10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2022

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to             

Commission File Number: 001-36383

Five9, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	94-3394123
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

3001 Bishop Drive, Suite 350

San Ramon, CA 94583

(Address of Principal Executive Offices) (Zip Code)

(925) 201-2000

(Registrant’s Telephone Number, Including Area Code)

_______________________________

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common stock, par value $0.001 per share	FIVN	The NASDAQ Global Market

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes: ☒    No:  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes: ☒  No: ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company”, and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer	☒		Accelerated Filer	☐
Non-accelerated filer	☐	(Do not check if a smaller reporting Company)	Smaller Reporting Company	☐
			Emerging Growth Company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  Yes: ☐  No: ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes: ☐ No: ☒

As of April 22, 2022, there were 69,557,425 shares of the Registrant’s common stock, par value $0.001 per share, outstanding.

FIVE9, INC.

FORM 10-Q

TABLE OF CONTENTS

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS	2
PART I. FINANCIAL INFORMATION
ITEM 1. Financial Statements	4
Condensed Consolidated Balance Sheets (Unaudited)	4
Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited)	5
Condensed Consolidated Statements of Stockholder’ Equity (Unaudited)	6
Condensed Consolidated Statements of Cash Flows (Unaudited)	7
Notes to Condensed Consolidated Financial Statements (Unaudited)	8
ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
Overview	29
Key Operating and Financial Performance Metrics	30
Key Components of Our Results of Operations	32
Results of Operations for the Three Months Ended March 31, 2022 and 2021	33
Liquidity and Capital Resources	36
Critical Accounting Policies and Estimates	38
Recent Accounting Pronouncements	38
Contractual and Other Obligations	38
ITEM 3. Quantitative and Qualitative Disclosure about Market Risk	40
ITEM 4. Controls and Procedures	41
PART II. OTHER INFORMATION
ITEM 1. Legal Proceedings	42
ITEM 1A. Risk Factors	42
ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds	43
ITEM 3. Defaults Upon Senior Securities	43
ITEM 4. Mine Safety Disclosures	43
ITEM 5. Other Information	43
ITEM 6. Exhibits	44
SIGNATURES	45

1

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, which involve substantial risks and uncertainties. These statements reflect the current views of our senior management with respect to future events and our financial performance. These forward-looking statements include statements with respect to our business, expenses, strategies, losses, growth plans, product and client initiatives, market growth projections, and our industry. Statements that include the words “expect,” “intend,” “plan,” “believe,” “project,” “forecast,” “estimate,” “may,” “should,” “anticipate” and similar statements of a future or forward-looking nature identify forward-looking statements for purposes of the federal securities laws or otherwise.

Forward-looking statements address matters that involve risks and uncertainties. Accordingly, there are or will be important factors that could cause our actual results to differ materially from those indicated in these statements. These factors include the information set forth in Part 1, Item 1A, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 and Part II, Item 1A, of this Quarterly Report, which we encourage you to carefully read, and include the following:

•our quarterly and annual results may fluctuate significantly, including as a result of the timing and success of new product and feature introductions by us, may not fully reflect the underlying performance of our business and may result in decreases in the price of our common stock;

•if we are unable to attract new clients or sell additional services and functionality to our existing clients, our revenue and revenue growth will be harmed;

•our recent rapid growth may not be indicative of our future growth, and even if we continue to grow rapidly, we may fail to manage our growth effectively;

•failure to adequately retain and expand our sales force will impede our growth;

•if we fail to manage our technical operations infrastructure, our existing clients may experience service outages, our new clients may experience delays in the deployment of our solution and we could be subject to, among other things, claims for credits or damages;

•our growth depends in part on the success of our strategic relationships with third parties and our failure to successfully maintain, grow and manage these relationships could harm our business;

•we have established, and are continuing to increase, our network of master agents and resellers to sell our solution; our failure to effectively develop, manage, and maintain this network could materially harm our revenues;

•the markets in which we participate involve a high number of competitors that is continuing to increase, and if we do not compete effectively, our operating results could be harmed;

•adverse economic conditions may harm our business;

•we continue to expand our international operations, which exposes us to significant risks;

•the effects of the COVID-19 pandemic have materially affected how we, our clients and business partners are operating, and the duration and extent to which it will impact our future results of operations and overall financial performance remain uncertain;

•security breaches and improper access to or disclosure of our data or our clients’ data, or other cyber attacks on our systems, could result in litigation and regulatory risk, harm our reputation and our business;

•we may acquire other companies, or technologies or be the target of strategic transactions, or be impacted by transactions by other companies, which could divert our management’s attention, result in additional dilution to our stockholders or use a significant amount of our cash resources and otherwise disrupt our operations and harm our operating results;

•if our existing clients terminate their subscriptions or reduce their subscriptions and related usage, our revenues and gross margins will be harmed and we will be required to spend more money to grow our client base;

•we sell our solution to larger organizations that require longer sales and implementation cycles and often demand more configuration and integration services or customized features and functions that we may not offer, any of which could delay or prevent these sales and harm our growth rates, business and operating results;

•because a significant percentage of our revenue is derived from existing clients, downturns or upturns in new sales will not be immediately reflected in our operating results and may be difficult to discern;

2

•we rely on third-party telecommunications and internet service providers to provide our clients and their customers with telecommunication services and connectivity to our cloud contact center software and any failure by these service providers to provide reliable services could cause us to lose clients and subject us to claims for credits or damages, among other things;

•we have a history of losses and we may be unable to achieve or sustain profitability;

•the contact center software solutions market is subject to rapid technological change, and we must develop and sell incremental and new solutions in order to maintain and grow our business;

•we may not be able to secure additional financing on favorable terms, or at all, to meet our future capital needs;

•failure to comply with laws and regulations could harm our business and our reputation; and

•we may not have sufficient cash to service our convertible senior notes and repay such notes, if required.

The foregoing factors should not be construed as exhaustive and should be read together with the other cautionary statements included in this report. If one or more of these or other risks or uncertainties materialize, or if our underlying assumptions prove to be incorrect, our actual results may differ materially from what we anticipate. You should not place undue reliance on our forward-looking statements. Any forward-looking statements you read in this report reflect our views only as of the date of this report with respect to future events and are subject to these and other risks, uncertainties and assumptions relating to our operations, results of operations, growth strategy and liquidity. We undertake no obligation to update any forward-looking statements made in this report to reflect events or circumstances after the date of this report or to reflect new information or the occurrence of unanticipated events, except as required by law.

3

PART I. FINANCIAL INFORMATION

ITEM 1. Financial Statements

FIVE9, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except per share data)

	March 31, 2022		December 31, 2021
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	100,151	$	90,878
Marketable investments	377,519		378,980
Accounts receivable, net	77,912		83,731
Prepaid expenses and other current assets	32,534		30,342
Deferred contract acquisition costs, net	36,478		33,295
Total current assets	624,594		617,226
Property and equipment, net	91,476		77,785
Operating lease right-of-use assets	46,536		48,703
Intangible assets, net	36,950		39,897
Goodwill	165,420		165,420
Marketable investments	118,707		147,377
Other assets	11,748		11,871
Deferred contract acquisition costs, net — less current portion	92,964		84,663
Total assets	$	1,188,395	$	1,192,942
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	31,981	$	20,510
Accrued and other current liabilities	91,411		78,577
Operating lease liabilities	10,135		9,826
Accrued federal fees	1,650		2,282
Sales tax liabilities	2,047		2,660
Deferred revenue	46,564		43,720
Total current liabilities	183,788		157,575
Convertible senior notes	737,865		768,599
Sales tax liabilities — less current portion	883		877
Operating lease liabilities — less current portion	44,818		47,088
Other long-term liabilities	6,682		7,671
Total liabilities	974,036		981,810
Commitments and contingencies (Note 10)
Stockholders’ equity:
Common stock	70		68
Additional paid-in capital	480,215		439,787
Accumulated other comprehensive loss	(3,370)		(287)
Accumulated deficit	(262,556)		(228,436)
Total stockholders’ equity	214,359		211,132
Total liabilities and stockholders’ equity	$	1,188,395	$	1,192,942

See accompanying notes to the unaudited condensed consolidated financial statements.

4

FIVE9, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

AND COMPREHENSIVE LOSS

(Unaudited, in thousands, except per share data)

	Three Months Ended
	March 31, 2022		March 31, 2021
Revenue	$	182,777	$	137,882
Cost of revenue	88,867		59,803
Gross profit	93,910		78,079
Operating expenses:
Research and development	35,824		22,121
Sales and marketing	64,611		44,799
General and administrative	24,314		22,245
Total operating expenses	124,749		89,165
Loss from operations	(30,839)		(11,086)
Other (expense) income, net:
Interest expense	(1,870)		(1,938)
Interest income and other	845		175
Total other (expense) income, net	(1,025)		(1,763)
Loss before income taxes	(31,864)		(12,849)
Provision for (benefit from) income taxes	2,256		(517)
Net loss	$	(34,120)	$	(12,332)
Net loss per share:
Basic and diluted	$	(0.49)	$	(0.18)
Shares used in computing net loss per share:
Basic and diluted	68,974		66,721
Comprehensive Loss:
Net loss	$	(34,120)	$	(12,332)
Other comprehensive (loss) income	(3,083)		44
Comprehensive loss	$	(37,203)	$	(12,288)

See accompanying notes to the unaudited condensed consolidated financial statements.

5

FIVE9, INC.

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY

(Unaudited, in thousands)

	Common Stock			Additional Paid-In Capital		Accumulated Other Comprehensive Income (Loss)		Accumulated Deficit		Total Stockholders’ Equity
	Shares	Amount
Balance as of December 31, 2020	66,496	$	67	$	476,941	$	335	$	(198,179)	$	279,164
Cumulative effect adjustment due to adoption of ASU 2020-06(1)	—	—		(168,412)		—		22,743		(145,669)
Issuance of common stock upon partial conversion of the 2023 convertible senior notes	143	—		(143)		—		—		(143)
Partial unwind of capped calls and retirement of common stock related to the 2023 convertible senior notes	(19)	—		19		—		—		19
Issuance of common stock upon exercise of stock options	123	—		2,215		—		—		2,215
Issuance of common stock upon vesting of restricted stock units	286	—		—		—		—		—
Stock-based compensation	—	—		20,908		—		—		20,908
Other comprehensive income	—	—		—		44		—		44
Net loss	—	—		—		—		(12,332)		(12,332)
Balance as of March 31, 2021	67,029	$	67	$	331,528	$	379	$	(187,768)	$	144,206
Balance as of December 30, 2021	68,488	$	68	$	439,787	$	(287)	$	(228,436)	$	211,132
Issuance of common stock upon partial conversion of the 2023 convertible senior notes	540	—		(244)		—		—		(244)
Partial unwind of capped calls and retirement of common stock related to the 2023 convertible senior notes	(111)	—		2		—		—		2
Issuance of common stock upon exercise of stock options	281	1		1,276		—		—		1,277
Issuance of common stock upon vesting of restricted stock units	323	1		—		—		—		1
Stock-based compensation	—	—		39,394		—		—		39,394
Other comprehensive loss	—	—		—		(3,083)		—		(3,083)
Net loss	—	—		—		—		(34,120)		(34,120)
Balance as of March 31, 2022	69,521	$	70	$	480,215	$	(3,370)	$	(262,556)	$	214,359

(1)Effective January 1, 2021, the Company adopted ASU 2020-06, Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. Accordingly, the Company recorded a net reduction to opening accumulated deficit of $22.7 million and a net reduction to opening additional paid-in capital of $168.4 million as of January 1, 2021 due to the cumulative impact of adopting this new standard.

See accompanying notes to the unaudited condensed consolidated financial statements.

6

FIVE9, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited, in thousands)

	Three Months Ended
	March 31, 2022		March 31, 2021
Cash flows from operating activities:
Net loss	$	(34,120)	$	(12,332)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	10,795		8,763
Amortization of operating lease right-of-use assets	2,403		2,389
Amortization of deferred contract acquisition costs	8,678		5,540
Amortization of premium on marketable investments	700		1,682
Provision for doubtful accounts	222		160
Stock-based compensation	39,394		20,908
Amortization of discount and issuance costs on convertible senior notes	930		974
Deferred taxes	1,889		—
Change in fair of value of contingent consideration	260		2,500
Other	210		186
Changes in operating assets and liabilities:
Accounts receivable	5,566		(3,543)
Prepaid expenses and other current assets	(2,162)		(3,524)
Deferred contract acquisition costs	(20,160)		(15,983)
Other assets	234		101
Accounts payable	11,133		351
Accrued and other current liabilities	2,096		5,299
Accrued federal fees and sales tax liabilities	(1,239)		738
Deferred revenue	2,659		322
Other liabilities	(764)		(766)
Net cash provided by operating activities	28,724		13,765
Cash flows from investing activities:
Purchases of marketable investments	(105,277)		(163,683)
Proceeds from sales of marketable investments	600		—
Proceeds from maturities of marketable investments	130,821		120,182
Purchases of property and equipment	(12,398)		(8,229)
Capitalization of software development costs	(569)		—
Cash paid for an equity investment in a privately-held company	(2,000)		—
Net cash provided by (used in) investing activities	11,177		(51,730)
Cash flows from financing activities:
Repurchase of a portion of 2023 convertible senior notes, net of costs	(31,905)		(7,840)
Proceeds from exercise of common stock options	1,277		2,215
Payments of finance leases	—		(456)
Net cash used in financing activities	(30,628)		(6,081)
Net increase (decrease) in cash and cash equivalents	9,273		(44,046)
Cash and cash equivalents:
Beginning of period	90,878		220,372
End of period	$	100,151	$	176,326
Supplemental disclosures of cash flow data:
Cash paid for interest	$	—	$	13
Cash paid for income taxes	$	337	$	73
Non-cash investing and financing activities:
Equipment purchased and unpaid at period-end	$	22,365	$	7,515
Capitalization of leasehold improvements and furniture and fixtures through non-cash lease incentive	$	—	$	4,815

See accompanying notes to the unaudited condensed consolidated financial statements.

