	Sep. 30, 2023 USD ($)	Mar. 14, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Outstanding unamortized loan fees		$ 700,000		$ 400,000
Silicon Valley Bank Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Line of credit			$ 0
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan
Debt Instrument [Line Items]
Borrowing capacity	$ 50,000,000
Accordion feature, increase limit	$ 25,000,000
Days prior to maturity date	91 days
Covenant, consecutive quarters \| qtr	4
Line of credit		0
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan \| Minimum
Debt Instrument [Line Items]
Unused portion of borrowing commitment	0.05%
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan \| Maximum
Debt Instrument [Line Items]
Unused portion of borrowing commitment	0.0625%
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Additional basis spread on variable rate	0.10%
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan \| Secured Overnight Financing Rate (SOFR) \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan \| Secured Overnight Financing Rate (SOFR) \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan \| Base rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Bank of America Credit Agreement \| Line of Credit \| Revolving Loan \| Base rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Bank of America Credit Agreement \| Line of Credit \| Credit commitments
Debt Instrument [Line Items]
Borrowing capacity	$ 15,000,000
Bank of America Credit Agreement \| Line of Credit \| Swing line
Debt Instrument [Line Items]
Borrowing capacity	$ 5,000,000
Prepaid expenses and other current assets
Debt Instrument [Line Items]
Outstanding unamortized loan fees		200,000		200,000
Other long-term assets
Debt Instrument [Line Items]
Outstanding unamortized loan fees		$ 500,000		$ 200,000

Financial Statement Components

9 Months Ended

Sep. 30, 2023

Financial Statement Components [Abstract]

Financial Statement Components

4. Financial Statement Components

Accounts receivable, net of allowances consist of the following:


	As of September 30,		As of December 31,
	2023		2022

	(In thousands)
Trade accounts receivable	$	36,477	$	40,332
Unbilled accounts receivable	39,743		33,863
Allowance for doubtful accounts and reserve for expected credit losses	(1,265)		(1,191)
Other accounts receivable	91		1,461
Total accounts receivable, net	$	75,046	$	74,465

Components of allowance for doubtful accounts and reserve for expected credit losses are as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Allowance for doubtful accounts:
Balance, beginning of period	$	(1,616)	$	(945)	$	(1,191)	$	(1,661)
Charged to bad debt expense, net of reversals	260		(117)		(465)		64
Deductions (1)	82		236		386		728
Impact of foreign currency translation	9		34		5		77



Balance, end of period	$	(1,265)	$	(792)	$	(1,265)	$	(792)

________________________

(1) Write-off of uncollectible accounts after all collection efforts have been exhausted.

Accrued expenses and other current liabilities consisted of the following:


	As of September 30,		As of December 31,
	2023		2022

	(In thousands)
Accrued expense	$	37,573	$	29,990
Accrued compensation and benefits	14,688		21,595
Accrued sales, use, VAT and telecommunications related taxes	7,489		7,799



Income tax payable	—		2,235
Other accrued expenses	702		958
Total accrued expenses and other current liabilities	$	60,452	$	62,577

Other liabilities consisted of the following:


	As of September 30,		As of December 31,
	2023		2022

	(In thousands)
Lease incentive	$	—	$	10,468
Other liabilities	620		708
Total other liabilities	$	620	$	11,176

Property, Plant and Equipment

9 Months Ended

Sep. 30, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

6. Property, Plant and Equipment

Property, plant and equipment, net consisted of the following:


	As of September 30,		As of December 31,		Useful Life
	2023		2022

	(In thousands)				(In years)
Furniture and fixtures	$	17,204	$	16,494	5
Computer and office equipment	16,215		14,160		2 to 10
Telecommunications equipment	79,925		80,251		5 to 7
Leasehold improvements	79,683		6,410		5 to 20
Software	10,822		7,051		3
Internal-use software development	31,139		23,677		4
Automobile	526		665		3
Land	27,636		23,090		Indefinite
Land Improvements	1,065		—		20
Total cost	264,215		171,798
Less—accumulated depreciation	(87,435)		(72,045)
Total property, plant and equipment, net	$	176,780	$	99,753

The Company capitalized $3.4 million and $8.4 million of software development costs for the three and nine months ended September 30, 2023, respectively, and $0.9 million and $2.1 million for the three and nine months ended September 30, 2022, respectively.

Amortization expense related to capitalized software development costs was $0.8 million and $2.2 million for the three and nine months ended September 30, 2023, respectively, and $0.6 million and $1.6 million for the three and nine months ended September 30, 2022, respectively. As of September 30, 2023, unamortized implementation costs related to cloud computing arrangements were $0.2 million, of which $0.1 million were included in prepaid expenses and other current assets and $0.1 million were included in other long-term assets.

The Company leases automobiles under leases accounted for as finance leases, which expire on various dates between 2024 and 2026. As of September 30, 2023, cost and accumulated depreciation of the assets under finance leases recorded by the Company were $0.5 million and $0.3 million, respectively.

The Company recognized depreciation expense, which includes amortization of capitalized software development costs, as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Cost of revenue	$	4,056	$	3,403	$	11,790	$	10,141
Research and development	1,199		610		2,461		1,767
Sales and marketing	905		346		1,486		1,027
General and administrative	487		302		990		913
Total depreciation expense	$	6,647	$	4,661	$	16,727	$	13,848

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Effective income tax rate (as a percent)	4.10%	53.50%	37.10%	7.70%
Income (loss) before income taxes	$ (5,349)	$ (1,725)	$ (8,603)	$ (15,025)

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A voting common stock
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	23,682,801	23,379,000
Common stock, shares outstanding (in shares)	23,682,801	23,379,000
Class B voting common stock
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	1,958,028	1,965,170
Common stock, shares outstanding (in shares)	1,958,028	1,965,170

Debt (Tables)

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Schedule of Net Carrying Amount of Liability and Equity Component of Notes

The net carrying amount of the liability components of the Convertible Notes were as follows:


	As of September 30,		As of December 31,
	2023		2022

2026 Convertible Notes:	(In thousands)
Principal	$	175,000	$	240,000

Unamortized debt issuance costs	(2,108)		(3,805)
2026 Convertible Notes net carrying amount	172,892		236,195

2028 Convertible Notes:
Principal	250,000		250,000

Unamortized debt issuance costs	(4,850)		(5,649)
2028 Convertible Notes net carrying amount	245,150		244,351
Total net carrying amount	$	418,042	$	480,546

Schedule of Interest Income and Interest Expense Disclosure

The following table sets forth the interest expense recognized related to the Convertible Notes:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

2026 Convertible Notes:	(In thousands)
Contractual interest expense	$	109	$	250	$	356	$	750

Amortization of debt issuance costs	217		497		723		1,488
Total interest expense related to the 2026 Convertible Notes	326		747		1,079		2,238

2028 Convertible Notes:
Contractual interest expense	313		313		939		939

Amortization of debt issuance costs	267		266		797		796
Total interest expense related to the 2028 Convertible Notes	580		579		1,736		1,735
Total interest expense	$	906	$	1,326	$	2,815	$	3,973

Schedule of Capped Call Transactions

The following table sets forth key terms and costs incurred for the Capped Calls related to the Convertible Notes:


	2026 Convertible Notes		2028 Convertible Notes

	(In thousands, except share and per share amounts)
Initial approximate strike price per share, subject to certain adjustments	$	91.03	$	179.27
Initial cap price per share, subject to certain adjustments	$	137.40	$	260.76
Net costs incurred	$	43,320	$	25,500
Class A common stock covered, subject to anti-dilution adjustments	4,394,276		1,394,525

Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following summarizes the stock option activity for the nine months ended September 30, 2023:


	Number of options outstanding	Weighted- average exercise price (Per share)		Weighted- average remaining contract life (In years)	Aggregate intrinsic value (In thousands)
Outstanding as of December 31, 2022	159,741	$	10.42	2.57	$	2,001
Granted	—	—
Exercised	(61,349)	6.74
Forfeited or cancelled	(287)	9.16
Outstanding as of September 30, 2023	98,105	$	12.73	3.22	$	116

Options vested and exercisable at September 30, 2023	98,105	$	12.73	3.22	$	116
Options vested and expected to vest as of September 30, 2023	98,105	$	12.73	3.22	$	116

Schedule of Restricted Stock Unit Activity

The following summarizes the restricted stock unit (“RSU”) activity for the nine months ended September 30, 2023:


	Number of awards outstanding	Weighted-average grant date fair value (Per share)
Nonvested RSUs as of December 31, 2022	2,607,106	$	32.33
Granted	360,927	13.16
Vested	(281,166)	50.45
Forfeited or cancelled	(138,912)	28.76
Nonvested RSUs as of September 30, 2023	2,547,955	$	27.81