7

FIVE9, INC.

Notes to Condensed Consolidated Financial Statements (Unaudited)

1. Description of Business and Summary of Significant Accounting Policies

Five9, Inc. and its wholly-owned subsidiaries (the “Company”) is a provider of cloud software for contact centers. The Company was incorporated in Delaware in 2001 and is headquartered in San Ramon, California. The Company has offices in Europe, Asia and Australia, which primarily provide research, development, sales, marketing, and client support services.

Basis of Presentation

The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. All intercompany transactions and balances have been eliminated in consolidation.

Use of Estimates

The preparation of condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The significant estimates made by management affect revenue and related reserves, as well as the fair value of liabilities assumed through business combinations. Management periodically evaluates such estimates and they are adjusted prospectively based upon such periodic evaluation. Actual results could differ from those estimates.

Significant Accounting Policies

Except for the below significant accounting policy, which updates the significant accounting policies previously disclosed in our Annual Report on Form 10-K as filed with the SEC on February 28, 2022, there have been no material changes from the significant accounting policies previously disclosed in Part II, Item 8, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021.

Internal-use software development costs

The Company capitalizes certain qualifying costs incurred during the development stage of internal-use software. Costs related to preliminary project activities and post-implementation activities are expensed in research and development as incurred. Preliminary project activities include conceptual formulation, evaluation and final selection of alternatives, planning, proof of concept and requirement analysis of the selected alternative. Post-implementation stage begins when the inter-use software is ready for its intended use, and includes all internal and external training and application maintenance activities. Capitalized internal-use software costs are included within property and equipment, net on the condensed consolidated balance sheets, and are amortized over the estimated useful life of the software, which is typically three years. The related amortization expense is recognized in cost of revenue.

Recent Accounting Pronouncements Not Yet Effective

The Company has reviewed or is in the process of evaluating all issued, but not yet effective, accounting pronouncements and does not believe the future adoption of any such accounting pronouncements will cause a material impact on its condensed consolidated financial position, operating results or cash flows.

8

2. Revenue

Contract Balances

The following table provides information about accounts receivable, net, deferred contract acquisition costs, net, contract assets and contract liabilities from contracts with customers (in thousands):

	March 31, 2022		December 31, 2021
Accounts receivable, net	$	77,912	$	83,731
Deferred contract acquisition costs, net:
Current	$	36,478	$	33,295
Non-current	92,964		84,663
Total deferred contract acquisition costs, net	$	129,442	$	117,958
Contract assets and contract liabilities:
Contract assets (included in prepaid expenses and other current assets)	$	2,731	$	2,593
Contract liabilities (deferred revenue)	46,564		43,720
Noncurrent contract liabilities (deferred revenue) (included in other long-term liabilities)	1,913		2,097
Net contract liabilities	$	(45,746)	$	(43,224)

The Company receives payments from customers based upon billing cycles. Invoice payment terms are usually 30 days or less. Accounts receivable are recorded when the right to consideration becomes unconditional.

Deferred contract acquisition costs are recorded when incurred and are amortized over an estimated customer benefit period of five years.

The Company’s contract assets consist of unbilled amounts typically resulting from professional services revenue recognition when it exceeds the total amounts billed to the customer. The Company’s contract liabilities consist of advance payments and billings in excess of revenue recognized.

In the three months ended March 31, 2022, the Company recognized revenue of $26.2 million related to its contract liabilities at December 31, 2021.

Remaining Performance Obligations

As of March 31, 2022, the aggregate amount of the total transaction price allocated in contracts with original duration of greater than one year to the remaining performance obligations was $602.8 million. The Company expects to recognize revenue on approximately three-fourths of the remaining performance obligations over the next 24 months, with the balance recognized thereafter. The Company has elected the optional exemption, which allows for the exclusion of the amounts for remaining performance obligations that are part of contracts with an original expected duration of one year or less. Such remaining performance obligations represent unsatisfied or partially unsatisfied performance obligations pursuant to ASC 606.

3. Investments and Fair Value Measurements

Marketable Investments

9

The Company’s marketable investments have been classified and accounted for as available-for-sale. The Company’s marketable investments as of March 31, 2022 and December 31, 2021 were as follows (in thousands):

	March 31, 2022
Short-Term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	1,757	$	—	$	(3)	$	1,754
U.S. treasury	82,148		—		(365)		81,783
U.S. agency securities	145,428		—		(605)		144,823
Commercial paper	42,755		—		—		42,755
Municipal bonds	96,519		—		(457)		96,062
Corporate bonds	10,383		—		(41)		10,342
Total	$	378,990	$	—	$	(1,471)	$	377,519
	March 31, 2022
Long-term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	497	$	—	$	(8)	$	489
U.S. treasury	49,877		—		(1,061)		48,816
U.S. agency securities	63,969		—		(1,367)		62,602
Municipal bonds	6,944		—		(144)		6,800
Total	$	121,287	$	—	$	(2,580)	$	118,707

	December 31, 2021
Short-Term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	1,615	$	—	$	—	$	1,615
U.S. treasury	83,237		—		(24)		83,213
U.S. agency securities	159,070		—		(65)		159,005
Commercial paper	47,555		—		—		47,555
Municipal bonds	75,337		—		(96)		75,241
Corporate bonds	12,355		2		(6)		12,351
Total	$	379,169	$	2	$	(191)	$	378,980
	December 31, 2021
Long-term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	746	$	—	$	(2)	$	744
U.S. treasury	63,566		—		(251)		63,315
U.S. agency securities	63,960		—		(254)		63,706
Municipal bonds	18,655		—		(64)		18,591
Corporate bonds	1,026		—		(5)		1,021
Total	$	147,953	$	—	$	(576)	$	147,377

10

The following table presents the gross unrealized losses and the fair value for those marketable investments that were in an unrealized loss position for less than 12 months as of March 31, 2022 and December 31, 2021 (in thousands):

	March 31, 2022				December 31, 2021
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	(11)	$	2,243	$	(2)	$	2,010
U.S. treasury	(1,426)		125,714		(275)		140,527
U.S. agency securities	(1,972)		207,425		(320)		222,710
Municipal bonds	(601)		102,862		(160)		87,184
Corporate bonds	(41)		10,342		(10)		9,428
Total	$	(4,051)	$	448,586	$	(767)	$	461,859

Although the Company had certain available-for-sale debt securities in an unrealized loss position as of March 31, 2022, no impairment loss was recorded since it did not intend to sell them, did not anticipate a need to sell them, and the decline in fair value was not due to any credit-related factors.

The amortized cost and fair values of the Company’s marketable investments by contractual maturity as of March 31, 2022 and December 31, 2021 were as follows (in thousands):

	March 31, 2022				December 31, 2021
	Cost		Fair Value		Cost		Fair Value
Due within one year	$	378,990	$	377,519	$	379,169	$	378,980
Due after one year	121,287		118,707		147,953		147,377
Total	$	500,277	$	496,226	$	527,122	$	526,357

Fair Value Measurements

The Company carries cash equivalents and marketable investments at fair value. Fair value is based on the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

Level 1 — Observable inputs, which include unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2 — Observable inputs other than Level 1 inputs, such as quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 — Unobservable inputs that are supported by little or no market activity and that are based on management’s assumptions, including fair value measurements determined by using pricing models, discounted cash flow methodologies or similar techniques.

The Company determined the fair value of its Level 1 financial instruments, which are traded in active markets, using quoted market prices for identical instruments.

Marketable investments classified within Level 2 of the fair value hierarchy are valued based on other observable inputs, including broker or dealer quotations or alternative pricing sources. When quoted prices in active markets for identical assets or liabilities are not available, the Company relies on non-binding quotes from its investment managers, which are based on proprietary valuation models of independent pricing services. These models generally use inputs such as observable market data, quoted market prices for similar instruments, historical pricing trends of a security as relative to its peers. To validate the fair value determination provided by its investment managers, the Company reviews the pricing movement in the context of overall market trends and trading information from its investment managers. The Company performs routine procedures such as comparing prices obtained from independent source to ensure that appropriate fair values are recorded.

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The following tables set forth the Company’s assets measured at fair value by level within the fair value hierarchy (in thousands):

	March 31, 2022
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	21,311	$	—	$	—	$	21,311
U.S. agency securities and government sponsored securities	—		200		—		200
Total cash equivalents	$	21,311	$	200	$	—	$	21,511
Marketable investments (short and long term)
Certificates of deposit	$	—	$	2,243	$	—	$	2,243
U.S. treasury	130,599		—		—		130,599
U.S. agency securities and government sponsored securities	—		207,425		—		207,425
Commercial paper	—		42,755		—		42,755
Municipal bonds	—		102,862		—		102,862
Corporate bonds	—		10,342		—		10,342
Total marketable investments	$	130,599	$	365,627	$	—	$	496,226
Liabilities
Contingent consideration	$	—	$	—	$	24,000	$	24,000

	December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	31,380	$	—	$	—	$	31,380
Certificates of deposit	—		747		—		747
Total cash equivalents	$	31,380	$	747	$	—	$	32,127
Marketable investments (short and long-term)
Certificates of deposit	$	—	$	2,359	$	—	$	2,359
U.S. treasury	146,528		—		—		146,528
U.S. agency and government sponsored securities	—		222,711		—		222,711
Commercial paper	—		47,555		—		47,555
Municipal bonds	—		93,832		—		93,832
Corporate bonds	—		13,372		—		13,372
Total marketable investments	$	146,528	$	379,829	$	—	$	526,357
Liabilities
Contingent consideration	$	—	$	—	$	23,740	$	23,740

As of March 31, 2022 and December 31, 2021, the estimated fair value of the Company’s outstanding 2023 convertible senior notes was $6.2 million and $114.9 million, respectively. As of March 31, 2022 and December 31, 2021, the estimated fair value of the Company's outstanding 2025 convertible senior notes was $812.1 million and $917.3 million, respectively. The fair values were determined based on the quoted price of the convertible senior notes in an inactive market on the last trading day of the reporting period and have been classified as Level 2 in the fair value hierarchy. See Note 6 for further information on the Company’s convertible senior notes.

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As part of the agreement to acquire Inference Solutions Inc. ("Inference") in November 2020, the Company was obligated to pay contingent earn out consideration of up to $24.0 million based upon achievement of certain milestones and relative thresholds during the earn out measurement period which ended on December 31, 2021. The fair value of the contingent consideration arrangement was classified within Level 3 and was determined using a probability-based scenario analysis approach. The resulting probability-weighted contingent consideration amounts were discounted based on the Company’s estimated cost of debt. During the three months ended March 31, 2022, the Company concluded that the final contingent consideration amount was $24.0 million and recognized an additional $0.3 million of contingent consideration expense to adjust the fair value from $23.7 million at December 31, 2021 to $24.0 million at March 31, 2022. The Company paid the $24.0 million earn out consideration in April 2022.

A reconciliation of the beginning and ending balance for contingent consideration consisted of the following (in thousands):

	Three Months Ended March 31, 2022
Balance, beginning of period	$	23,740
Change in fair value of contingent consideration	260
Balance, end of period	$	24,000

In February 2022, the Company made a $2.0 million equity investment in a privately-held company that it does not have the ability to exercise significant influence over. The Company elected the measurement alternative for an equity security without a readily determinable fair value. Accordingly, this investment will be accounted for at its cost minus impairment, if any, and is classified within Level 3. If the Company identifies observable price changes in orderly transactions for such investment or a similar investment, it will measure the investment at fair value as of the date that the observable transaction occurred.

Except for the $2.0 million equity investment described above, there were no assets or liabilities measured at fair value on a non-recurring basis as of March 31, 2022 and December 31, 2021.

The fair value of the Company’s other financial instruments’ fair value, including accounts receivable, accounts payable and other current liabilities, approximate their carrying value due to the relatively short maturity of those instruments. The carrying amounts of the Company’s operating leases approximate their fair value, which is the present value of expected future cash payments based on assumptions about current interest rates and the creditworthiness of the Company.

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4. Financial Statement Components

Cash and cash equivalents consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Cash	$	78,640	$	58,751
Certificates of deposit	—		747
Money market funds	21,311		31,380
U.S. agency securities	200		—
Total cash and cash equivalents	$	100,151	$	90,878

Accounts receivable, net consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Trade accounts receivable	$	66,538	$	75,970
Unbilled trade accounts receivable, net of advance client deposits	11,607		7,981
Allowance for doubtful accounts	(233)		(220)
Accounts receivable, net	$	77,912	$	83,731

Prepaid expenses and other current assets consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Prepaid expenses	$	24,717	$	21,306
Other current assets	5,086		6,443
Contract assets	2,731		2,593
Prepaid expenses and other current assets	$	32,534	$	30,342

Property and equipment, net consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Computer and network equipment	$	136,645	$	116,701
Computer software	44,645		44,268
Internal-use software development costs	1,069		500
Furniture and fixtures	4,044		3,953
Leasehold improvements	6,032		5,914
Property and equipment	192,435		171,336
Accumulated depreciation and amortization	(100,959)		(93,551)
Property and equipment, net	$	91,476	$	77,785

Depreciation and amortization expense associated with property and equipment was $7.8 million and $5.8 million for the three months ended March 31, 2022 and 2021, respectively.

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Property and equipment capitalized under finance lease obligations consists primarily of computer and network equipment and was as follows (in thousands):

	March 31, 2022		December 31, 2021
Gross	$	42,541	$	42,541
Less: accumulated depreciation and amortization	(42,022)		(41,689)
Total	$	519	$	852

Other assets consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Other assets	$	4,730	$	4,964
Equity investment	2,000		—
Deferred tax assets	5,018		6,907
Total	$	11,748	$	11,871

Accrued and other current liabilities consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Accrued expenses	$	22,764	$	20,108
Accrued compensation and benefits	44,647		34,729
Contingent consideration	24,000		23,740
Accrued and other current liabilities	$	91,411	$	78,577

Other long-term liabilities consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Deferred revenue	$	1,913	$	2,097
Other long-term liabilities	4,769		5,574
Other long-term liabilities	$	6,682	$	7,671

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5. Goodwill and Intangible Assets

Goodwill

There was no activity in the Company's goodwill balance during the three months ended March 31, 2022.

Intangible Assets

The following table summarizes the activity in the Company's intangible assets balance during the three months ended March 31, 2022 (in thousands):

	Three Months Ended March 31, 2022
Beginning of the period	$	39,897
Amortization	(2,947)
End of the period	$	36,950

The components of intangible assets were as follows (in thousands):

	March 31, 2022							December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Amortization period (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Amortization period (Years)
Developed technology	$	56,214	$	(20,586)	$	35,628	3.8	$	56,214	$	(17,821)	$	38,393	4.0
Acquired workforce	470		(373)		97		0.9	470		(334)		136		0.9
Customer relationships	1,600		(501)		1,099		3.5	1,600		(421)		1,179		3.7
Trademarks	500		(374)		126		0.7	500		(311)		189		0.9
Total	$	58,784	$	(21,834)	$	36,950	3.8	$	58,784	$	(18,887)	$	39,897	4.0

Amortization expense for intangible assets was $2.9 million and $2.9 million during the three months ended March 31, 2022 and 2021, respectively.

As of March 31, 2022, the expected future amortization expense for intangible assets was as follows (in thousands):

Period	Expected Future Amortization Expense
Remaining 2022	$	8,758
2023	10,870
2024	7,527
2025	5,595
2026	4,200
Thereafter	—
Total	$	36,950

6. Debt

2025 Convertible Senior Notes and Related Capped Call Transactions

In May and June 2020, the Company issued $747.5 million aggregate principal amount of 2025 convertible senior notes in a private offering, which aggregate principal amount included the exercise in full of the initial purchasers’ option to purchase up to an additional $97.5 million principal amount of the 2025 convertible senior

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notes. The 2025 convertible senior notes mature on June 1, 2025 and bear interest at a fixed rate of 0.500% per annum, payable semiannually in arrears on June 1 and December 1 of each year, beginning on December 1, 2020. In addition, under the terms of the 2025 convertible senior notes, the Company was obligated to pay additional interest on the 2025 convertible senior notes at a rate equal to 0.500% per annum for the period from June 13, 2021 through July 8, 2021, after which such additional interest is no longer payable. The total net proceeds from the issuance of the 2025 convertible senior notes, after deducting initial purchasers' discounts and commissions and estimated debt issuance costs, were approximately $728.8 million.

Each $1,000 principal amount of the 2025 convertible senior notes is initially convertible into 7.4437 shares of the Company’s common stock (the “2025 Conversion Option”), which is equivalent to an initial conversion price of approximately $134.34 per share of common stock, subject to adjustment upon the occurrence of specified events. The initial conversion price represents a premium of approximately 30% to the $103.34 per share closing price of the Company’s common stock on The Nasdaq Global Market on May 21, 2020. The 2025 convertible senior notes are convertible, in multiples of $1,000 principal amount, at the option of the holders prior to the close of business on the business day immediately preceding March 1, 2025, only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on September 30, 2020 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “2025 Measurement Period”) in which the trading price (as defined in the 2025 Indenture governing the 2025 convertible senior notes) per $1,000 principal amount of the 2025 convertible senior notes for each trading day of the 2025 Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate in effect on each such trading day; (3) if the Company calls any or all of the 2025 convertible senior notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after March 1, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their 2025 convertible senior notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances. 

Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock, at the Company’s election. If the Company undergoes a fundamental change (as defined in the indenture governing the 2025 convertible senior notes), subject to certain conditions, holders may require the Company to repurchase for cash all or any portion of their 2025 convertible senior notes, in principal amounts of $1,000 or a multiple thereof, at a fundamental change repurchase price equal to 100% of the principal amount of the 2025 convertible senior notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the fundamental change repurchase date. In addition, following certain corporate events or if the Company issues a notice of redemption, it will, under certain circumstances, increase the conversion rate for holders who elect to convert their notes in connection with such corporate event or during the relevant redemption period.

There have been no changes to the initial conversion price of the 2025 convertible senior notes since issuance. The closing market price of the Company's common stock of $110.40 per share on March 31, 2022, the last trading day during the three months ended March 31, 2022, was below $174.64 per share, which represents 130% of the initial conversion price of $134.34 per share. Additionally, the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day, March 31, 2022, was not greater than or equal to 130% of the initial conversion price. As such, during the three months ended March 31, 2022, the conditions allowing holders of the 2025 convertible senior notes to convert were not met. The 2025 convertible senior notes are therefore not convertible for the three months ending June 30, 2022.

The Company may not redeem the 2025 convertible senior notes prior to June 6, 2023. The Company may redeem for cash all or any portion of the 2025 convertible senior notes, at its option, on or after June 6, 2023 and prior to March 1, 2025 if the last reported sale price of its common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending not more than two trading days immediately preceding the date on which the Company provides notice of redemption at a redemption price equal to 100% of the principal amount of the 2025 convertible senior notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. No sinking fund is provided for the 2025 convertible senior notes.

The 2025 convertible senior notes are the Company’s senior unsecured obligations and rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the 2025

17

convertible senior notes; equal in right of payment to any of the Company’s unsecured indebtedness that is not so subordinated (including the 2023 convertible senior notes); effectively junior in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of the Company’s subsidiaries.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the issuance of the 2025 convertible senior notes, the 2025 convertible senior notes were separated into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated conversion feature. The carrying amount of the equity component representing the 2025 Conversion Option was $158.3 million and was determined by deducting the fair value of the liability component from the par value of the 2025 convertible senior notes. The equity component was recorded in additional paid-in-capital and was not re-measured as long as it continued to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount (the “Debt Discount”) was amortized to interest expense over the contractual term of the 2025 convertible senior notes at an effective interest rate of 5.76%.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the debt issuance costs of $18.7 million related to the 2025 convertible senior notes, the Company allocated the total amount incurred to the liability and equity components of the 2025 convertible senior notes based on their relative values. Issuance costs attributable to the liability component were $14.7 million and were amortized to interest expense using the effective interest method over the contractual term of the 2025 convertible senior notes. Issuance costs attributable to the equity component were netted with the equity component in additional paid-in-capital.

On January 1, 2021, the Company elected to early adopt ASU 2020-06 based on a modified retrospective transition method. Under such transition, prior-period information has not been retrospectively adjusted.

In accounting for the 2025 convertible senior notes after adoption of ASU 2020-06, the 2025 convertible senior notes are accounted for as a single liability, and the carrying amount of the 2025 convertible senior notes is $735.6 million as of March 31, 2022, with principal of $747.5 million, net of issuance cost of $11.9 million. The 2025 senior convertible notes were classified as long term liabilities as of March 31, 2022. The issuance cost related to the 2025 convertible senior notes is being amortized to interest expense over the contractual term of the 2025 convertible senior notes at an effective interest rate of 1.0%.

The net carrying amount of the 2025 convertible senior notes as of March 31, 2022 and as of December 31, 2021 was as follows (in thousands):

	March 31, 2022		December 31, 2021
Principal	$	747,500	$	747,500
Unamortized issuance costs	(11,936)		(12,835)
Net carrying amount	$	735,564	$	734,665

Interest expense related to the 2025 convertible senior notes was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Contractual interest expense	$	934	$	934
Amortization of issuance costs	899		890
Total interest expense	$	1,833	$	1,824

In connection with the issuance of the 2025 convertible senior notes, the Company entered into privately negotiated capped call transactions (the “2025 Capped Call Transactions”) with certain financial institutions. The 2025 Capped Call Transactions are expected generally to reduce the potential dilution to the Company’s common stock in connection with any conversion of the 2025 convertible senior notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted 2025 convertible senior notes, as the case may be, with such reduction and/or offset subject to a cap based on the cap price. The initial cap price of the 2025 Capped Call Transactions was $206.68 per share and is subject to certain adjustments under the terms of the 2025 Capped Call Transactions. The 2025 Capped Call Transactions cover, subject to anti-dilution adjustments, approximately 5.6 million shares of the Company’s common stock. For accounting purposes, the 2025 Capped Call Transactions are separate transactions, and not integrated with the issuance of the 2025 convertible senior notes. As these transactions meet certain accounting criteria, the 2025 Capped Call Transactions are recorded in stockholders’ equity and are not accounted for as derivatives. The cost to the Company of the 2025 Capped Call Transactions was

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$90.5 million during the year ended December 31, 2020, which was recorded as a reduction to additional paid-in capital.

Maturity of the Company’s 2025 convertible senior notes as of March 31, 2022 was as follows (in thousands):

Period	Amount to Mature
2025 (Maturity date of June 1, 2025)	$	747,500
Total	$	747,500

2023 Convertible Senior Notes and Related Capped Call Transactions

In May 2018, the Company issued $258.8 million aggregate principal amount of the 2023 convertible senior notes in a private offering. The 2023 convertible senior notes mature on May 1, 2023 and bear interest at a fixed rate of 0.125% per annum, payable semiannually in arrears on May 1 and November 1 of each year. The total net proceeds from the offering, after deducting initial purchasers' discounts and commissions and estimated debt issuance costs, was approximately $250.8 million.

In May 2020, the Company used part of the net proceeds from the issuance of the 2025 convertible senior notes to repurchase, exchange or otherwise retire approximately $181.0 million aggregate principal amount of the 2023 convertible senior notes in privately-negotiated transactions for aggregate consideration of $449.6 million, consisting of $181.0 million in cash and 2,723,581 shares of the Company’s common stock (the "2023 Note Repurchase Transactions").

As of March 31, 2022, after giving effect to the 2023 Note Repurchase Transactions and other settlements upon conversion requests, approximately $2.3 million aggregate principal amount of 2023 convertible senior notes remained outstanding.

Each $1,000 principal amount of the 2023 convertible senior notes was initially convertible into 24.4978 shares of the Company’s common stock (the “2023 Conversion Option”), which is equivalent to an initial conversion price of approximately $40.82 per share of common stock, subject to adjustment upon the occurrence of specified events. The 2023 convertible senior notes are convertible, in multiples of $1,000 principal amount, at the option of the holders at any time prior to the close of business on the business day immediately preceding November 1, 2022, only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ended on September 30, 2018 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “2023 Measurement Period”) in which the trading price (as defined in the indenture governing the 2023 convertible senior notes) per $1,000 principal amount of the 2023 convertible senior notes for each trading day of the 2023 Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate in effect on each such trading day; (3) if the Company calls any or all of the 2023 convertible senior notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after November 1, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their 2023 convertible senior notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances. 

Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock, at the Company’s election. If the Company undergoes a fundamental change (as defined in the indenture governing the 2023 convertible senior notes), subject to certain conditions, holders may require the Company to repurchase for cash all or any portion of their 2023 convertible senior notes, in principal amounts of $1,000 or a multiple thereof, at a fundamental change repurchase price equal to 100% of the principal amount of the 2023 convertible senior notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the fundamental change repurchase date. In addition, following certain corporate events that occur prior to the maturity date or if the Company issues a notice of redemption, it will, under certain circumstances, increase the conversion rate for holders who elect to convert their 2023 convertible senior notes in connection with such corporate event or during the relevant redemption period.

There have been no changes to the initial conversion price of the 2023 convertible senior notes since issuance. During each of the quarters from the third quarter of 2019 through the first quarter of 2022, one of the triggers for convertibility of the 2023 convertible senior notes was triggered as the last reported sale price of the Company’s

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common stock was greater than $53.07 per share, which represents 130% of the initial conversion price of $40.82 per share, for at least 20 trading days in the period of 30 consecutive trading days ended on, and including, the last trading day of the quarter for each quarter of 2020 and 2021 and for the first quarter of 2022. As a result, the 2023 convertible senior notes were convertible, in multiples of $1,000 principal amount, at the option of the 2023 convertible senior note holders between October 1, 2019 to March 31, 2022, and are also currently convertible between April 1, 2022 to June 30, 2022. Whether the 2023 convertible senior notes will be convertible after June 30, 2022 will depend on the continued satisfaction of this condition or other conversion conditions in the future. During the three months ended March 31, 2022, the Company paid $31.9 million in cash and issued 540,130 shares of its common stock to settle aggregate principal amount of $31.9 million of its 2023 convertible senior notes. As of March 31, 2022, approximately $2.3 million aggregate principal amount of our 2023 convertible senior notes remained outstanding. The conversions that occurred during the three months ended March 31, 2022 were subject to ASU 2020-06 and such conversions were accounted for as contractual conversions, which did not result in any gain or loss upon their settlement.

During the three months ended March 31, 2022, the Company received an additional 111,416 shares from the partial unwind of capped calls resulting from the settlement of its 2023 convertible senior notes. The receipt of the 111,416 shares reduced the number of shares of common stock outstanding.

In addition, on or prior to March 31, 2022, the Company received elections to convert aggregate principal amount of $2.1 million of its 2023 convertible senior notes that remain unsettled as of the end of the first quarter of 2022. The Company expects to settle these conversions in cash or a combination of cash and shares during the second quarter of 2022. The Company has the option to settle any future election conversion notices in cash, shares, or a combination of cash and shares.