Schedule of Stock-Based Compensation Expense

The Company recognized total stock-based compensation expense as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Cost of revenue	$	182	$	93	$	578	$	283
Research and development	2,822		1,767		9,278		5,298
Sales and marketing	1,160		593		3,825		2,219
General and administrative	2,778		2,439		8,644		7,259
Total	$	6,942	$	4,892	$	22,325	$	15,059

Basic and Diluted Loss per Common Share - Components of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net loss attributable to common stockholders	$ (5,130)	$ (802)	$ (5,409)	$ (13,864)
Net loss per share, basic (in usd per share)	$ (0.20)	$ (0.03)	$ (0.21)	$ (0.55)
Net loss per share, diluted (in usd per share)	$ (0.20)	$ (0.03)	$ (0.21)	$ (0.55)
Weighted average number of common shares outstanding, basic (in shares)	25,613,441	25,304,057	25,539,642	25,268,216
Weighted average number of common shares outstanding, diluted (in shares)	25,613,441	25,304,057	25,539,642	25,268,216

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482635/260-10-55-15

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480175/815-40-65-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480175/815-40-65-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-11

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-11

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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+ Details

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net loss	$ (5,409)	$ (13,864)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	29,687	26,866
Non-cash reduction to the right-of-use asset	5,227	5,308
Amortization of debt discount and issuance costs	1,995	2,343
Stock-based compensation	22,325	15,059
Deferred taxes and other	(5,902)	(5,496)
Net gain on extinguishment of debt	(12,767)	0
Changes in operating assets and liabilities:
Accounts receivable, net of allowances	(654)	(18,311)
Prepaid expenses and other assets	2,102	(13,389)
Accounts payable	4,164	14,305
Accrued expenses and other liabilities	(13,031)	17,142
Operating right-of-use liability	(8,004)	(5,623)
Net cash provided by operating activities	19,733	24,340
Cash flows from investing activities
Purchase of property, plant and equipment	(5,287)	(18,669)
Deposits for construction in progress	0	(14,545)
Capitalized software development costs	(8,384)	(2,121)
Purchase of marketable securities	(60,625)	(178,153)
Proceeds from sales and maturities of marketable securities	100,109	33,102
Proceeds from sale of business	1,070	0
Net cash provided by (used in) investing activities	26,883	(180,386)
Cash flows from financing activities
Payments on finance leases	(124)	(162)
Net cash paid for debt extinguishment	(51,259)	0
Payment of debt issuance costs	(696)	(553)
Proceeds from exercises of stock options	413	162
Value of equity awards withheld for tax liabilities	(1,056)	(2,047)
Net cash used in financing activities	(52,722)	(2,600)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(887)	(6,341)
Net decrease in cash, cash equivalents, and restricted cash	(6,993)	(164,987)
Cash, cash equivalents, and restricted cash, beginning of period	114,622	332,289
Cash, cash equivalents, and restricted cash, end of period	107,629	167,302
Reconciliation of cash, cash equivalents, and restricted cash, end of period
Cash and cash equivalents	107,373	166,384
Restricted cash included in prepaid expenses and other current assets	256	918
Total cash, cash equivalents, and restricted cash, end of period	107,629	167,302
Supplemental disclosure of cash flow information
Cash (received from) paid for interest	(814)	1,328
Cash paid for taxes, net	5,688	899
Right-of-use assets obtained in exchange for new operating lease liabilities	155,588	3,322
Supplemental disclosure of noncash investing and financing activities
Purchase of property, plant and equipment, accrued but not paid	3,825	2,133
Purchase of property and equipment through lease incentive	57,329	3,807
Purchase of property and equipment through use of escrow deposits	$ 20,674	$ 0

Geographic Information

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Geographic Information

9. Geographic Information

The Company generates its revenue primarily in North America. Revenue by geographic area is detailed in the table below, which is apportioned based on the destination of the service:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
North America	$	130,571	$	124,913	$	370,737	$	350,281
Rest of World	21,442		23,412		64,994		65,897
Total	$	152,013	$	148,325	$	435,731	$	416,178

During the three months ended March 31, 2023, the Company changed its methodology for apportioning the revenue by geographic area, from basing the revenue on the customer billing address to basing the revenue on the destination of the service, in order to provide a more transparent metric and to be consistent with other information provided publicly. Accordingly, all periods presented have been conformed to the updated methodology.

The Company’s long-lived assets were primarily held in North America as of September 30, 2023 and December 31, 2022. As of September 30, 2023 and December 31, 2022, long-lived assets held outside of North America were $6.7 million and $10.8 million, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Geographic Information (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of Revenue by Geographical Area

The Company generates its revenue primarily in North America. Revenue by geographic area is detailed in the table below, which is apportioned based on the destination of the service:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
North America	$	130,571	$	124,913	$	370,737	$	350,281
Rest of World	21,442		23,412		64,994		65,897
Total	$	152,013	$	148,325	$	435,731	$	416,178

Basic and Diluted Loss per Common Share - Schedule of Antidilutive Common Share Equivalents Excluded from Earnings Per Share (Details) - shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	6,130,484	6,966,944
Stock options issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	98,105	159,827
Nonvested restricted stock units issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	2,547,955	1,018,312
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	3,484,424	5,788,805

Basic and Diluted Loss per Common Share (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The components of basic and diluted loss per share are as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands, except share and per share amounts)
Earnings per share


Net loss attributable to common stockholders	$	(5,130)	$	(802)	$	(5,409)	$	(13,864)
Net loss per share, basic and diluted	$	(0.20)	$	(0.03)	$	(0.21)	$	(0.55)





















Weighted average number of common shares outstanding, basic and diluted	25,613,441		25,304,057		25,539,642		25,268,216

Schedule of Anti-dilutive Common Shares Excluded from Calculation of Net Loss

The following common share equivalents were excluded from the weighted average shares used to calculate net loss per common share because their effects would have been anti-dilutive:


	As of September 30,
	2023	2022
Stock options issued and outstanding	98,105	159,827
Restricted stock units issued and outstanding	2,547,955	1,018,312
Convertible senior notes	3,484,424	5,788,805
Total	6,130,484	6,966,944

Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2023	Oct. 31, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-38285
Entity Registrant Name	BANDWIDTH INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	56-2242657
Entity Address, Address Line One	2230 Bandmate Way
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27607
City Area Code	(800)
Local Phone Number	808-5150
Title of 12(b) Security	Class A Common Stock, par value $0.001 per share
Trading Symbol	BAND
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001514416
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Class A voting common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		23,683,688
Class B voting common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		1,958,028

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Maturities of marketable securities	$ 18,900		$ 61,800
Proceeds from sale of marketable securities	0	$ 33,100	38,300	$ 33,100
Interest earned on marketable securities (less than)	600	$ 400	1,400	$ 600
Convertible notes \| 2026 Convertible Notes:
Debt Instrument [Line Items]
Fair value	137,700		137,700		$ 180,900
Convertible notes \| 2028 Convertible Notes:
Debt Instrument [Line Items]
Fair value	$ 162,500		$ 162,500		$ 156,500

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Stock-Based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 6,942	$ 4,892	$ 22,325	$ 15,059
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	182	93	578	283
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	2,822	1,767	9,278	5,298
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	1,160	593	3,825	2,219
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 2,778	$ 2,439	$ 8,644	$ 7,259

Stockholders' Equity

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Stockholders' Equity

10. Stockholders’ Equity

The Company had reserved shares of Class A common stock for issuance under stock-based award agreements as follows:


	As of September 30,	As of December 31,
	2023	2022
Stock options issued and outstanding	98,105	159,741
Nonvested restricted stock units issued and outstanding	2,547,955	2,607,106
Stock-based awards available for grant under the 2017 Plan	5,372,159	1,879,368
Total	8,018,219	4,646,215

- Definition

The entire disclosure for equity.