The 2023 convertible senior notes are the Company’s senior unsecured obligations and rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the 2023 convertible senior notes; equal in right of payment to any of the Company’s unsecured indebtedness that is not so subordinated (including the 2025 convertible senior notes); effectively junior in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of the Company’s subsidiaries.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the issuance of the 2023 convertible senior notes, the 2023 convertible senior notes were separated into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated conversion feature. The equity component was recorded in additional paid-in-capital and was not re-measured as long as it continued to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount (the "Debt Discount") was amortized to interest expense over the contractual term of the 2023 convertible senior notes at an effective interest rate of 6.39%.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the debt issuance costs of $8.0 million related to the 2023 convertible senior notes, the Company allocated the total amount incurred to the liability and equity components of the 2023 convertible senior notes based on their relative values. Issuance costs attributable to the liability component were $6.0 million and were amortized to interest expense using the effective interest method over the contractual term of the 2023 convertible senior notes. Issuance costs attributable to the equity component were netted with the equity component in additional paid-in-capital.

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After the adoption of ASU 2020-06, the 2023 convertible senior notes are accounted for as a single liability, and the carrying amount of the 2023 convertible senior notes was $2.3 million as of March 31, 2022, with principal of $2.3 million, net of issuance cost of $0.0 million. The 2023 senior convertible notes were classified as long term liabilities during the three months ended on March 31, 2022. The issuance cost related to the 2023 convertible senior notes is being amortized to interest expense over the contractual term of the 2023 convertible senior notes at an effective interest rate of 0.76%.

The net carrying amount of the 2023 convertible senior notes as of March 31, 2022 and as of December 31, 2021 was as follows (in thousands):

	March 31, 2022		December 31, 2021
Principal	$	2,317	$	34,225
Unamortized issuance costs	(16)		(291)
Net carrying amount	$	2,301	$	33,934

Interest expense related to the 2023 convertible senior notes was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Contractual interest expense	$	6	$	17
Amortization of issuance costs	31		84
Total interest expense	$	37	$	101

In connection with the issuance of the 2023 convertible senior notes, the Company entered into privately negotiated capped call transactions (the “2023 Capped Call Transactions”) with certain financial institutions. The 2023 Capped Call Transactions are expected generally to reduce the potential dilution to the Company’s common stock upon any conversion of the 2023 convertible senior notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted 2023 convertible senior notes, as the case may be, with such reduction and/or offset subject to a cap based on the cap price. The initial cap price of the 2023 Capped Call Transactions was $62.80 per share, and is subject to certain adjustments under the terms of the 2023 Capped Call Transactions. The 2023 Capped Call Transactions cover, subject to anti-dilution adjustments, approximately 6.3 million shares of the Company’s common stock. For accounting purposes, the 2023 Capped Call Transactions are separate transactions, and not integrated with the issuance of the 2023 convertible senior notes. As these transactions meet certain accounting criteria, the 2023 Capped Call Transactions are recorded in stockholders’ equity and are not accounted for as derivatives. The cost of $31.4 million incurred in connection with the 2023 Capped Call Transactions was recorded as a reduction to additional paid-in capital.

In connection with the 2023 Note Repurchase Transactions, the Company amended the 2023 Capped Call Transactions such that the portion associated with the 2023 convertible senior notes subject to the 2023 Note Repurchase Transactions would remain outstanding notwithstanding the retirement of $181.0 million aggregate principal amount of 2023 convertible senior notes. Following such amendment, the 2023 Capped Call Transactions continue to meet the accounting criteria to be recorded in stockholders’ equity and are not accounted for as derivatives.

Maturity of the Company’s 2023 convertible senior notes as of March 31, 2022 was as follows (in thousands):

Period	Amount to Mature
2023 (Maturity date of May 1, 2023)	$	2,317
Total	$	2,317

See Note 6 of the notes to consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 filed with the Securities and Exchange Commission on February 28, 2022 for further description of the convertible senior notes.

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7. Stockholders’ Equity

Capital Structure

Common Stock

The Company is authorized to issue 450,000,000 shares of common stock with a par value of $0.001 per share. As of March 31, 2022 and December 31, 2021, the Company had 69,521,562 and 68,488,337 shares of common stock issued and outstanding, respectively. During the three months ended March 31, 2022, the Company issued 540,130 shares of common stock in connection with 2023 convertible senior note settlements. During the three months ended March 31, 2022, the Company also received 111,416 shares from the partial unwind of capped calls resulting from the settlement of its 2023 convertible senior notes. The receipt of the 111,416 shares during the three months ended March 31, 2022 reduced the number of shares of common stock outstanding.

Preferred Stock

The Company is authorized to designate and issue up to 5,000,000 shares of preferred stock with a par value of $0.001 per share in one or more series without stockholder approval and to fix the rights, preferences, privileges and restrictions thereof. As of March 31, 2022 and December 31, 2021, there were no shares of preferred stock issued and outstanding.

Common Stock Reserved for Future Issuance

Shares of common stock reserved for future issuance related to outstanding equity awards and employee equity incentive plans were as follows (in thousands):

	March 31, 2022
Stock options outstanding	1,768
RSUs (including PRSUs) outstanding	3,236
Shares available for future grant under 2014 Plan	15,736
Shares available for future issuance under ESPP	3,761
Total shares of common stock reserved	24,501

Stock Options

A summary of the Company’s stock option activity during the three months ended March 31, 2022 is as follows (in thousands, except years and per share data):

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding as of December 31, 2021	1,982	$	38.65
Options granted (weighted average grant date fair value of $54.82 per share)	78	110.39
Options exercised	(281)	4.54
Options forfeited or expired	(11)	110.05
Outstanding as of March 31, 2022	1,768	$	46.78	2.6	$	123,988

The aggregate intrinsic value amounts are computed based on the difference between the exercise price of the stock options and the fair market value of the Company’s common stock of $110.40 per share as of March 31, 2022 for all in-the-money stock options outstanding.

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Restricted Stock Units (including Performance-Based Restricted Stock Units)

A summary of the Company’s restricted stock unit ("RSU"), activity during the three months ended March 31, 2022 is as follows (in thousands, except per share data):     

	Number of Shares	Weighted Average Grant Date Fair Value Per Share
Outstanding as of December 31, 2021	2,560	$	125.65
RSUs granted(1)	1,072	112.03
RSUs vested and released	(323)	105.70
RSUs forfeited or canceled	(73)	123.68
Outstanding as of March 31, 2022	3,236	123.18

(1) Includes 59,383 PRSUs granted during the first quarter of 2022.

Performance-Based Restricted Stock Units

During the first quarter of 2022, the Company granted 59,383 performance-based restricted stock units (“PRSUs”), with a weighted average grant date fair value of $8.3 million, as part of its annual grant of equity incentive awards to certain executives. The amount that may be earned pursuant to the PRSUs ranges from 0% to 200% of the target number based on the Company’s relative total shareholder return (“RTSR”) performance as compared to the companies in the S&P Software and Services Select Index during three one-year performance periods consisting of the Company’s 2022, 2023 and 2024 fiscal years. One-third of the total PRSUs may be earned and settled in shares following the end of each one-year performance period based on RTSR performance and subject to continued employment through the payment date, but the amount initially paid for 2022 and 2023 is limited to 100% of the target amount for the year, and any PRSUs resulting from above-target performance in those years will be paid following the end of 2024, subject to the executive’s continued employment through the payment date. If the Company’s absolute total shareholder return for any performance period is negative, then no more than 100% of the target amount of PRSUs for such period may be earned. If an executive's employment with the Company terminates before the end of 2024 due to death or disability, 100% (if due to death) or 50% (if due to disability) of the unvested PRSUs may be earned subject to ultimate RTSR performance in each remaining performance period. Upon a qualifying termination of employment in connection with a change in control of the Company, the unvested PRSUs will vest on a double-trigger basis at the target level. The fair value of the PRSUs, which are subject to market and service conditions, are determined on their grant date using a Monte Carlo Simulation model based upon assumptions presented below. The Company recognizes the fair value of the PRSUs ratably over their requisite service period.

Stock-Based Compensation

Stock-based compensation expense was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cost of revenue	$	7,793	$	3,105
Research and development	10,145		4,763
Sales and marketing	13,424		6,771
General and administrative	8,032		6,269
Total stock-based compensation	$	39,394	$	20,908

As of March 31, 2022, unrecognized stock-based compensation expense by award type and their expected weighted-average recognition periods are summarized in the following table (in thousands, except years).

	Stock Option		RSU		PRSU		ESPP
Unrecognized stock-based compensation expense	$	22,048	$	366,400	$	7,847	$	861
Weighted-average amortization period	2.6 years		2.8 years		2.8 years		0.1 years

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The weighted-average assumptions used to value stock options and PRSUs granted during the periods presented were as follows:

Stock Options	Three Months Ended
	March 31, 2022		March 31, 2021
Expected term (years)	6.0		6.0
Volatility	46.0	%	47.0	%
Risk-free interest rate	1.8	%	1.0	%
Dividend yield (1)	—		—
PRSUs	Three Months Ended
	March 31, 2022		March 31, 2021
Closing price of common stock as of grant date (February 28, 2022)	$110.00		—
Expected term (years)	2.84		—
Volatility	48.8	%	—
Risk-free interest rate	1.6	%	—
Dividend yield (1)	—		—

(1)The Company has not paid, and does not anticipate paying, cash dividends on its shares of common stock. Accordingly, the expected dividend yield is zero.

8. Net Loss Per Share

Basic net loss per share is calculated by dividing net loss by the weighted average number of shares of common stock outstanding during the period, and excludes any dilutive effects of employee stock-based awards and potential shares upon conversion of the convertible senior notes. Diluted net loss per share is computed giving effect to all potentially dilutive shares of common stock, including common stock issuable upon exercise of stock options, vesting of RSUs and PRSUs, and shares of common stock issuable upon conversion of convertible senior notes. As the Company had net losses for the three months ended March 31, 2022 and 2020, all potentially issuable shares of common stock were determined to be anti-dilutive.

The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data):

	Three Months Ended
	March 31, 2022		March 31, 2021
Net loss	$	(34,120)	$	(12,332)
Weighted-average shares used in computing basic and diluted net loss per share	68,974		66,721
Basic and diluted net loss per share	$	(0.49)	$	(0.18)

The following securities were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive (in thousands):

	Three Months Ended
	March 31, 2022	March 31, 2021
Stock options	1,768	2,244
RSUs (includes PRSUs)	3,236	2,515
Convertible senior notes	6,042	6,884
Total	11,046	11,643

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The Company used the if-converted method for calculating any potential dilutive effect of its convertible senior notes for the three months ended March 31, 2022 and 2021. Under this method, the Company calculates diluted earnings per share under both the cash and share settlement assumptions to determine which is more dilutive. If share settlement is more dilutive, the Company calculates diluted earnings per share assuming that all of the convertible senior notes were converted solely into shares of common stock at the beginning of the reporting period. The potential impact upon the conversion of the convertible senior notes were excluded from the calculation of diluted net loss per share for the three months ended March 31, 2022 and 2021 because the effect would have been anti-dilutive.

9. Income Taxes

The provision for (benefit from) income taxes for the three months ended March 31, 2022 and 2021 was approximately $2.3 million and $(0.5) million, respectively. The provision for income taxes for the three months ended March 31, 2022 consisted primarily of foreign income tax expense from the intercompany sale of the Company's Australian intellectual property to the United States. The benefit from income taxes for the three months ended March 31, 2021 consisted primarily of foreign income tax benefit offset by domestic state minimum taxes.

For the three months ended March 31, 2022, the provision for income taxes differed from the statutory amount primarily due to foreign income taxes and the Company realizing no benefit for current year domestic losses due to maintaining a full valuation allowance against its domestic net deferred tax assets. For the three months ended March 31, 2021, the benefit from income taxes differed from the statutory amount primarily due to state and foreign income taxes and the Company realizing no benefit for current year domestic losses due to maintaining a full valuation allowance against its domestic net deferred tax assets.

The realization of tax benefits of deferred tax assets is dependent upon future levels of taxable income, of an appropriate character, in the periods the items are expected to be deductible or taxable. Based on the available objective evidence, the Company does not believe it is more likely than not that the net deferred tax assets will be realizable. Accordingly, the Company has provided a full valuation allowance against the domestic net deferred tax assets as of March 31, 2022 and December 31, 2021. The Company intends to maintain the remaining valuation allowance until sufficient positive evidence exists to support a reversal of, or decrease in, the valuation allowance. During the three months ended March 31, 2022, there were no material changes to the total amount of unrecognized tax benefits.

10. Commitments and Contingencies

Commitments

The Company’s principal commitments consist of future payment obligations under its convertible senior notes, finance leases to finance data centers and other computer and networking equipment purchases, operating leases for office facilities, cloud services agreement, and agreements with third parties to provide co-location hosting, telecommunication usage and equipment maintenance services. These commitments as of December 31, 2021 are disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, and did not change materially during the three months ended March 31, 2022, except for certain hosting and telecommunications agreements, cloud service agreements, the convertible senior notes, the contingent consideration described in Note 3, and the operating leases described in Note 12.

As of March 31, 2022, the Company’s commitment under various hosting and telecommunications agreements totaled $19.5 million for terms ranging up to 60 months. These agreements require the Company to make monthly payments over the service term in exchange for certain network services.

As of March 31, 2022, we had outstanding cloud service agreement commitments totaling $55.4 million, of which $12.6 million is expected to be paid in the remainder of 2022 and the remaining $42.8 million in 2023.