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+ Details

Geographic Information - Reconciliation of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 152,013	$ 148,325	$ 435,731	$ 416,178
Assets	1,070,082		1,070,082		$ 929,318
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	130,571	124,913	370,737	350,281
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	21,442	$ 23,412	64,994	$ 65,897
Assets	$ 6,700		$ 6,700		$ 10,800

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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+ Details

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Operating Leases The Company leases office space under non-cancelable operating lease agreements that expire on various dates through September 2043. As of September 30, 2023, the Company has $501.1 million in future minimum rent payments for its current office space. See Note 5, “Leases,” to the condensed consolidated financial statements, for additional details on the Company’s operating lease commitments. Contractual Obligations As of September 30, 2023, the Company has $12.9 million in non-cancellable purchase obligations, consisting of primarily network equipment maintenance and software license contracts, of which $9.4 million will be fulfilled within one year. Legal Matters The Company is involved as a defendant in various litigation, including, but not limited to, lawsuits alleging that the Company failed to bill, collect and remit certain taxes and surcharges associated with the provision of 911 services pursuant to applicable laws in various jurisdictions. The Company intends to vigorously defend these lawsuits and believes that it has meritorious defenses to each. However, litigation is inherently uncertain, and any judgment or injunctive relief entered against the Company or any adverse settlement could adversely affect the Company’s business, results of operations and financial condition.

Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Schedule of Reserved Shares of Common Stock for Issuance

The Company had reserved shares of Class A common stock for issuance under stock-based award agreements as follows:


	As of September 30,	As of December 31,
	2023	2022
Stock options issued and outstanding	98,105	159,741
Nonvested restricted stock units issued and outstanding	2,547,955	2,607,106
Stock-based awards available for grant under the 2017 Plan	5,372,159	1,879,368
Total	8,018,219	4,646,215

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

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+ Details

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on a Recurring Basis

The following tables

summarize the Company’s financial assets measured at fair value as of September 30, 2023 and December 31, 2022:


	Amortized cost or carrying value		Unrealized gains		Unrealized losses		Fair value measurements on a recurring basis September 30, 2023
							Level 1		Level 2		Level 3		Total

	(In thousands)
Financial assets:
Cash and cash equivalents:
Money market account	$	67,168	$	—	$	—	$	67,168	$	—	$	—	$	67,168





Commercial paper	5,470		—		—		5,470		—		—		5,470

Total included in cash and cash equivalents	72,638		—		—		72,638		—		—		72,638
Marketable securities:
Time deposits	20,000		—		—		20,000		—		—		20,000

Corporate debt securities	265		1		—		—		266		—		266
Commercial paper	11,169		310		—		11,479		—		—		11,479
Total marketable securities	31,434		311		—		31,479		266		—		31,745



Total financial assets	$	104,072	$	311	$	—	$	104,117	$	266	$	—	$	104,383


	Amortized cost or carrying value		Unrealized gains		Unrealized losses		Fair value measurements on a recurring basis December 31, 2022
							Level 1		Level 2		Level 3		Total

	(In thousands)
Financial assets:
Cash and cash equivalents:
Money market account	$	36,728	$	—	$	—	$	36,728	$	—	$	—	$	36,728





Commercial paper	28,254		—		—		28,254		—		—		28,254

Total included in cash and cash equivalents	64,982		—		—		64,982		—		—		64,982
Marketable securities:
Time deposits	6,645		—		(15)		6,630		—		—		6,630
U.S. treasury securities	14,718		74		—		14,792		—		—		14,792
Corporate debt securities	23,412		—		(97)		—		23,315		—		23,315
Commercial paper	26,142		352		—		26,494		—		—		26,494
Total marketable securities	70,917		426		(112)		47,916		23,315		—		71,231



Total financial assets	$	135,899	$	426	$	(112)	$	112,898	$	23,315	$	—	$	136,213

Schedule of Contractual Maturities of Marketable Securities

The following table summarizes the contractual maturities of marketable securities as of September 30, 2023:


	Amortized cost		Aggregate fair value

	(In thousands)
Financial assets:
Less than one year	$	31,434	$	31,745

Total	$	31,434	$	31,745

Financial Statement Components (Tables)

9 Months Ended

Sep. 30, 2023

Financial Statement Components [Abstract]

Schedule of Accounts Receivable, net of Allowances

Accounts receivable, net of allowances consist of the following:


	As of September 30,		As of December 31,
	2023		2022

	(In thousands)
Trade accounts receivable	$	36,477	$	40,332
Unbilled accounts receivable	39,743		33,863
Allowance for doubtful accounts and reserve for expected credit losses	(1,265)		(1,191)
Other accounts receivable	91		1,461
Total accounts receivable, net	$	75,046	$	74,465

Components of allowance for doubtful accounts and reserve for expected credit losses are as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Allowance for doubtful accounts:
Balance, beginning of period	$	(1,616)	$	(945)	$	(1,191)	$	(1,661)
Charged to bad debt expense, net of reversals	260		(117)		(465)		64
Deductions (1)	82		236		386		728
Impact of foreign currency translation	9		34		5		77



Balance, end of period	$	(1,265)	$	(792)	$	(1,265)	$	(792)

________________________

(1) Write-off of uncollectible accounts after all collection efforts have been exhausted.

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:


	As of September 30,		As of December 31,
	2023		2022

	(In thousands)
Accrued expense	$	37,573	$	29,990
Accrued compensation and benefits	14,688		21,595
Accrued sales, use, VAT and telecommunications related taxes	7,489		7,799



Income tax payable	—		2,235
Other accrued expenses	702		958
Total accrued expenses and other current liabilities	$	60,452	$	62,577

Other Liabilities

Other liabilities consisted of the following:


	As of September 30,		As of December 31,
	2023		2022

	(In thousands)
Lease incentive	$	—	$	10,468
Other liabilities	620		708
Total other liabilities	$	620	$	11,176

Debt

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Debt

8. Debt

Revolving Credit Facility

On August 1, 2023, the Company entered into a credit agreement (the “Credit Agreement”) among the Company, as borrower, the lenders from time to time party thereto, and Bank of America, N.A., as administrative agent, swingline lender and letters of credit issuer. The Credit Agreement provides for a $50.0 million revolving credit facility (the “Credit Facility”), including a $15.0 million sublimit for the issuance of letters of credit and a swingline subfacility of up to $5.0 million. The Credit Facility has an accordion feature that allows for an increase in the total borrowing size up to $25.0 million, subject to certain conditions. The Credit Facility matures on the earlier of (a) August 1, 2028 or (b) the date that is 91 days prior to the scheduled maturity date or mandatory conversion date of any of the Company’s outstanding convertible notes. Interest on borrowings under the Credit Facility accrues at an annual rate tied to a base rate or the Secured Overnight Financing Rate (“SOFR”), at the Company’s election. Loans based on SOFR bear interest at a rate equal to term SOFR for the applicable interest period plus 10 basis points plus an applicable margin between 2.25% and 2.75%, and loans based on the base rate bear interest at a rate equal to the base rate plus an applicable margin between 1.25% and 1.75%, in each case of the foregoing, depending upon the Company’s consolidated EBITDA for the most recent period of four consecutive fiscal quarters for which financial statements have been delivered under the Credit Agreement. The Company is required to pay a quarterly commitment fee equal to between 0.05% and 0.0625% on the unused portion of the borrowing commitment, depending upon the Company’s consolidated EBITDA for the most recent period of four consecutive fiscal quarters for which financial statements have been delivered under the Credit Agreement.

On March 10, 2023, Silicon Valley Bank (“SVB”) was closed by the California Department of Financial Protection and Innovation, which appointed the Federal Deposit Insurance Corporation as receiver. As a result, SVB ceased normal banking operations for a period of time. Given these circumstances, on March 14, 2023 (the “Notice Date”), the Company gave notice to SVB of its desire and intent to terminate the commitments (the “Termination”) under that certain credit agreement, dated as of June 6, 2022, among the Company, as borrower, the lenders from time to time party thereto, and SVB, as administrative agent, issuing lender and swingline lender. As of the Notice Date, there were no outstanding borrowings under this credit agreement. The Termination became effective on March 15, 2023.

As of September 30, 2023, unamortized debt issuance costs were $0.7 million, of which $0.2 million were included in prepaid expenses and other current assets and $0.5 million were included in other long-term assets. As of December 31, 2022, unamortized debt issuance costs were $0.4 million, of which $0.2 million were included in prepaid expenses and other current assets and $0.2 million were included in other long-term assets.

As of September 30, 2023, there were no borrowings under the Credit Facility and the Company was in compliance with all financial and non-financial covenants for all periods presented.

Convertible Senior Notes and Capped Call Transactions

2026 Convertible Notes

In February 2020, the Company issued $400.0 million aggregate principal amount of 0.25% Convertible Notes due 2026 in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act (the “2026 Convertible Notes”). The interest on the 2026 Convertible Notes is payable semi-annually in arrears on March 1 and September 1 of each year, beginning on September 1, 2020. The 2026 Convertible Notes will mature on March 1, 2026, unless earlier repurchased, redeemed by the Company, or converted pursuant to their terms. The total net proceeds from the 2026 Convertible Notes, after deducting initial purchaser discounts, costs related to the 2026 Capped Calls (as defined herein), and debt issuance costs, paid by the Company, were approximately $344.7 million. The excess of the principal amount of the liability component over its carrying amount, or the debt discount, was amortized to interest expense at an annual effective interest rate of 0.509% over the contractual terms of the 2026 Convertible Notes.

Each $1,000 principal amount of the 2026 Convertible Notes is initially convertible into 10.9857 shares of the Company’s Class A common stock, par value $0.001 per share, which is equivalent to an initial conversion price of approximately $91.03 per share.

During March 2023, the Company entered into separate, privately negotiated repurchase agreements with a limited number of holders of the 2026 Convertible Notes to repurchase (the “Repurchases”) approximately $65.0 million aggregate principal amount of the 2026 Convertible Notes for an aggregate cash price of approximately $51.3 million. The Repurchases closed on March 6, 2023. The Company had previously entered into capped call transactions with certain financial institutions in connection with the 2026 Convertible Notes. All of these transactions are expected to remain in effect notwithstanding the Repurchases. Following these Repurchases, and the approximate $160.0 million repurchases that closed in November 2022, approximately $175.0 million principal amount of the 2026 Convertible Notes remain outstanding. The difference between the consideration used to repurchase the 2026 Convertible Notes and the carrying value of the 2026 Convertible Notes resulted in a gain of $12.8 million recorded within net gain on extinguishment of debt on the Company’s condensed consolidated statements of operations in the nine months ended September 30, 2023.

2028 Convertible Notes

In March 2021, the Company issued $250.0 million aggregate principal amount of 0.50% Convertible Notes due 2028 in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act (the “2028 Convertible Notes” and, together with the 2026 Convertible Notes, the “Convertible Notes”). The interest on the 2028 Convertible Notes is payable semi-annually in arrears on April 1 and October 1 of each year, beginning on

October 1, 2021. The 2028 Convertible Notes will mature on April 1, 2028, unless earlier repurchased, redeemed by the Company, or converted pursuant to their terms. The total net proceeds from the 2028 Convertible Notes, after deducting initial purchaser discounts, costs related to the 2028 Capped Calls (as defined herein), and debt issuance costs, paid by the Company, were approximately $217.0 million. The excess of the principal amount of the liability component over its carrying amount, or the debt discount, was amortized to interest expense at an annual effective interest rate of 0.442% over the contractual terms of the 2028 Convertible Notes.

Each $1,000 principal amount of the 2028 Convertible Notes is initially convertible into 5.5781 shares of the Company’s Class A common stock, par value $0.001 per share, which is equivalent to an initial conversion price of approximately $179.27 per share.

Other Terms of the Convertible Notes

The Convertible Notes are effectively subordinated to the Company’s future senior secured indebtedness to the extent of the value of the collateral securing that indebtedness. The Convertible Notes are the senior, unsecured obligations of the Company and are equal in right of payment with the Company’s future senior unsecured indebtedness, if any, senior in right of payment to the Company’s existing and future indebtedness that is expressly subordinated to the Convertible Notes and the Convertible Notes will be structurally subordinated to all existing and future indebtedness and other liabilities, including trade payables, and preferred equity, if any, of the Company’s subsidiaries. The Convertible Notes may bear special interest under specified circumstances relating to the Company’s failure to comply with its reporting obligations under the indenture governing the applicable Convertible Notes (each, a “Notes Indenture” and collectively, the “Notes Indentures”) or if the Convertible Notes are not freely tradeable as required by the applicable Notes Indenture.

The conversion rate is subject to adjustment upon the occurrence of certain specified events but will not be adjusted for any accrued and unpaid interest. In addition, upon the occurrence of a make-whole fundamental change (which includes the calling of any Convertible Notes for redemption), as defined in the applicable Notes Indenture, the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its Convertible Notes in connection with such make-whole fundamental change or during the relevant redemption period.

The Company may redeem the Convertible Notes at its option, on or after March 6, 2023 for the 2026 Convertible Notes, and on or after April 6, 2025 for the 2028 Convertible Notes, in each case, at a cash redemption price equal to 100% of the principal amount thereof, plus accrued and unpaid interest, subject to certain conditions. No sinking fund is provided for the Convertible Notes.

The Convertible Notes will be convertible at certain times and upon the occurrence of certain events in the future. Further, on or after September 1, 2025 for the 2026 Convertible Notes, and on or after October 1, 2027 for the 2028 Convertible Notes, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the Convertible Notes may convert all or a portion of their Convertible Notes regardless of these conditions. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of Class A common stock, or a combination of cash and shares of Class A common stock, at the Company’s election. It is the Company’s current intent to settle the principal amount of the Convertible Notes with cash.

During the three and nine months ended September 30, 2023, the conditions allowing the holders of the 2026 Convertible Notes and the 2028 Convertible Notes to convert were not met. The Convertible Notes may be convertible thereafter if one or more of the conversion conditions specified in each respective Notes Indenture are satisfied during future measurement periods. The Company continues to classify the Convertible Notes as a long-term liability in its condensed consolidated balance sheets as of September 30, 2023, based on contractual settlement provisions.

Upon the occurrence of a fundamental change (as defined in the applicable Notes Indenture) prior to the maturity date, holders may require the Company to repurchase all or a portion of the 2026 Convertible Notes or

2028 Convertible Notes for cash at a price equal to the principal amount of the Convertible Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

The net carrying amount of the liability components of the Convertible Notes were as follows:


	As of September 30,		As of December 31,
	2023		2022

2026 Convertible Notes:	(In thousands)
Principal	$	175,000	$	240,000

Unamortized debt issuance costs	(2,108)		(3,805)
2026 Convertible Notes net carrying amount	172,892		236,195

2028 Convertible Notes:
Principal	250,000		250,000

Unamortized debt issuance costs	(4,850)		(5,649)
2028 Convertible Notes net carrying amount	245,150		244,351
Total net carrying amount	$	418,042	$	480,546

The following table sets forth the interest expense recognized related to the Convertible Notes:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

2026 Convertible Notes:	(In thousands)
Contractual interest expense	$	109	$	250	$	356	$	750

Amortization of debt issuance costs	217		497		723		1,488
Total interest expense related to the 2026 Convertible Notes	326		747		1,079		2,238

2028 Convertible Notes:
Contractual interest expense	313		313		939		939

Amortization of debt issuance costs	267		266		797		796
Total interest expense related to the 2028 Convertible Notes	580		579		1,736		1,735
Total interest expense	$	906	$	1,326	$	2,815	$	3,973

Capped Calls

In connection with the offering of the 2026 Convertible Notes and the 2028 Convertible Notes, the Company entered into privately negotiated capped call transactions with certain counterparties (the “2026 Capped Calls” and the “2028 Capped Calls,” respectively and, collectively, the “Capped Calls”). The initial strike price of the Convertible Notes corresponds to the initial conversion price of the 2026 Convertible Notes and the 2028 Convertible Notes. The Capped Calls are generally intended to reduce or offset the potential dilution to the Class A common stock upon any conversion of the 2026 Convertible Notes and 2028 Convertible Notes with such reduction or offset, as the case may be, subject to a cap based on the cap price. The Capped Calls expire on the earlier of (i) the last day on which any convertible securities remain outstanding and (ii) March 1, 2026 for the 2026 Capped Calls and April 1, 2028 for the 2028 Capped Calls, subject to earlier exercise. The Capped Calls are subject to either adjustment or termination upon the occurrence of specified extraordinary events affecting the Company, including a merger event, a tender offer, and a nationalization, insolvency or delisting involving the Company. In addition, the Capped Calls are subject to certain specified additional disruption events that may give rise to a termination of the

Capped Calls, including changes in law, insolvency filings, and hedging disruptions. The Capped Call transactions are recorded in stockholders’ equity and are not accounted for as derivatives. The net cost to purchase the Capped Calls was recorded as a reduction to additional paid-in capital in the accompanying condensed consolidated balance sheets.

The following table sets forth key terms and costs incurred for the Capped Calls related to the Convertible Notes:


	2026 Convertible Notes		2028 Convertible Notes

	(In thousands, except share and per share amounts)
Initial approximate strike price per share, subject to certain adjustments	$	91.03	$	179.27
Initial cap price per share, subject to certain adjustments	$	137.40	$	260.76
Net costs incurred	$	43,320	$	25,500
Class A common stock covered, subject to anti-dilution adjustments	4,394,276		1,394,525

All of the Capped Calls were outstanding as of September 30, 2023.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//470/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
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-Section 50
-Paragraph 1B
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
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-Paragraph 1C
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Paragraph 1E
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Section 50
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-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Section 50
-Paragraph 1I
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

+ Details

Organization and Description of Business	9 Months Ended
Organization and Description of Business	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	1. Organization and Description of Business Bandwidth Inc. (together with its subsidiaries, “Bandwidth” or the “Company”) was founded in July 2000 and incorporated in Delaware on March 29, 2001. The Company’s headquarters are located in Raleigh, North Carolina. The Company is an international cloud-based, software-powered communications platform-as-a-service (“CPaaS”) provider that enables enterprises to create, scale and operate voice or messaging communications services across any mobile application or connected device.

Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (57,254)	$ (44,637)
Net Carrying Value	164,064
Gross Amount	221,942	222,007
Net Carrying Value	164,688	177,370
Licenses, indefinite lived
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Licenses, indefinite lived	624	624
Customer relationships
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Amount	142,148	141,146
Accumulated Amortization	(32,160)	(25,037)
Net Carrying Value	109,988	116,109
Developed technology
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Amount	76,342	77,409
Accumulated Amortization	(22,266)	(16,772)
Net Carrying Value	54,076	60,637
Other, definite lived
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Amount	2,828	2,828
Accumulated Amortization	(2,828)	(2,828)
Net Carrying Value	$ 0	$ 0

Leases - Additional Information (Details) $ in Thousands	Aug. 01, 2023 USD ($) segment	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Option to extend, term (up to)		20 years
Operating right-of-use asset, net		$ 161,106	$ 9,993
Total lease obligations		227,480
Lease incentive		0	$ 10,468
Total lease payments		$ 497,230
Corporate Headquarters
Lessee, Lease, Description [Line Items]
Term of lease	20 years
Number of option to extend \| segment	2
Term of option to extend	10 years
Market rental rate (as a percent)	100.00%
Operating right-of-use asset, net	$ 156,000
Total lease obligations	223,100
Lease incentive	67,800
Total lease payments	495,700
Security deposit	2,500
Escrow to fund	$ 1,000

Financial Statement Components - Allowance For Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of period	$ (1,616)	$ (945)	$ (1,191)	$ (1,661)
Charged to bad debt expense, net of reversals	260	(117)	(465)	64
Deductions	82	236	386	728
Impact of foreign currency translation	9	34	5	77
Balance, end of period	$ (1,265)	$ (792)	$ (1,265)	$ (792)

Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Capitalized software development costs, additions	$ 3.4	$ 0.9	$ 8.4	$ 2.1
Amortization of capitalized software development costs	0.8	$ 0.6	2.2	$ 1.6
Capitalized implementation costs related to cloud computing arrangements	0.2		0.2
Cost of assets under finance leases	0.5		0.5
Accumulated depreciation of assets under finance leases	0.3		0.3
Prepaid expenses and other current assets
Property, Plant and Equipment [Line Items]
Capitalized implementation costs related to cloud computing arrangements	0.1		0.1
Other long-term assets
Property, Plant and Equipment [Line Items]
Capitalized implementation costs related to cloud computing arrangements	$ 0.1		$ 0.1

Property, Plant and Equipment - Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 6,647	$ 4,661	$ 16,727	$ 13,848
Cost of revenue
Property, Plant and Equipment [Line Items]
Total depreciation expense	4,056	3,403	11,790	10,141
Research and development
Property, Plant and Equipment [Line Items]
Total depreciation expense	1,199	610	2,461	1,767
Sales and marketing
Property, Plant and Equipment [Line Items]
Total depreciation expense	905	346	1,486	1,027
General and administrative
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 487	$ 302	$ 990	$ 913

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 107,373	$ 113,641
Marketable securities	31,745	71,231
Accounts receivable, net of allowance for doubtful accounts	75,046	74,465
Deferred costs	4,185	3,566
Prepaid expenses and other current assets	16,037	16,705
Total current assets	234,386	279,608
Property, plant and equipment, net	176,780	99,753
Operating right-of-use asset, net	161,106	9,993
Intangible assets, net	164,688	177,370
Deferred costs, non-current	4,715	4,938
Other long-term assets	6,404	31,251
Goodwill	322,003	326,405
Total assets	1,070,082	929,318
Current liabilities:
Accounts payable	31,211	26,750
Accrued expenses and other current liabilities	60,452	62,577
Current portion of deferred revenue	7,869	7,181
Advanced billings	4,305	10,049
Operating lease liability, current	4,766	7,450
Total current liabilities	108,603	114,007
Other liabilities	620	11,176
Operating lease liability, net of current portion	222,714	4,640
Deferred revenue, net of current portion	8,098	8,306
Deferred tax liability	32,018	38,466
Convertible senior notes	418,042	480,546
Total liabilities	790,095	657,141
Stockholders’ equity:
Preferred stock: $0.001 par value; 10,000,000 shares authorized; no shares issued and outstanding	0	0
Additional paid-in capital	383,013	364,913
Accumulated deficit	(53,956)	(48,547)
Accumulated other comprehensive loss	(49,096)	(44,214)
Total stockholders’ equity	279,987	272,177
Total liabilities and stockholders’ equity	1,070,082	929,318
Class A voting common stock
Stockholders’ equity:
Class A and Class B common stock	24	23
Class B voting common stock
Stockholders’ equity:
Class A and Class B common stock	$ 2	$ 2

Financial Statement Components - Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial Statement Components [Abstract]
Lease incentive	$ 0	$ 10,468
Other liabilities	620	708
Other liabilities	$ 620	$ 11,176

Basic and Diluted Loss per Common Share

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Basic and Diluted Loss per Common Share

14. Basic and Diluted Loss per Common Share

Basic net loss per share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. The Company is in a net loss position for the three and nine months ended September 30, 2023 and 2022 and therefore diluted shares equals basic shares.

The components of basic and diluted loss per share are as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands, except share and per share amounts)
Earnings per share


Net loss attributable to common stockholders	$	(5,130)	$	(802)	$	(5,409)	$	(13,864)
Net loss per share, basic and diluted	$	(0.20)	$	(0.03)	$	(0.21)	$	(0.55)





















Weighted average number of common shares outstanding, basic and diluted	25,613,441		25,304,057		25,539,642		25,268,216

The following common share equivalents were excluded from the weighted average shares used to calculate net loss per common share because their effects would have been anti-dilutive:


	As of September 30,
	2023	2022
Stock options issued and outstanding	98,105	159,827
Restricted stock units issued and outstanding	2,547,955	1,018,312
Convertible senior notes	3,484,424	5,788,805
Total	6,130,484	6,966,944

Stock-Based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Number of options outstanding
Beginning balance (in shares) \| shares		159,741
Granted (in shares) \| shares	0	0
Exercised (in shares) \| shares		(61,349)
Forfeited or cancelled (in shares) \| shares		(287)
Ending balance (in shares) \| shares	98,105	98,105	159,741
Options vested and exercisable (in shares) \| shares	98,105	98,105
Options vested and expected to vest (in shares) \| shares	98,105	98,105
Weighted- average exercise price (Per share)
Beginning balance (in usd per share) \| $ / shares		$ 10.42
Granted (in usd per share) \| $ / shares		0
Exercised (in usd per share) \| $ / shares		6.74
Forfeited or cancelled (in usd per share) \| $ / shares		9.16
Ending balance (in usd per share) \| $ / shares	$ 12.73	12.73	$ 10.42
Weighted-average exercise price, Options vested and exercisable (in usd per share) \| $ / shares	12.73	12.73
Weighted-average exercise price, Options vested and expected to vest (in usd per share) \| $ / shares	$ 12.73	$ 12.73
Weighted- average remaining contract life (In years)
Outstanding (in years)		3 years 2 months 19 days	2 years 6 months 25 days
Options vested and exercisable at September 30, 2023		3 years 2 months 19 days
Options vested and expected to vest as of September 30, 2023		3 years 2 months 19 days
Aggregate intrinsic value (In thousands)
Options outstanding \| $	$ 116	$ 116	$ 2,001
Options vested and exercisable at September 30, 2023 \| $	116	116
Options vested and expected to vest as of September 30, 2023 \| $	$ 116	$ 116