As of March 31, 2022, $749.8 million of aggregate principal of the convertible senior notes were outstanding. The 2023 convertible senior notes and the 2025 convertible senior notes are due on May 1, 2023 and June 1, 2025, respectively. See Note 6 for more information concerning the convertible senior notes.

Legal Matters

The Company is involved in various legal and regulatory matters arising in the normal course of business. In management’s opinion, resolution of these matters is not expected to have a material impact on the Company’s consolidated results of operations, cash flows, or its financial position. However, due to the uncertain nature of legal

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matters, an unfavorable resolution of a matter could materially affect the Company’s future consolidated results of operations, cash flows or financial position in a particular period. The Company expenses legal fees as incurred.

Indemnification Agreements

In the ordinary course of business, the Company enters into agreements of varying scope and terms pursuant to which it agrees to indemnify clients, vendors, lessors, business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, including breach of security, services to be provided by the Company or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with its directors, officers and certain employees that requires it, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees. There are no claims that the Company is aware of that could have a material effect on the consolidated balance sheet, consolidated statement of operations and comprehensive loss, or consolidated statements of cash flows.

11. Geographical Information

The following table summarizes revenues by geographic region based on client billing address (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
United States	$	167,247	$	125,886
International	15,530		11,996
Total revenue	$	182,777	$	137,882

The following table summarizes total property and equipment, net in the respective locations (in thousands):

	March 31, 2022		December 31, 2021
United States	$	82,645	$	68,674
International	8,831		9,111
Property and equipment, net	$	91,476	$	77,785

12. Leases

The Company has leases for offices, data centers and computer and networking equipment that expire at various dates through 2031. The Company’s leases have remaining terms of one to ten years, some of the leases include a Company option to extend the leases for up to three to five years, and some of the leases include the option to terminate the leases upon 30-days notice. The Company has elected the practical expedient to not separate lease and non-lease components for real estate operating leases.

The components of lease expenses were as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Operating lease cost	$	2,900	$	2,668
Finance lease cost:
Amortization of right-of-use assets	$	333	$	717
Interest on finance lease liabilities	—		13
Total finance lease cost	$	333	$	730

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Supplemental cash flow information related to leases was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash used in operating leases	$	(2,709)	$	(2,038)
Financing cash used in finance leases	—		(456)
Right of use assets obtained in exchange for lease obligations:
Operating leases	236		38,339
Finance leases	—		—

Supplemental balance sheet information related to leases was as follows (in thousands):

	March 31, 2022		December 31, 2021
Operating leases
Operating lease right-of-use assets	$	46,536	$	48,703
Operating lease liabilities	$	10,135	$	9,826
Operating lease liabilities — less current portion	44,818		47,088
Total operating lease liabilities	$	54,953	$	56,914
Finance leases
Property and equipment, gross	$	42,541	$	42,541
Less: accumulated depreciation and amortization	(42,022)		(41,689)
Property and equipment, net	$	519	$	852

Weighted average remaining terms were as follows (in years):

	March 31, 2022	December 31, 2021
Weighted average remaining lease term
Operating leases	7.1	7.3

Weighted average discount rates were as follows:

	March 31, 2022		December 31, 2021
Weighted average discount rate
Operating leases	3.2	%	3.2	%

Maturities of lease liabilities were as follows (in thousands):

Year Ending December 31,	Operating Leases
Remaining 2022	$	8,744
2023	10,739
2024	7,870
2025	5,613
2026	5,773
Thereafter	22,875
Total future minimum lease payments	61,614
Less: imputed interest	(6,661)
Total	$	54,953

As of March 31, 2022, the Company entered into an additional data center operating lease that had not yet commenced, representing a total commitment over its term of $0.3 million. This data center lease commenced on April 1, 2022, with a lease term of three years.

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ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion in conjunction with the condensed consolidated financial statements and notes thereto included elsewhere in this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the year ended December 31, 2021.

Overview

We are a pioneer and leading provider of intelligent cloud software for contact centers, facilitating more than nine billion call minutes between our more than 2,500 clients and their customers per year. We believe we achieved this leadership position through our expertise and technology, which has empowered us to help organizations of all sizes transition from legacy on-premise contact center systems to our cloud solution. Our solution, comprised of our Virtual Contact Center, or VCC, cloud platform and applications, allows simultaneous management and optimization of customer interactions across voice, chat, email, web, social media and mobile channels, either directly or through our application programming interfaces, or APIs. Our VCC cloud platform matches each customer interaction with an appropriate agent resource and delivers relevant customer data to the agent in real-time through integrations with adjacent enterprise applications, such as customer relationship management, or CRM, software, to optimize the customer experience and improve agent productivity. Unlike legacy on-premise contact center systems, our solution requires minimal up-front investment, can be rapidly deployed and adjusted depending on our client’s requirements.

Since founding our business in 2001, we have focused exclusively on delivering cloud contact center software. We initially targeted smaller contact center opportunities with our telesales team and, over time, invested in expanding the breadth and depth of the functionality of our cloud platform to meet the evolving requirements of our clients. In 2009, we made a strategic decision to expand our market opportunity to include larger contact centers. This decision drove further investments in research and development and the establishment of our field sales team to meet the requirements of these larger contact centers. We believe this shift has helped us diversify our client base, while significantly enhancing our opportunity for future revenue growth. To complement these efforts, we have also focused on building client awareness and driving adoption of our solution through marketing activities, which include internet advertising, digital marketing campaigns, social media, trade shows, industry events, telemarketing and out of home campaigns.

We provide our solution through a SaaS business model with recurring subscriptions. We offer a comprehensive suite of applications delivered on our VCC cloud platform that are designed to enable our clients to manage and optimize interactions across inbound and outbound contact centers. We primarily generate revenue by selling subscriptions and related usage of our VCC cloud platform. We charge our clients monthly subscription fees for access to our solution, primarily based on the number of agent seats, as well as the specific functionalities and applications our clients deploy. We define agent seats as the maximum number of named agents allowed to concurrently access our solution. Our clients typically have more named agents than agent seats, and multiple named agents may use an agent seat, though not simultaneously. Substantially all of our clients purchase both subscriptions and related telephony usage from us. A small percentage of our clients subscribe to our platform but purchase telephony usage directly from wholesale telecommunications service providers. We do not sell telephony usage on a stand-alone basis to any client. The related usage fees are based on the volume of minutes for inbound and outbound interactions. We also offer bundled plans, generally for smaller deployments, where the client is charged a single monthly fixed fee per agent seat that includes both subscription and unlimited usage in the contiguous 48 states and, in some cases, Canada. We offer monthly, annual and multiple-year contracts to our clients, generally with 30 days’ notice required for reductions in the number of agent seats. Increases in the number of agent seats can be provisioned almost immediately. Our clients, therefore, are able to adjust the number of agent seats used to meet their changing contact center volume needs. Our larger clients typically choose annual contracts, which generally include an implementation and ramp period of several months. Fixed subscription fees, including bundled plans, are generally billed monthly in advance, while related usage fees are billed in arrears. For the three months ended March 31, 2022 and 2021, subscription and related usage fees accounted for 91% and 92%, respectively, of our revenue. The remainder was comprised of professional services revenue from the implementation and optimization of our solution.

Russia-Ukraine Conflict

As the Russia-Ukraine conflict continues to evolve, we are closely monitoring the current and potential impact on our business, our people, and our clients. For example, in response to the conflict, the United States and certain

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allies have imposed economic sanctions and export control measures and may impose additional sanctions or export control measures, which have and could in the future result in, among other things, severe or complete restrictions on exports to and other commerce and business dealings involving Russia, Belarus, certain regions of Ukraine, and/or particular entities and individuals. We have taken steps to ensure compliance with applicable regulatory restrictions on international trade and financial transactions. In response to the growing uncertainty arising from the conflict, we made a decision in March 2022 to close our Russia office in June 2022 and to establish a new European development center in Porto, Portugal. During the first quarter of 2022, we incurred approximately $2.7 million in costs related to the closure and relocation of our Russian operations, $0.4 million recorded in cost of revenue, $2.6 million recorded in research and development expense, $0.3 million recorded in general and administrative expense and $(0.6) million recorded in interest income and other in our condensed consolidated statements of operations and comprehensive loss. We currently do not believe that this decision will have a material effect on our business, results of operations or financial condition.

COVID-19

In December 2019, a novel coronavirus disease known as COVID-19 was reported and on March 11, 2020, the World Health Organization, or WHO, characterized COVID-19 as a pandemic. This pandemic has resulted in a widespread health crisis that has significantly harmed the U.S. and global economies and caused significant fluctuation in financial markets, including those on which our common stock and our convertible senior notes trade, and may impact demand for our solution.

In accordance with the various social distancing and other office closure orders and recommendations of applicable government agencies, all of our employees transitioned to work-from-home operations and we canceled all business travel by our employees except where necessary and properly authorized, which changed how we operated our business. Our clients and business partners have been, and continue to be subject to various and changing social distancing and office closure orders and recommendations and travel restrictions and prohibitions, which have changed the way we interact with our clients and business partners. Recently, we have re-opened our U.S. offices for employees to voluntarily return, subject to applicable government regulations. Appropriate measures are being taken to protect the health of employees who return to the office. We have also reinstated business travel on a voluntary basis and subject to prior approval.

COVID-19 had a moderately positive impact on our financial results due to the shift from brick-and-mortar to virtual. The severity and duration of the COVID-19 pandemic, and its impact on the U.S. and global economy remains uncertain, but we believe that there may be a continuing net benefit to us longer term.

Key GAAP Operating Results

Our revenue increased to $182.8 million for the three months ended March 31, 2022 from $137.9 million for the three months ended March 31, 2021. Revenue growth was primarily attributable to our larger clients, driven by an increase in our sales and marketing activities and our improved brand awareness. For each of the three months ended March 31, 2022 and 2021, no single client accounted for more than 10% of our total revenue. As of March 31, 2022, we had over 2,500 clients across multiple industries. Our clients’ subscriptions generally range in size from fewer than 10 agent seats to approximately 7,500 agent seats. We had a net loss of $34.1 million in the three months ended March 31, 2022, compared to a net loss of $12.3 million in the three months ended March 31, 2021.

We have continued to make significant expenditures and investments, including in sales and marketing, research and development and infrastructure. We primarily evaluate the success of our business based on revenue growth and the efficiency and effectiveness of our investments. The growth of our business and our future success depend on many factors, including our ability to continue to expand our base of larger clients, grow revenue from our existing clients, innovate and expand internationally. While these areas represent significant opportunities for us, they also pose risks and challenges, including the impact of the Russia-Ukraine conflict and the COVID-19 pandemic, that we must successfully address in order to sustain the growth of our business and improve our operating results.

Key Operating and Non-GAAP Financial Performance Metrics

In addition to measures of financial performance presented in our condensed consolidated financial statements, we monitor the key metrics set forth below to help us evaluate growth trends, establish budgets, measure the effectiveness of our sales and marketing efforts and assess operational efficiencies.

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Annual Dollar-Based Retention Rate

We believe that our Annual Dollar-Based Retention Rate provides insight into our ability to retain and grow revenue from our clients, and is a measure of the long-term value of our client relationships. Our Annual Dollar-Based Retention Rate is calculated by dividing our Retained Net Revenue by our Retention Base Net Revenue on a monthly basis, which we then average using the rates for the trailing twelve months for the period presented. We define Retention Base Net Revenue as recurring net revenue from all clients in the comparable prior year period, and we define Retained Net Revenue as recurring net revenue from that same group of clients in the current period. We define recurring net revenue as net subscription and related usage revenue.

The following table shows our Annual Dollar-Based Retention Rate based on Net Revenue for the periods presented:

	Twelve Months Ended
	March 31, 2022	March 31, 2021
Annual Dollar-Based Retention Rate	120%	121%

Our Dollar-Based Retention Rate decreased year-over-year primarily due to the initial benefit that we previously experienced in 2021 from the COVID-19 pandemic.

Adjusted EBITDA

We monitor adjusted EBITDA, a non-GAAP financial measure, to analyze our financial results and believe that it is useful to investors, as a supplement to U.S. GAAP measures, in evaluating our ongoing operational performance and enhancing an overall understanding of our past financial performance. We believe that adjusted EBITDA helps illustrate underlying trends in our business that could otherwise be masked by the effect of the income or expenses that we exclude from adjusted EBITDA. Furthermore, we use this measure to establish budgets and operational goals for managing our business and evaluating our performance. We also believe that adjusted EBITDA provides an additional tool for investors to use in comparing our recurring core business operating results over multiple periods with other companies in our industry.

Adjusted EBITDA should not be considered in isolation from, or as a substitute for, financial information prepared in accordance with U.S. GAAP, and our calculation of adjusted EBITDA may differ from that of other companies in our industry. We compensate for the inherent limitations associated with using adjusted EBITDA through disclosure of these limitations, presentation of our financial statements in accordance with U.S. GAAP and reconciliation of adjusted EBITDA to the most directly comparable U.S. GAAP measure, net loss. We calculate adjusted EBITDA as net loss before (1) depreciation and amortization, (2) stock-based compensation, (3) interest expense, (4) interest (income) and other, (5) acquisition-related transaction costs and one-time integration costs, (6) contingent consideration expense, (7) exit costs related to the closure and relocation of our Russian operations, (8) provision for (benefit from) income taxes, and (9) other items that do not directly affect what we consider to be our core operating performance.

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The following table shows a reconciliation of net loss to adjusted EBITDA for the periods presented (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Net loss	$	(34,120)	$	(12,332)
Non-GAAP adjustments:
Depreciation and amortization (1)	10,795		8,763
Stock-based compensation (2)	39,394		20,908
Interest expense	1,870		1,938
Interest (income) and other	(845)		(175)
Acquisition-related transaction costs and one-time integration costs	1,638		1,094
Contingent consideration expense	260		2,500
Exit costs related to closure and relocation of Russian operations (3)	3,227		—
Provision for (benefit from) income taxes	2,256		(517)
Adjusted EBITDA	$	24,475	$	22,179

(1)Depreciation and amortization expenses included in our results of operations are as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cost of revenue	$	8,500	$	7,087
Research and development	825		596
Sales and marketing	1		1
General and administrative	1,469		1,079
Total depreciation and amortization	$	10,795	$	8,763

(2)See Note 7 to the condensed consolidated financial statements for stock-based compensation expense included in our results of operations for the periods presented.

(3)Exit costs related to the closure and relocation of our Russian operations was $2.7 million during the three months ended March 31, 2022. The $3.2 million adjustment presented above is net of $0.1 million included in “Depreciation and amortization” and $(0.6) million included in “Interest (income) and other.”

Key Components of Our Results of Operations

Revenue

Our revenue consists of subscription and related usage as well as professional services. We consider our subscription and related usage to be recurring revenue. This recurring revenue includes fixed subscription fees for the delivery and support of our VCC cloud platform, as well as related usage fees. The related usage fees are generally based on the volume of minutes for inbound and outbound client interactions. We also offer bundled plans, generally for smaller deployments, where the client is charged a single monthly fixed fee per agent seat that includes both subscription and unlimited usage in the contiguous 48 states and, in some cases, Canada. We offer monthly, annual and multiple-year contracts for our clients, generally with 30 days’ notice required for reductions in the number of agent seats. Increases in the number of agent seats can be provisioned almost immediately. Our clients, therefore, are able to adjust the number of agent seats used to meet their changing contact center volume needs. Our larger clients typically choose annual contracts, which generally include an implementation and ramp period of several months.

Fixed subscription fees, including plans with bundled usage, are generally billed monthly in advance, while variable usage fees are billed in arrears. Fixed subscription fees are recognized on a straight-line basis over the applicable term, which is predominantly the monthly contractual billing period. Support activities include technical assistance for our solution and upgrades and enhancements on a when and if available basis, which are not billed separately. Variable subscription related usage fees for non-bundled plans are billed in arrears based on client-specific per minute rate plans and are recognized as actual usage occurs. We generally require advance deposits from clients based on estimated usage. All fees, except usage deposits, are non-refundable.

In addition, we generate professional services revenue from assisting clients in implementing our solution and optimizing use. These services include application configuration, system integration and education and training services. Professional services are primarily billed on a fixed-fee basis and are typically performed by us directly. In

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limited cases, our clients choose to perform these services themselves or engage their own third-party service providers to perform such services. Professional services are recognized as the services are performed using the proportional performance method, with performance measured based on labor hours, provided all other criteria for revenue recognition are met.

Cost of Revenue

Our cost of revenue consists primarily of personnel costs, including stock-based compensation, fees that we pay to telecommunications providers for usage, Universal Service Fund, or USF, contributions and other regulatory costs, depreciation and related expenses of the servers and equipment, costs to build out and maintain co-location data centers, costs of public cloud-based data centers, allocated office and facility costs, amortization of acquired technology and amortization of internal-use software costs. Cost of revenue can fluctuate based on a number of factors, including the fees we pay to telecommunications providers, which vary depending on our clients’ usage of our VCC cloud platform, the timing of capital expenditures and related depreciation charges and changes in headcount. We expect to continue investing in our network infrastructure and operations and client support function to maintain high quality and availability of services, which investments we believe will result in absolute dollar increases in cost of revenue but percentage of revenue declines in the long-term through economies of scale. In the near-term, however, we expect cost of revenue to increase both in absolute dollars and as a percentage of revenue, primarily due to increased investments in professional services, public cloud and cloud operations to support our growth initiatives.

Operating Expenses

We classify our operating expenses as research and development, sales and marketing, and general and administrative expenses.

Research and Development.    Our research and development expenses consist primarily of salary and related expenses, including stock-based compensation, for personnel related to the development of improvements and expanded features for our services, as well as quality assurance, testing, product management and allocated overhead. We expense research and development expenses as they are incurred except for internal use software development costs that qualify for capitalization. We capitalize a portion of our software development costs that meet the criteria for capitalization. We believe that continued investment in our solution is important for our future growth, and we expect our research and development expenses to increase in absolute dollars and as a percentage of revenue in the near term and to fluctuate in the longer term.

Sales and Marketing.    Sales and marketing expenses consist primarily of salaries and related expenses, including stock-based compensation, for personnel in sales and marketing, sales commissions, as well as advertising, marketing, corporate communications, travel costs and allocated overhead. We believe it is important to continue investing in sales and marketing to continue to generate revenue growth, and we expect sales and marketing expenses to increase in absolute dollars and fluctuate as a percentage of revenue in the near and longer term as we continue to support our growth initiatives.

General and Administrative.    General and administrative expenses consist primarily of salary and related expenses, including stock-based compensation, for management, finance and accounting, legal, information systems and human resources personnel, professional fees, compliance costs, other corporate expenses and allocated overhead. We expect that general and administrative expenses will fluctuate in absolute dollars and as a percentage of revenue in the near term, but to increase in absolute dollars and decline as a percentage of revenue in the longer term.

Results of Operations for the Three Months Ended March 31, 2022 and 2021

Based on the condensed consolidated statements of operations and comprehensive loss set forth in this Quarterly Report on Form 10-Q, the following table sets forth our operating results as a percentage of revenue for

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the periods indicated:

	Three Months Ended
	March 31, 2022		March 31, 2021
Revenue	100	%	100	%
Cost of revenue	49	%	43	%
Gross profit	51	%	57	%
Operating expenses:
Research and development	20	%	16	%
Sales and marketing	35	%	32	%
General and administrative	13	%	17	%
Total operating expenses	68	%	65	%
Loss from operations	(17)	%	(8)	%
Other (expense) income, net:
Interest expense	(1)	%	(1)	%
Interest income and other	—	%	—	%
Total other (expense) income, net	(1)	%	(1)	%
Loss before income taxes	(18)	%	(9)	%
Provision for (benefit from) income taxes	1	%	—	%
Net loss	(19)	%	(9)	%

Revenue

	Three Months Ended
	March 31, 2022		March 31, 2021		$ Change		% Change
	(in thousands, except percentages)
Revenue	$	182,777	$	137,882	$	44,895	33	%

The increase in revenue for the three months ended March 31, 2022 compared to the same period of 2021 was primarily attributable to our larger clients, driven by an increase in our sales and marketing activities and our improved brand awareness.

Cost of Revenue

	Three Months Ended
	March 31, 2022			March 31, 2021			$ Change		% Change
	(in thousands, except percentages)
Cost of revenue	$	88,867		$	59,803		$	29,064	49	%
% of Revenue	49		%	43		%

The increase in cost of revenue for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to a $12.9 million increase in personnel costs, including stock-based compensation costs, driven mainly by increased headcount and higher salaries, a $6.7 million increase in depreciation, data center and public cloud costs to support our growing capacity needs, a $5.4 million increase in third-party hosted software costs driven by increased client activities, a $2.5 million increase in usage and carrier costs due to increased volume and higher costs, a $1.3 million increase in consulting costs for global expansion and a $1.1 million increase in staff augmentation costs related to implementation of our solutions, partially offset by a $1.3 million decrease in USF contributions and other federal telecommunication service fees due primarily to a decrease in the USF contribution rate offset in part by increased client usage.

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Gross Profit

	Three Months Ended
	March 31, 2022			March 31, 2021			$ Change		% Change
	(in thousands, except percentages)
Gross profit	$	93,910		$	78,079		$	15,831	20	%
% of Revenue	51		%	57		%

The increase in gross profit for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to increases in subscription and related revenues. The decrease in gross margin for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to the increase in personnel costs, driven by increased headcount and higher salaries, the increase in depreciation, data center and public cloud costs to support our growing capacity needs, the increase in third-party hosted software costs driven by increased client activities, the increase in usage and carrier costs, the increase in consulting costs due for global expansion and the increase in staff augmentation costs related to implementation of our solutions, offset in part a decrease in USF contributions and other federal telecommunication service fees due primarily to a decrease in the USF contribution rate. Due to increased investments in professional services, public cloud and cloud operations, we expect gross margin to decline slightly in the near term and increase in the long term.

Operating Expenses

Research and Development

	Three Months Ended
	March 31, 2022			March 31, 2021			$ Change		% Change
	(in thousands, except percentages)
Research and development	$	35,824		$	22,121		$	13,703	62	%
% of Revenue	20		%	16		%

The increase in research and development expenses for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to a $12.2 million increase in personnel-related costs including stock-based compensation costs, driven mainly by increased headcount and higher salaries, and a $0.6 million increase in office, facilities and related costs.

Sales and Marketing

	Three Months Ended
	March 31, 2022			March 31, 2021			$ Change		% Change
	(in thousands, except percentages)
Sales and marketing	$	64,611		$	44,799		$	19,812	44	%
% of Revenue	35		%	32		%

The increase in sales and marketing expenses for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to a $13.9 million increase in personnel-related costs, including stock-based compensation costs driven mainly by increased headcount and higher salaries, a $3.4 million increase in sales commission expenses driven by the growth in sales and bookings of our solution, a $1.1 million increase in travel costs and a $0.6 million increase in office, facilities and related costs. The remaining net increase in sales and marketing expenses was primarily due to the execution of our growth strategy to acquire new clients, increase the number of agent seats within our existing client base, and increased advertising and other marketing expenses to increase our brand awareness.

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General and Administrative

	Three Months Ended
	March 31, 2022			March 31, 2021			$ Change		% Change
	(in thousands, except percentages)
General and administrative	$	24,314		$	22,245		$	2,069	9	%
% of Revenue	13		%	17		%

The increase in general and administrative expenses for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to a $3.0 million increase in personnel costs including stock-based compensation costs, driven mainly by increased headcount and higher salaries, a $1.7 million increase in legal and other professional service costs, partially offset by a $2.2 million decrease in contingent consideration expense for the Inference acquisition.

Other (Expense) Income, Net

	Three Months Ended
	March 31, 2022			March 31, 2021			$ Change		% Change
	(in thousands, except percentages)
Interest expense	$	(1,870)		$	(1,938)		$	68	(4)	%
Interest income and other	845			175			670		383	%
Total other (expense) income, net	$	(1,025)		$	(1,763)		$	738	(42)	%
% of Revenue	(1)		%	(1)		%

The decrease in interest expense for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to the reduction in the aggregate outstanding principal amount of our 2023 convertible senior notes. See Note 6 to the consolidated financial statements for further details.

The increase in interest income and other for the three months ended March 31, 2022 compared to the same period of 2021 was primarily due to an increase in foreign currency remeasurement gains.

Liquidity and Capital Resources

To date, we have financed our operations primarily through sales of our solution, net proceeds from our equity and debt financings, including the issuance of our 2025 convertible senior notes in May and June 2020 and of our 2023 convertible senior notes in May 2018, and lease facilities. As of March 31, 2022, we had $440.8 million in working capital, which included $100.2 million in cash and cash equivalents and $496.2 million in short-term and long-term marketable investments. We believe our existing cash and cash equivalents will be sufficient to meet our working capital and capital expenditure needs for at least the next 12 months. 

We plan to continue to finance our operations in the future primarily through sales of our solution, net proceeds from equity and debt financings, and lease facilities. Our future capital requirements will depend on many factors including our growth rate, continuing market acceptance of our solution, client retention, our ability to gain new clients, the timing and extent of spending to support research and development efforts, the outcome of any pending or future litigation or other claims by third parties or governmental entities, the expansion of sales and marketing activities and personnel, the introduction of new and enhanced offerings, expenses incurred in closing our Russia operations and opening a new office in Europe and any operational disruptions due to this transition, and the impact of the Russia-Ukraine conflict and the COVID-19 pandemic on these or other factors, the global economy, or our business. We may also acquire or invest in complementary businesses, technologies and intellectual property rights, which may increase our use of cash and future capital requirements, both to pay acquisition costs and to support our combined operations. We may raise additional capital through equity or engage in debt financings at any time to fund these or other requirements. However, we may not be able to raise additional capital through equity or debt financings when needed on terms acceptable to us or at all, depending on our financial performance, market conditions, the trading price of our common stock, and other factors, including the length and severity of the impact of the Russia-Ukraine conflict and the COVID-19 pandemic on general economic conditions and the financial markets. If we are unable to raise additional capital as needed, our business, operating results and financial condition

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could be harmed. In addition, if our operating performance during the next twelve months is below our expectations, our liquidity and ability to operate our business also could be harmed.

If we raise additional funds by issuing equity or equity-linked securities, the ownership of our existing stockholders would be diluted. If we raise additional funds through the incurrence of additional indebtedness, we will be subject to increased debt service obligations and could also be subject to restrictive covenants and other operating restrictions that could negatively impact our ability to operate our business.

Cash Flows

The following table summarizes our cash flows for the periods presented (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Net cash provided by operating activities	$	28,724	$	13,765
Net cash provided by (used in) investing activities	11,177		(51,730)
Net cash used in financing activities	(30,628)		(6,081)
Net increase (decrease) in cash and cash equivalents	$	9,273	$	(44,046)

Cash Flows from Operating Activities

Cash provided by operating activities is primarily influenced by our personnel-related expenditures, data center and telecommunications carrier costs, office and facility related costs, USF contributions and other regulatory costs and the amount and timing of client payments. If we continue to improve our financial results, we expect net cash provided by operating activities to increase. Our largest source of operating cash inflows is cash collections from our clients for subscription and related usage services. Payments from clients for these services are typically received monthly.