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,130)	$ (802)	$ (5,409)	$ (13,864)
Other comprehensive loss
Unrealized (loss) gain on marketable securities, net of income taxes	(129)	458	(3)	120
Foreign currency translation, net of income taxes	(12,760)	(29,702)	(4,879)	(69,993)
Total other comprehensive loss	(12,889)	(29,244)	(4,882)	(69,873)
Total comprehensive loss	$ (18,019)	$ (30,046)	$ (10,291)	$ (83,737)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Name Accounting Standards Codification
-Section S99
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes At the end of each interim reporting period, the Company determines the income tax provision by using an estimate of the annual effective tax rate, adjusted for discrete items occurring in the quarter. The effective income tax rate reflects the effect of federal, international, and state income taxes and the permanent impacts of differences in book and tax accounting. The Company’s effective tax rate was 4.1% and 37.1% for the three and nine months ended September 30, 2023, respectively, and 53.5% and 7.7% for the three and nine months ended September 30, 2022, respectively. For the three months ended September 30, 2023, the effective tax rate decreased from the three months ended September 30, 2022, primarily due to increased operating losses in the U.S., where tax benefits are not recognized due to a valuation allowance. For the nine months ended September 30, 2023, the effective tax rate increased from the nine months ended September 30, 2022, primarily due to increased operating losses outside of the U.S., where tax benefits are recognized and are not offset by a valuation allowance. Judgment is required in determining whether deferred tax assets will be realized in full or in part. Management assesses the available positive and negative evidence on a jurisdictional basis to estimate if deferred tax assets will be recognized and when it is more likely than not that all or some deferred tax assets will not be realized, and a valuation allowance must be established. As of September 30, 2023, the Company continues to maintain a valuation allowance against its U.S. federal and state net deferred tax assets. The Company’s effective tax rate for the three and nine months ended September 30, 2023 differed from the federal statutory tax rate of 21% in the U.S. primarily due to differing statutory tax rates in international jurisdictions and the valuation allowance recorded against its U.S. federal and state net deferred tax assets. Other permanent tax adjustments within the effective tax rates, which are offset by the valuation allowance, include state taxes, federal research credit under Internal Revenue Code Section 41, equity compensation in the U.S. and other U.S. non-deductible expenditures.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-13

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+ Details

Stockholders' Equity - Reserved Shares of Common Stock for Issuance (Details) - shares	Sep. 30, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	8,018,219	4,646,215
Stock options issued and outstanding
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	98,105	159,741
Nonvested restricted stock units issued and outstanding
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	2,547,955	2,607,106
Stock-based awards available for grant under the 2017 Plan
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	5,372,159	1,879,368

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 505
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+ Details

Goodwill and Intangible Assets - Summary of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 326,405
Foreign currency translation adjustments	(4,402)
Ending balance	$ 322,003

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References + Details

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended							9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net loss	$ (5,130)	$ (3,890)	$ 3,611	$ 33,434	$ (802)	$ (6,248)	$ (6,814)	$ (5,409)	$ (13,864)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The change in the carrying amounts of goodwill was as follows:


	Total

	(In thousands)






Balance as of December 31, 2022	$	326,405
Foreign currency translation adjustments	(4,402)
Balance as of September 30, 2023	$	322,003

Schedule of Finite Lived Intangible Assets

Intangible assets, net consisted of the following as of September 30, 2023:


	Gross Amount		Accumulated Amortization		Net Carrying Value

	(In thousands)
Customer relationships	$	142,148	$	(32,160)	$	109,988



Developed technology	76,342		(22,266)		54,076
Other, definite lived	2,828		(2,828)		—
Licenses, indefinite lived	624		—		624







Total intangible assets, net	$	221,942	$	(57,254)	$	164,688

Intangible assets, net consisted of the following as of December 31, 2022:


	Gross Amount		Accumulated Amortization		Net Carrying Value

	(In thousands)
Customer relationships	$	141,146	$	(25,037)	$	116,109



Developed technology	77,409		(16,772)		60,637
Other, definite lived	2,828		(2,828)		—
Licenses, indefinite lived	624		—		624







Total intangible assets, net	$	222,007	$	(44,637)	$	177,370

Schedule of Infinite Lived Intangible Assets

Intangible assets, net consisted of the following as of September 30, 2023:


	Gross Amount		Accumulated Amortization		Net Carrying Value

	(In thousands)
Customer relationships	$	142,148	$	(32,160)	$	109,988



Developed technology	76,342		(22,266)		54,076
Other, definite lived	2,828		(2,828)		—
Licenses, indefinite lived	624		—		624







Total intangible assets, net	$	221,942	$	(57,254)	$	164,688

Intangible assets, net consisted of the following as of December 31, 2022:


	Gross Amount		Accumulated Amortization		Net Carrying Value

	(In thousands)
Customer relationships	$	141,146	$	(25,037)	$	116,109



Developed technology	77,409		(16,772)		60,637
Other, definite lived	2,828		(2,828)		—
Licenses, indefinite lived	624		—		624







Total intangible assets, net	$	222,007	$	(44,637)	$	177,370

Schedule of Amortization Expense

The Company recognized amortization expense as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Cost of revenue	$	1,959	$	1,831	$	5,863	$	5,797

Sales and marketing	2,389		2,287		7,097		7,221

Total amortization expense	$	4,348	$	4,118	$	12,960	$	13,018

Schedule of Future Estimated Amortization Expense

Future estimated amortization expense for definite lived intangible assets is as follows:


	As of September 30,
	2023

	(In thousands)
2023 (remaining)	$	4,234
2024	16,937
2025	16,937
2026	16,937
2027	16,937


Thereafter	92,082
	$	164,064

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482573/350-20-50-2

+ Details

Debt - Interest Income and Interest Expense Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Total interest expense	$ 906	$ 1,326	$ 2,815	$ 3,973
2026 Convertible Notes:
Debt Instrument [Line Items]
Contractual interest expense	109	250	356	750
Amortization of debt issuance costs	217	497	723	1,488
Total interest expense	326	747	1,079	2,238
2028 Convertible Notes:
Debt Instrument [Line Items]
Contractual interest expense	313	313	939	939
Amortization of debt issuance costs	267	266	797	796
Total interest expense	$ 580	$ 579	$ 1,736	$ 1,735

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Debt - 2028 Convertible Notes (Details)	1 Months Ended	9 Months Ended
Debt - 2028 Convertible Notes (Details)	Mar. 31, 2021 USD ($) $ / shares	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2022	Dec. 31, 2022 USD ($) $ / shares	Feb. 28, 2020 $ / shares
Class A voting common stock
Debt Instrument [Line Items]
Common stock, par value (in usd per share) \| $ / shares	$ 0.001	$ 0.001		$ 0.001	$ 0.001
2028 Convertible Notes: \| Convertible notes
Debt Instrument [Line Items]
Principal amount \| $	$ 250,000,000	$ 250,000,000		$ 250,000,000
Stated rate (as a percent)	0.50%
Total net proceeds \| $	$ 217,000,000
Effective interest rate (as a percent)	0.442%
Conversion price (in usd per share) \| $ / shares	$ 179.27
2028 Convertible Notes: \| Convertible notes \| Class A voting common stock
Debt Instrument [Line Items]
Conversion ratio	0.0055781	0.0055781	0.0055781

Stock-Based Compensation

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

11. Stock-Based Compensation

Stock Options

The following summarizes the stock option activity for the nine months ended September 30, 2023:


	Number of options outstanding	Weighted- average exercise price (Per share)		Weighted- average remaining contract life (In years)	Aggregate intrinsic value (In thousands)
Outstanding as of December 31, 2022	159,741	$	10.42	2.57	$	2,001
Granted	—	—
Exercised	(61,349)	6.74
Forfeited or cancelled	(287)	9.16
Outstanding as of September 30, 2023	98,105	$	12.73	3.22	$	116

Options vested and exercisable at September 30, 2023	98,105	$	12.73	3.22	$	116
Options vested and expected to vest as of September 30, 2023	98,105	$	12.73	3.22	$	116

No options were granted for the three and nine months ended September 30, 2023.

As of September 30, 2023, the Company had no unrecognized compensation cost related to non-vested stock options. All outstanding stock options were fully vested prior to December 31, 2022.

Restricted Stock Units

The following summarizes the restricted stock unit (“RSU”) activity for the nine months ended September 30, 2023:


	Number of awards outstanding	Weighted-average grant date fair value (Per share)
Nonvested RSUs as of December 31, 2022	2,607,106	$	32.33
Granted	360,927	13.16
Vested	(281,166)	50.45
Forfeited or cancelled	(138,912)	28.76
Nonvested RSUs as of September 30, 2023	2,547,955	$	27.81

As of September 30, 2023, total unrecognized compensation cost related to non-vested RSUs was $54.1 million, which will be amortized over a weighted-average period of 2.21 years.