Net cash provided by operating activities was $28.7 million during the three months ended March 31, 2022. Net cash provided by operating activities resulted from our net loss of $34.1 million adjusted for non-cash items of $65.5 million, primarily consisting of $39.4 million of stock-based compensation, $10.8 million of depreciation and amortization, $8.7 million of amortization of commission costs, $0.9 million of amortization of issuance costs on our convertible senior notes and $0.3 million of contingent consideration expense, offset by use of cash for operating assets and liabilities of $(2.6) million primarily due to the timing of cash payments to vendors and cash receipts from customers.

Net cash provided by operating activities was $13.8 million during the three months ended March 31, 2021. Net cash provided by operating activities resulted from our net loss of $12.3 million adjusted for non-cash items of $43.1 million, primarily consisting of $20.9 million of stock-based compensation, $8.8 million of depreciation and amortization, $5.5 million of amortization of commission costs, $2.5 million of contingent consideration expense and $1.0 million of amortization of issuance costs on our convertible senior notes, offset by use of cash for operating assets and liabilities of $(17.0) million primarily due to the timing of cash payments to vendors and cash receipts from customers.

Cash Flows from Investing Activities

Net cash provided by investing activities of $11.2 million in the three months ended March 31, 2022 was comprised of $131.4 million related to cash proceeds from sales and maturities of marketable investments, offset in part by $105.3 million related to purchases of marketable investments, $12.4 million in capital expenditures, $2.0 million in connection with an equity investment in a privately-held company and $0.6 million in capitalized software development costs.

Net cash used in investing activities of $(51.7) million in the three months ended March 31, 2021 was comprised of $163.7 million related to purchases of marketable investments and $8.2 million in capital expenditures, offset in part by $120.2 million related to cash proceeds from maturities of marketable investments.

Cash Flows from Financing Activities

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Net cash used in financing activities of $(30.6) million in the three months ended March 31, 2022 related to $31.9 million of cash paid in connection with other 2023 convertible senior note settlements, partially offset by cash proceeds of $1.3 million from exercise of stock options.

Net cash used in financing activities of $(6.1) million in the three months ended March 31, 2021 related to $7.8 million of cash paid in connection with other 2023 convertible senior note settlements and $0.5 million of payments related to finance leases, partially offset by cash proceeds of $2.2 million from exercise of stock options.

Critical Accounting Policies and Estimates

Our condensed consolidated financial statements are prepared in accordance with U.S. GAAP. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, expenses and related disclosures. On an ongoing basis, we evaluate our estimates and assumptions. Our actual results may differ from these estimates under different assumptions or conditions.

There have been no material changes to our critical accounting policies and estimates from those disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 filed with the SEC on February 28, 2022.

Recent Accounting Pronouncements

Refer to Note 1 of the notes to condensed consolidated financial statements included in this report.

Contractual and Other Obligations

Our material cash requirements include the following contractual and other obligations.

Convertible Senior Notes

In May and June 2020, we issued $747.5 million aggregate principal amount of our 2025 convertible senior notes in a private offering. The 2025 convertible senior notes mature on June 1, 2025 and are our senior unsecured obligations. The 2025 convertible senior notes bear interest at a fixed rate of 0.50% per annum, payable semiannually in arrears on June 1 and December 1 of each year, beginning December 1, 2020. The total net proceeds from the offering, after deducting initial purchasers’ discounts and commissions and estimated debt issuance costs, were approximately $728.8 million. As of March 31, 2022, the aggregate principal amount outstanding of our 2025 convertible senior notes was $747.5 million.

In May 2018, we issued $258.8 million aggregate principal amount of our 2023 convertible senior notes in a private offering. The 2023 convertible senior notes mature on May 1, 2023 and are our senior unsecured obligations. The 2023 convertible senior notes bear interest at a fixed rate of 0.125% per annum, payable semiannually in arrears on May 1 and November 1 of each year. The total net proceeds from the offering, after deducting the initial purchasers’ discounts and estimated debt issuance costs, were approximately $250.8 million. As of March 31, 2022, after giving effect to the 2023 Note Repurchase Transactions and other settlements upon conversion requests, approximately $2.3 million aggregate principal amount of 2023 convertible senior notes remained outstanding.

For additional information regarding the convertible senior notes, see Note 6 to the consolidated financial statements included in this report.

Leases

We have leases for offices, data centers and computer and networking equipment that expire at various dates through 2031. Our leases have remaining terms of one to ten years. Some of the leases include an option to extend the leases for up to three to five years, and some of the leases include the option to terminate the leases upon 30-days notice. We had outstanding operating lease obligations of $61.6 million as of March 31, 2022, with $8.7 million payable in the remainder of 2022, $18.6 million payable in 2023 and 2024, $11.4 million payable in 2025 and 2026, and $22.9 million after 2026. See Note 12 to the consolidated financial statements included in this report for further details.

Cloud Services

As of March 31, 2022, we had outstanding cloud service agreement commitments totaling $55.4 million, of which $12.6 million is expected to be paid in the remainder of 2022 and the remaining $42.8 million in 2023.

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Hosting and Telecommunication Usage Services

We have agreements with third parties to provide co-location hosting and telecommunication usage services. The agreements require payments per month for a fixed period of time in exchange for certain guarantees of network and telecommunication availability. As of March 31, 2022, we had outstanding hosting and telecommunication usage services obligations of $19.5 million, with $7.1 million payable in the remainder of 2022, $12.1 million payable in 2023 and 2024, and $0.3 million payable in 2025 and 2026.

Indemnification Agreements

In the ordinary course of business, we enter into agreements of varying scope and terms pursuant to which we agree to indemnify clients, vendors, lessors, business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, services to be provided by us or from intellectual property infringement claims made by third parties. In addition, we have entered into indemnification agreements with our directors, officers and certain employees that will require us, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees. There are no claims that we are aware of that could have a material effect on our consolidated balance sheet, consolidated statements of operations and comprehensive loss, or consolidated statements of cash flows.

 Contingencies — Legal and Regulatory

We are subject to certain legal and regulatory proceedings, and from time to time may be involved in a variety of claims, lawsuits, investigations, and proceedings relating to contractual disputes, intellectual property rights, employment matters, regulatory compliance matters, and other litigation matters relating to various claims that arise in the normal course of business. We determine whether an estimated loss from a contingency should be accrued by assessing whether a loss is deemed probable and can be reasonably estimated. We assess our potential liability by analyzing specific litigation and regulatory matters using reasonably available information. We develop our views on estimated losses in consultation with inside and outside counsel, which involves a subjective analysis of potential results and outcomes, assuming various combinations of appropriate litigation and settlement strategies. Legal fees are expensed in the period in which they are incurred. See Note 10 to the consolidated financial statements for more details.

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ITEM 3. Quantitative and Qualitative Disclosure about Market Risk

We are exposed to market risk in the ordinary course of our business. Market risk represents the risk of loss that may impact our financial position due to adverse changes in financial market prices and rates. Our market risk exposure is primarily a result of fluctuations in interest rates and foreign currency exchange rates. We do not hold or issue financial instruments for trading purposes. For a discussion of market risk, see “Quantitative and Qualitative Disclosure about Market Risk” in Item 7A of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021. Our exposure to market risk has not changed materially since December 31, 2021.

We had cash and cash equivalents, and marketable securities totaling $596.4 million as of March 31, 2022. Cash equivalents and marketable securities were invested primarily in U.S. agency securities, U.S. treasury, municipal bonds, commercial paper, corporate bonds, certificates of deposit and money market funds. Our investment policy is focused on the preservation of capital and supporting our liquidity needs. Under the policy, we invest in highly rated securities, while limiting the amount of credit exposure to any one issuer other than the U.S. government. We do not invest in financial instruments for trading or speculative purposes, nor do we use leveraged financial instruments. We utilize external investment managers who adhere to the guidelines of our investment policy. A hypothetical 100 basis point change in interest rates would not have a material impact on the value of our cash and cash equivalents or marketable investments.

As of March 31, 2022, aggregate principal amount outstanding of our 2025 convertible senior notes and 2023 convertible senior notes was $747.5 million and $2.3 million, respectively. The fair value of the convertible senior notes are subject to interest rate risk, market risk and other factors due to their conversion features. The fair value of the convertible senior notes will generally increase as our common stock price increases and will generally decrease as our common stock price declines. The interest and market value changes affect the fair value of the convertible senior notes but do not impact our financial position, cash flows or results of operations due to the fixed nature of the debt obligations. Additionally, we carry the convertible senior notes at face value less unamortized discount on our condensed consolidated balance sheets, and we present the fair value for required disclosure purposes only.

Our convertible senior notes bear fixed interest rates, and therefore, are not subject to interest rate risk. We have not utilized derivative financial instruments, derivative commodity instruments or other market risk sensitive instruments, positions or transactions in any material fashion, except for the privately negotiated capped call transactions entered into in May and June 2020 and May 2018 related to the issuance of our 2025 convertible senior notes and our 2023 convertible senior notes, respectively.

The functional currency of our foreign subsidiaries is the U.S. dollar. Our sales are primarily denominated in U.S. dollars and, therefore, our revenue is not directly subject to foreign currency risk. However, we are indirectly exposed to foreign currency risk. A stronger U.S. dollar could make our solution more expensive outside the United States and therefore reduce demand. A weaker U.S. dollar could have the opposite effect. Such economic exposure to currency fluctuations is difficult to measure or predict because our sales are influenced by many factors in addition to the impact of currency fluctuations. Our operating expenses are generally denominated in the currencies of the countries in which our operations are located, except for Russia where compensation of our employees is primarily denominated in the U.S. dollar. In March 2022, we made a decision to close our Russia office in June 2022 and to establish a new European development center in Porto, Portugal.

Our consolidated results of operations and cash flows are, therefore, subject to fluctuations due to changes in foreign currency exchange rates and may be adversely affected in the future due to changes in foreign exchange rates. To date, we have not entered into any hedging arrangements with respect to foreign currency risk or other derivative financial instruments. During the three months ended March 31, 2022, the effect of a hypothetical 10% change in foreign currency exchange rates applicable to our business would have a maximum impact of $1.4 million on our operating expenses.

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ITEM 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of March 31, 2022.

Based on management’s evaluation, our Chief Executive Officer and Chief Financial Officer concluded that, as of March 31, 2022, our disclosure controls and procedures were designed, and were effective, to provide assurance at a reasonable level that the information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms, and that such information is accumulated and communicated to our management as appropriate to allow timely decisions regarding required disclosures.

In designing and evaluating our disclosure controls and procedures, management recognizes that any disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs.

Changes in Internal Control over Financial Reporting

During the three months ended March 31, 2022, there was no change in our internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. Legal Proceedings

Information with respect to this Item may be found under the heading “Legal Matters” in Note 10 to the condensed consolidated financial statements in this Quarterly Report on Form 10-Q, which information is incorporated herein by reference.

ITEM 1A. Risk Factors

Except for the below risk factors, which updates that previously disclosed in our Annual Report on Form 10-K as filed with the SEC on February 28, 2022, there have been no material changes from the Risk Factors previously disclosed in Part 1, Item 1A, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021. In addition to the other information set forth in this report, including the below update to Risk Factors, you should carefully consider the Risk Factors discussed in our Annual Report on Form 10-K as they could materially affect our business, financial condition and future results of operation.

Risks Related to Our International Operations

We continue to expand our international operations, which exposes us to significant risks.

To date, we have not generated significant revenues outside of the U.S., Canada, the U.K., Latin America and Australia. However, we already have significant operations outside these countries and regions, and we expect to grow our international presence in the future. Our international employees are primarily located in the Philippines, where technical support, training and other professional services are performed, Russia, where portions of engineering and operations have been performed, and Australia, after our acquisition of Inference, where additional portions of engineering and operations are now performed. In March 2022, we made a decision to close our Russia office in June 2022 and to establish a new European development center in Porto, Portugal. While some of our Russian-citizen employees may be eligible to travel to and work in Portugal, it may not be feasible to retain all of them and we may have to expand recruiting and employment-related efforts in Portugal. We have and will continue to incur costs in connection with this transition, and during the transition we may experience operational disruptions, and there can be no assurance that our new European operations will be as effective or as efficient as our prior Russian operations, which could harm our business and results of operations. The future success of our business will depend, in part, on our ability to expand our operations and customer base to other countries, including our new location in Porto, Portugal.

Operating in international markets requires significant resources and management attention and will subject us to regulatory, economic, and political risks that are different from those in the U.S. In addition, in order to effectively market and sell our solution in international markets, we will be required to localize our solution, including the language in which our solution is offered, which will increase our costs, could result in delays in offering our solution in these markets and may decrease the effectiveness of our sales efforts. Due to our limited experience with international operations and developing and managing sales and distribution channels in international markets, our international expansion efforts may not be successful.

We also will incur additional compliance costs associated with our international operations, including costs associated with expanding and rapidly changing sanctions and other trade controls. In addition, we may be unaware or unable to keep current with changes in foreign government requirements and laws as they change from time to time, which often occurs with minimal or no advance notice. Failure to comply with these regulations could harm our business. In many countries outside the United States, it is common for others to engage in business practices that are prohibited by our internal policies and procedures or United States or international laws and regulations applicable to us. Although we have implemented policies and procedures designed to ensure compliance with these laws and policies, there can be no assurance that all of our employees, contractors, strategic partners and agents will comply with these laws and policies. Violations of laws or key control policies by our employees, contractors, strategic partners or agents could result in delays in revenue recognition, financial reporting misstatements, fines, delays in filing financial reports required as a public company, penalties, harm to our reputation or prohibitions on selling our solution, any of which could harm our business.