Stock-Based Compensation Expense

The Company recognized total stock-based compensation expense as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Cost of revenue	$	182	$	93	$	578	$	283
Research and development	2,822		1,767		9,278		5,298
Sales and marketing	1,160		593		3,825		2,219
General and administrative	2,778		2,439		8,644		7,259
Total	$	6,942	$	4,892	$	22,325	$	15,059

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2020-06 [Member]

- Definition

Indicates amendment to accounting standards.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Leases (Tables)

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Components of Lease Expense and Supplemental Cash Flow and Other Information

The components of lease expense recorded in the condensed consolidated statements of operations were as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Operating lease cost	$	5,311	$	1,809	$	8,798	$	6,037





Sublease income	—		(14)		—		(206)
Total net lease cost	$	5,311	$	1,795	$	8,798	$	5,831

Other supplemental information related to operating leases were as follows:


	Nine months ended September 30,
		2023		2022

		(In thousands)








Weighted average remaining lease term (in years)		19.33		2.28



Weighted average discount rate		8.73	%	4.61	%

Schedule of Maturities of Operating Lease Liabilities

Maturities of operating lease liabilities were as follows:


	As of September 30,
	2023


	(In thousands)

2023 (remaining)	$	5,029
2024	23,544
2025	22,904
2026	22,365
2027	22,119

Thereafter	401,269
Total lease payments	497,230
Less: imputed interest	(269,750)

Total lease obligations	227,480
Less: current obligations	(4,766)
Long-term lease obligations	$	222,714

Schedule of Maturities of Finance Lease Liabilities

Maturities of operating lease liabilities were as follows:


	As of September 30,
	2023


	(In thousands)

2023 (remaining)	$	5,029
2024	23,544
2025	22,904
2026	22,365
2027	22,119

Thereafter	401,269
Total lease payments	497,230
Less: imputed interest	(269,750)

Total lease obligations	227,480
Less: current obligations	(4,766)
Long-term lease obligations	$	222,714

Leases - Supplemental Cash Flow and Other Information (Details)	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Weighted average remaining lease term (in years)	19 years 3 months 29 days	2 years 3 months 10 days
Weighted average discount rate	8.73%	4.61%

Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2023

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment, Net

Property, plant and equipment, net consisted of the following:


	As of September 30,		As of December 31,		Useful Life
	2023		2022

	(In thousands)				(In years)
Furniture and fixtures	$	17,204	$	16,494	5
Computer and office equipment	16,215		14,160		2 to 10
Telecommunications equipment	79,925		80,251		5 to 7
Leasehold improvements	79,683		6,410		5 to 20
Software	10,822		7,051		3
Internal-use software development	31,139		23,677		4
Automobile	526		665		3
Land	27,636		23,090		Indefinite
Land Improvements	1,065		—		20
Total cost	264,215		171,798
Less—accumulated depreciation	(87,435)		(72,045)
Total property, plant and equipment, net	$	176,780	$	99,753

Schedule of Depreciation Expense

The Company recognized depreciation expense, which includes amortization of capitalized software development costs, as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Cost of revenue	$	4,056	$	3,403	$	11,790	$	10,141
Research and development	1,199		610		2,461		1,767
Sales and marketing	905		346		1,486		1,027
General and administrative	487		302		990		913
Total depreciation expense	$	6,647	$	4,661	$	16,727	$	13,848

Goodwill and Intangible Assets - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Weighted average useful life	10 years 3 months 18 days

Fair Value Measurements - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 107,373	$ 113,641	$ 166,384
Amortized cost or carrying value	31,434	70,917
Unrealized gains	311	426
Unrealized losses	0	(112)
Total marketable securities	31,745
Total financial assets	104,072	135,899
Money market account
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	67,168	36,728
Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost or carrying value	20,000	6,645
Unrealized gains	0	0
Unrealized losses	0	(15)
U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost or carrying value		14,718
Unrealized gains		74
Unrealized losses		0
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost or carrying value	265	23,412
Unrealized gains	1	0
Unrealized losses	0	(97)
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	5,470	28,254
Amortized cost or carrying value	11,169	26,142
Unrealized gains	310	352
Unrealized losses	0	0
Total included in cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	72,638	64,982
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	31,745	71,231
Total financial assets	104,383	136,213
Recurring \| Money market account
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	67,168	36,728
Recurring \| Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	20,000	6,630
Recurring \| U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities		14,792
Recurring \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	266	23,315
Recurring \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	5,470	28,254
Total marketable securities	11,479	26,494
Recurring \| Total included in cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	72,638	64,982
Recurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	31,479	47,916
Total financial assets	104,117	112,898
Recurring \| Level 1 \| Money market account
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	67,168	36,728
Recurring \| Level 1 \| Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	20,000	6,630
Recurring \| Level 1 \| U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities		14,792
Recurring \| Level 1 \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	0	0
Recurring \| Level 1 \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	5,470	28,254
Total marketable securities	11,479	26,494
Recurring \| Level 1 \| Total included in cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	72,638	64,982
Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	266	23,315
Total financial assets	266	23,315
Recurring \| Level 2 \| Money market account
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Recurring \| Level 2 \| Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	0	0
Recurring \| Level 2 \| U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities		0
Recurring \| Level 2 \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	266	23,315
Recurring \| Level 2 \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Total marketable securities	0	0
Recurring \| Level 2 \| Total included in cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Recurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	0	0
Total financial assets	0	0
Recurring \| Level 3 \| Money market account
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Recurring \| Level 3 \| Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	0	0
Recurring \| Level 3 \| U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities		0
Recurring \| Level 3 \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	0	0
Recurring \| Level 3 \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Total marketable securities	0	0
Recurring \| Level 3 \| Total included in cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 0	$ 0

Debt - Convertible Senior Notes and Capped Call Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 16, 2021	Feb. 28, 2020
Debt Instrument [Line Items]
Net costs incurred	$ 25,500	$ 43,320
Class A voting common stock
Debt Instrument [Line Items]
Class A common stock covered, subject to anti-dilution adjustments (in shares)	1,394,525	4,394,276
Convertible notes \| 2026 Convertible Notes
Debt Instrument [Line Items]
Initial conversion strike price (in usd per share)		$ 91.03
Initial cap price (in usd per share)		$ 137.40
Convertible notes \| 2028 Convertible Notes
Debt Instrument [Line Items]
Initial conversion strike price (in usd per share)	$ 179.27
Initial cap price (in usd per share)	$ 260.76

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Goodwill and Intangible Assets - Future Estimated Amortization Expense (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2023 (remaining)	$ 4,234
2024	16,937
2025	16,937
2026	16,937
2027	16,937
Thereafter	92,082
Net Carrying Value	$ 164,064

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Operating lease cost	$ 5,311	$ 1,809	$ 8,798	$ 6,037
Sublease income	0	(14)	0	(206)
Total net lease cost	$ 5,311	$ 1,795	$ 8,798	$ 5,831

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K, filed with the SEC on February 23, 2023. The condensed consolidated balance sheet as of December 31, 2022, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures, including certain notes required by GAAP on an annual reporting basis. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2023 or any future period.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of Bandwidth Inc. and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of the Company’s condensed consolidated financial statements in conformity with GAAP requires the Company to make estimates and judgments that affect the amounts reported in these financial statements and accompanying notes. These estimates in the condensed consolidated financial statements include, but are not limited to, allowance for doubtful accounts, reserve for expected credit losses, reserve for sales credits, recoverability of long lived and intangible assets, fair value of acquired intangible assets and goodwill, discount rates used in the valuation of right-of-use assets and lease liabilities, the fair value of the liability of the Company’s Convertible Notes (as defined herein), estimated period of benefit, valuation allowances on deferred tax assets, certain accrued expenses and contingencies, economic and demographic actuarial assumptions related to pension and other postretirement benefit costs and liabilities. Although the Company believes that the estimates it uses are reasonable, due to the inherent uncertainty involved in making these estimates, actual results reported in future periods could differ from those estimates.
Marketable Securities	Marketable SecuritiesThe Company classifies marketable securities as available-for-sale at the time of purchase and reevaluates such classification as of each balance sheet date. The Company may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, the Company classifies investments with maturities greater than 90 days as marketable securities in the accompanying condensed consolidated balance sheets. The Company evaluates its investments to assess whether the amortized cost basis is in excess of estimated fair value and determines what amount of that difference, if any, is caused by expected credit losses. Allowances for credit losses are recognized as a charge in other income (expense), net on the condensed consolidated statements of operations, and any remaining unrealized losses are included in accumulated other comprehensive loss on the condensed consolidated balance sheets.
Accounts Receivable and Current Expected Credit Losses	Accounts Receivable and Current Expected Credit Losses Accounts receivable are stated at realizable value, net of allowances, which includes an allowance for doubtful accounts and a reserve for expected credit losses. The allowance for doubtful accounts is based on management’s assessment of the collectability of its customer accounts. The Company regularly reviews the composition of the accounts receivable aging, historical bad debts, changes in payment patterns, customer creditworthiness, current economic trends, and reasonable and supportable forecasts about the future. Relevant risk characteristics include customer size and historical loss patterns. Management has evaluated the expected credit losses related to trade accounts receivable and determined that an allowance of approximately $1.3 million and $1.2 million for uncollectible accounts and customer balances that are disputed was required as of September 30, 2023 and December 31, 2022, respectively. Refer to Note 4, “Financial Statement Components” to these condensed consolidated financial statements, for a rollforward of the components of the allowances for the three and nine months ended September 30, 2023 and 2022. The Company includes unbilled receivables in its accounts receivable balance. Generally, these receivables represent earned revenue from services provided to customers, which will be billed in the next billing cycle. All amounts are considered collectible and billable.
Current Expected Credit Losses	Accounts Receivable and Current Expected Credit Losses Accounts receivable are stated at realizable value, net of allowances, which includes an allowance for doubtful accounts and a reserve for expected credit losses. The allowance for doubtful accounts is based on management’s assessment of the collectability of its customer accounts. The Company regularly reviews the composition of the accounts receivable aging, historical bad debts, changes in payment patterns, customer creditworthiness, current economic trends, and reasonable and supportable forecasts about the future. Relevant risk characteristics include customer size and historical loss patterns. Management has evaluated the expected credit losses related to trade accounts receivable and determined that an allowance of approximately $1.3 million and $1.2 million for uncollectible accounts and customer balances that are disputed was required as of September 30, 2023 and December 31, 2022, respectively. Refer to Note 4, “Financial Statement Components” to these condensed consolidated financial statements, for a rollforward of the components of the allowances for the three and nine months ended September 30, 2023 and 2022. The Company includes unbilled receivables in its accounts receivable balance. Generally, these receivables represent earned revenue from services provided to customers, which will be billed in the next billing cycle. All amounts are considered collectible and billable.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that are exposed to concentration of credit risk consist primarily of cash and cash equivalents, marketable securities and trade accounts receivable. The Company maintains its cash, cash equivalents and marketable securities with high credit-quality financial institutions. Certain balances held by such financial institutions exceed insured limits. With regard to customers, credit evaluation and account monitoring procedures are used to minimize the risk of loss. The Company believes that no additional credit risk beyond amounts provided for by the allowance for doubtful accounts are inherent in accounts receivable.
Recent Accounting Pronouncements Not Yet Adopted	Recent Accounting Pronouncements Not Yet Adopted There were no recent accounting pronouncements not yet adopted during the three and nine months ended September 30, 2023 that were significant to the Company.
Fair Value Measurements	The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. The hierarchy requires use of observable inputs when available, and to minimize the use of unobservable inputs when determining fair value. The three tiers are defined as follows: •Level 1. Observable inputs based on unadjusted quoted prices in active markets for identical assets or liabilities; •Level 2. Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and •Level 3. Unobservable inputs for which there is little or no market data, which requires the Company to develop its own assumptions. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate fair value as of September 30, 2023 and December 31, 2022 because of the relatively short duration of these instruments. Marketable securities consist of time deposits, corporate debt securities, U.S. treasury securities, and commercial paper not otherwise classified as cash equivalents. All marketable securities are considered to be available-for-sale and are recorded at their estimated fair values. Unrealized gains and losses for available-for-sale securities are recorded in accumulated other comprehensive loss.

Leases - Schedule of Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Operating Leases
2023 (remaining)	$ 5,029
2024	23,544
2025	22,904
2026	22,365
2027	22,119
Thereafter	401,269
Total lease payments	497,230
Less: imputed interest	(269,750)
Total lease obligations	227,480
Less: current obligations	(4,766)	$ (7,450)
Long-term lease obligations	$ 222,714	$ 4,640

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 152,013	$ 148,325	$ 435,731	$ 416,178
Cost of revenue	92,514	84,861	261,624	241,896
Gross profit	59,499	63,464	174,107	174,282
Operating expenses
Research and development	24,792	25,044	75,305	71,735
Sales and marketing	25,011	23,184	75,794	69,663
General and administrative	15,843	16,623	48,430	50,191
Total operating expenses	65,646	64,851	199,529	191,589
Operating loss	(6,147)	(1,387)	(25,422)	(17,307)
Other income (expense), net
Net gain on extinguishment of debt	0	0	12,767	0
Gain on business interruption insurance recoveries	0	0	4,000	0
Other income (expense), net	798	(338)	52	2,282
Total other income (expense), net	798	(338)	16,819	2,282
Loss before income taxes	(5,349)	(1,725)	(8,603)	(15,025)
Income tax benefit	219	923	3,194	1,161
Net loss	$ (5,130)	$ (802)	$ (5,409)	$ (13,864)
Net loss per share, basic (in usd per share)	$ (0.20)	$ (0.03)	$ (0.21)	$ (0.55)
Net loss per share, diluted (in usd per share)	$ (0.20)	$ (0.03)	$ (0.21)	$ (0.55)
Weighted average number of common shares outstanding, basic (in shares)	25,613,441	25,304,057	25,539,642	25,268,216
Weighted average number of common shares outstanding, diluted (in shares)	25,613,441	25,304,057	25,539,642	25,268,216

Financial Statement Components - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial Statement Components [Abstract]
Accrued expense	$ 37,573	$ 29,990
Accrued compensation and benefits	14,688	21,595
Accrued sales, use, VAT and telecommunications related taxes	7,489	7,799
Income tax payable	0	2,235
Other accrued expenses	702	958
Total accrued expenses and other current liabilities	$ 60,452	$ 62,577

Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

7. Goodwill and Intangible Assets

Goodwill

The change in the carrying amounts of goodwill was as follows:


	Total

	(In thousands)






Balance as of December 31, 2022	$	326,405
Foreign currency translation adjustments	(4,402)
Balance as of September 30, 2023	$	322,003

Intangible Assets

Intangible assets, net consisted of the following as of September 30, 2023:


	Gross Amount		Accumulated Amortization		Net Carrying Value

	(In thousands)
Customer relationships	$	142,148	$	(32,160)	$	109,988



Developed technology	76,342		(22,266)		54,076
Other, definite lived	2,828		(2,828)		—
Licenses, indefinite lived	624		—		624







Total intangible assets, net	$	221,942	$	(57,254)	$	164,688

Intangible assets, net consisted of the following as of December 31, 2022:


	Gross Amount		Accumulated Amortization		Net Carrying Value

	(In thousands)
Customer relationships	$	141,146	$	(25,037)	$	116,109



Developed technology	77,409		(16,772)		60,637
Other, definite lived	2,828		(2,828)		—
Licenses, indefinite lived	624		—		624







Total intangible assets, net	$	222,007	$	(44,637)	$	177,370

The Company recognized amortization expense as follows:


	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022

	(In thousands)
Cost of revenue	$	1,959	$	1,831	$	5,863	$	5,797

Sales and marketing	2,389		2,287		7,097		7,221

Total amortization expense	$	4,348	$	4,118	$	12,960	$	13,018

The remaining weighted average amortization period for definite lived intangible assets is 10.3 years.

Future estimated amortization expense for definite lived intangible assets is as follows:


	As of September 30,
	2023

	(In thousands)
2023 (remaining)	$	4,234
2024	16,937
2025	16,937
2026	16,937
2027	16,937


Thereafter	92,082
	$	164,064

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 1,265		$ 1,265		$ 1,191
Unbilled accounts receivable	39,743		39,743		$ 33,863
Gain on business interruption insurance recoveries	$ 0	$ 0	$ 4,000	$ 0

Stock-Based Compensation - Additional Information (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($) shares	Sep. 30, 2023 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares	0	0
Unrecognized cost for stock based compensation	$ 0	$ 0
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested RSUs	$ 54,100,000	$ 54,100,000
Unrecognized cost for stock based compensation, period for recognition (in years)		2 years 2 months 15 days

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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+ Details

Commitments and Contingencies - Additional Information (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Lease payments of initial term	$ 497,230
Non-cancellable purchase obligation	12,900
Non-cancellable purchase obligation, fulfilled within a year	9,400
Office Space
Lessee, Lease, Description [Line Items]
Lease payments of initial term	$ 501,100

Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Goodwill [Line Items]
Total amortization expense	$ 4,348	$ 4,118	$ 12,960	$ 13,018
Cost of revenue
Goodwill [Line Items]
Total amortization expense	1,959	1,831	5,863	5,797
Sales and marketing
Goodwill [Line Items]
Total amortization expense	$ 2,389	$ 2,287	$ 7,097	$ 7,221

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details