While we have worked to avoid and mitigate any effects of the Russia-Ukraine conflict on our business, employees and clients, the conflict is ongoing, and its ultimate scope and broader impacts cannot be predicted with certainty. For example, while the conflict has not yet had a negative impact on our employees, business, or operations outside these regions, it could, and if the conflict or related geopolitical tensions extend to other countries, such negative impacts could expand. Our business and operations could be harmed and our costs could

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increase if our or our clients’ or other partners’ manufacturing, logistics or other operations, costs or financial performance are disrupted or adversely affected. The Russia-Ukraine conflict has also had an adverse impact on the global economy, including on the inflation rate, and has caused significant fluctuation in global stock markets, including The NASDAQ Stock Market. All of these risks and conditions could harm our future sales, business and operating results.

ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds

Not applicable.

ITEM 3. Defaults Upon Senior Securities

None.

ITEM 4. Mine Safety Disclosures

Not applicable.

ITEM 5. Other Information

None.

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ITEM 6. Exhibits

Exhibit Number	Description
10.1+Ø	Five9 Inc. Performance-Based Restricted Stock Unit Grant Notice and Award Agreement - 2014 Equity Incentive Plan (filed as Exhibit 10.19 to the Company's Annual Report on Form 10-K filed with the SEC on February 28, 2022 (File No. 001-36383) and incorporated by reference herein).
31.1*	Certification of Chief Executive Officer of Five9, Inc. Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Chief Financial Officer of Five9, Inc. Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certification of Chief Executive Officer and Chief Financial Officer of Five9, Inc. Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS*	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH*	XBRL Taxonomy Schema Linkbase Document
101.CAL*	XBRL Taxonomy Calculation Linkbase Document
101.DEF*	XBRL Taxonomy Definition Linkbase Document
101.LAB*	XBRL Taxonomy Labels Linkbase Document
101.PRE*	XBRL Taxonomy Presentation Linkbase Document
104	Cover Page Interactive Data File. Formatted as inline XBRL and contained in Exhibit 101.

Ø Previously filed.

+ Indicates management contract or compensatory plan.

* Filed herewith.

** Furnished herewith.

44

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

			Five9, Inc.
Date:	April 28, 2022	By:	/s/ Rowan Trollope
			Rowan Trollope
			Chief Executive Officer
			(Principal Executive Officer)
			/s/ Barry Zwarenstein
			Barry Zwarenstein
			Chief Financial Officer
			(Principal Financial Officer)
			/s/ Leena Mansharamani
			Leena Mansharamani
			Chief Accounting Officer
			(Principal Accounting Officer)

45

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Rowan Trollope, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Five9, Inc. for the quarter ended March 31, 2022;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	April 28, 2022	By:	/s/ Rowan Trollope
			Rowan Trollope
			Chief Executive Officer
			(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Barry Zwarenstein, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Five9, Inc. for the quarter ended March 31, 2022;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	April 28, 2022	By:	/s/ Barry Zwarenstein
			Barry Zwarenstein
			Chief Financial Officer
			(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Rowan Trollope, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Five9, Inc. (the “Company”) on Form 10-Q for the fiscal quarter ended March 31, 2022 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of the Company.

Date:	April 28, 2022	By:	/s/ Rowan Trollope
			Rowan Trollope
			Chief Executive Officer

I, Barry Zwarenstein, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Five9, Inc. (the “Company”) on Form 10-Q for the fiscal quarter ended March 31, 2022 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of the Company.

Date:	April 28, 2022	By:	/s/ Barry Zwarenstein
			Barry Zwarenstein
			Chief Financial Officer

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Five9, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2022	Apr. 22, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-36383
Entity Registrant Name	Five9, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3394123
Entity Address, Address Line One	3001 Bishop Drive
Entity Address, Address Line Two	Suite 350
Entity Address, City or Town	San Ramon
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94583
City Area Code	925
Local Phone Number	201-2000
Title of 12(b) Security	Common stock, par value $0.001 per share
Trading Symbol	FIVN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		69,557,425
Entity Central Index Key	0001288847
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 100,151	$ 90,878
Marketable investments	377,519	378,980
Accounts receivable, net	77,912	83,731
Prepaid expenses and other current assets	32,534	30,342
Deferred contract acquisition costs, net	36,478	33,295
Total current assets	624,594	617,226
Property and equipment, net	91,476	77,785
Operating lease right-of-use assets	46,536	48,703
Intangible assets, net	36,950	39,897
Goodwill	165,420	165,420
Marketable investments	118,707	147,377
Other assets	11,748	11,871
Deferred contract acquisition costs, net — less current portion	92,964	84,663
Total assets	1,188,395	1,192,942
Current liabilities:
Accounts payable	31,981	20,510
Accrued and other current liabilities	91,411	78,577
Operating lease liabilities	10,135	9,826
Accrued federal fees	1,650	2,282
Sales tax liabilities	2,047	2,660
Deferred revenue	46,564	43,720
Total current liabilities	183,788	157,575
Convertible senior notes	737,865	768,599
Sales tax liabilities — less current portion	883	877
Operating lease liabilities — less current portion	44,818	47,088
Other long-term liabilities	6,682	7,671
Total liabilities	974,036	981,810
Commitments and contingencies (Note 10)
Stockholders’ equity:
Common stock	70	68
Additional paid-in capital	480,215	439,787
Accumulated other comprehensive loss	(3,370)	(287)
Accumulated deficit	(262,556)	(228,436)
Total stockholders’ equity	214,359	211,132
Total liabilities and stockholders’ equity	$ 1,188,395	$ 1,192,942

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 182,777	$ 137,882
Cost of revenue	88,867	59,803
Gross profit	93,910	78,079
Operating expenses:
Research and development	35,824	22,121
Sales and marketing	64,611	44,799
General and administrative	24,314	22,245
Total operating expenses	124,749	89,165
Loss from operations	(30,839)	(11,086)
Other (expense) income, net:
Interest expense	(1,870)	(1,938)
Interest income and other	845	175
Total other (expense) income, net	(1,025)	(1,763)
Loss before income taxes	(31,864)	(12,849)
Provision for (benefit from) income taxes	2,256	(517)
Net loss	$ (34,120)	$ (12,332)
Net loss per share:
Basic (in USD per share)	$ (0.49)	$ (0.18)
Diluted (in USD per share)	$ (0.49)	$ (0.18)
Shares used in computing net loss per share:
Basic (in shares)	68,974	66,721
Diluted (in shares)	68,974	66,721
Comprehensive Loss:
Net loss	$ (34,120)	$ (12,332)
Other comprehensive (loss) income	(3,083)	44
Comprehensive loss	$ (37,203)	$ (12,288)

XML

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	[1]	Common Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjustment	[1]	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	[1]
Beginning balance (in shares) at Dec. 31, 2020				66,496
Beginning balance at Dec. 31, 2020	$ 279,164	$ (145,669)		$ 67	$ 476,941	$ (168,412)		$ 335	$ (198,179)	$ 22,743
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon partial conversion of the 2023 convertible senior notes (in shares)				143
Issuance of common stock upon partial conversion of the 2023 convertible senior notes	(143)				(143)
Partial unwind of capped calls and retirement of common stock related to the 2023 convertible senior notes (in shares)				(19)
Partial unwind of capped calls and retirement of common stock related to the 2023 convertible senior notes	19				19
Issuance of common stock upon exercise of stock options (in shares)				123
Issuance of common stock upon exercise of stock options	2,215				2,215
Issuance of common stock upon vesting of restricted stock units (in shares)				286
Stock-based compensation	20,908				20,908
Other comprehensive (loss) income	44							44
Net loss	(12,332)								(12,332)
Ending balance (in shares) at Mar. 31, 2021				67,029
Ending balance at Mar. 31, 2021	144,206			$ 67	331,528			379	(187,768)
Beginning balance (in shares) at Dec. 31, 2021				68,488
Beginning balance at Dec. 31, 2021	211,132			$ 68	439,787			(287)	(228,436)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon partial conversion of the 2023 convertible senior notes (in shares)				540
Issuance of common stock upon partial conversion of the 2023 convertible senior notes	(244)				(244)
Partial unwind of capped calls and retirement of common stock related to the 2023 convertible senior notes (in shares)				(111)
Partial unwind of capped calls and retirement of common stock related to the 2023 convertible senior notes	2				2
Issuance of common stock upon exercise of stock options (in shares)				281
Issuance of common stock upon exercise of stock options	1,277			$ 1	1,276
Issuance of common stock upon vesting of restricted stock units (in shares)				323
Issuance of common stock upon vesting of restricted stock units	1			$ 1
Stock-based compensation	39,394				39,394
Other comprehensive (loss) income	(3,083)							(3,083)
Net loss	(34,120)								(34,120)
Ending balance (in shares) at Mar. 31, 2022				69,521
Ending balance at Mar. 31, 2022	$ 214,359			$ 70	$ 480,215			$ (3,370)	$ (262,556)

[1] Effective January 1, 2021, the Company adopted ASU 2020-06, Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. Accordingly, the Company recorded a net reduction to opening accumulated deficit of $22.7 million and a net reduction to opening additional paid-in capital of $168.4 million as of January 1, 2021 due to the cumulative impact of adopting this new standard.

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (34,120)	$ (12,332)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	10,795	8,763
Amortization of operating lease right-of-use assets	2,403	2,389
Amortization of deferred contract acquisition costs	8,678	5,540
Amortization of premium on marketable investments	700	1,682
Provision for doubtful accounts	222	160
Stock-based compensation	39,394	20,908
Amortization of discount and issuance costs on convertible senior notes	930	974
Deferred Income Tax Expense (Benefit)	1,889	0
Change in fair of value of contingent consideration	260	2,500
Other	210	186
Changes in operating assets and liabilities:
Accounts receivable	5,566	(3,543)
Prepaid expenses and other current assets	(2,162)	(3,524)
Deferred contract acquisition costs	(20,160)	(15,983)
Other assets	234	101
Accounts payable	11,133	351
Accrued and other current liabilities	2,096	5,299
Accrued federal fees and sales tax liabilities	(1,239)	738
Deferred revenue	2,659	322
Other liabilities	(764)	(766)
Net cash provided by operating activities	28,724	13,765
Cash flows from investing activities:
Purchases of marketable investments	(105,277)	(163,683)
Proceeds from sales of marketable investments	600	0
Proceeds from maturities of marketable investments	130,821	120,182
Purchases of property and equipment	(12,398)	(8,229)
Capitalization of software development costs	(569)	0
Cash paid for an equity investment in a privately-held company	(2,000)	0
Net cash provided by (used in) investing activities	11,177	(51,730)
Cash flows from financing activities:
Repurchase of a portion of 2023 convertible senior notes, net of costs	(31,905)	(7,840)
Proceeds from exercise of common stock options	1,277	2,215
Payments of finance leases	0	(456)
Net cash used in financing activities	(30,628)	(6,081)
Net increase (decrease) in cash and cash equivalents	9,273	(44,046)
Cash and cash equivalents:
Beginning of period	90,878	220,372
End of period	100,151	176,326
Supplemental disclosures of cash flow data:
Cash paid for interest	0	13
Cash paid for income taxes	337	73
Non-cash investing and financing activities:
Equipment purchased and unpaid at period-end	22,365	7,515
Capitalization of leasehold improvements and furniture and fixtures through non-cash lease incentive	$ 0	$ 4,815

XML

Description of Business and Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Description of Business and Summary of Significant Accounting Policies

Description of Business and Summary of Significant Accounting Policies

Five9, Inc. and its wholly-owned subsidiaries (the “Company”) is a provider of cloud software for contact centers. The Company was incorporated in Delaware in 2001 and is headquartered in San Ramon, California. The Company has offices in Europe, Asia and Australia, which primarily provide research, development, sales, marketing, and client support services.

Basis of Presentation

The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. All intercompany transactions and balances have been eliminated in consolidation.

Use of Estimates

The preparation of condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The significant estimates made by management affect revenue and related reserves, as well as the fair value of liabilities assumed through business combinations. Management periodically evaluates such estimates and they are adjusted prospectively based upon such periodic evaluation. Actual results could differ from those estimates.

Significant Accounting Policies

Except for the below significant accounting policy, which updates the significant accounting policies previously disclosed in our Annual Report on Form 10-K as filed with the SEC on February 28, 2022, there have been no material changes from the significant accounting policies previously disclosed in Part II, Item 8, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021.

Internal-use software development costs

The Company capitalizes certain qualifying costs incurred during the development stage of internal-use software. Costs related to preliminary project activities and post-implementation activities are expensed in research and development as incurred. Preliminary project activities include conceptual formulation, evaluation and final selection of alternatives, planning, proof of concept and requirement analysis of the selected alternative. Post-implementation stage begins when the inter-use software is ready for its intended use, and includes all internal and external training and application maintenance activities. Capitalized internal-use software costs are included within property and equipment, net on the condensed consolidated balance sheets, and are amortized over the estimated useful life of the software, which is typically three years. The related amortization expense is recognized in cost of revenue.

Recent Accounting Pronouncements Not Yet Effective

The Company has reviewed or is in the process of evaluating all issued, but not yet effective, accounting pronouncements and does not believe the future adoption of any such accounting pronouncements will cause a material impact on its condensed consolidated financial position, operating results or cash flows.

XML

Revenue

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Contract Balances

The following table provides information about accounts receivable, net, deferred contract acquisition costs, net, contract assets and contract liabilities from contracts with customers (in thousands):

	March 31, 2022		December 31, 2021
Accounts receivable, net	$	77,912	$	83,731
Deferred contract acquisition costs, net:
Current	$	36,478	$	33,295
Non-current	92,964		84,663
Total deferred contract acquisition costs, net	$	129,442	$	117,958
Contract assets and contract liabilities:
Contract assets (included in prepaid expenses and other current assets)	$	2,731	$	2,593
Contract liabilities (deferred revenue)	46,564		43,720
Noncurrent contract liabilities (deferred revenue) (included in other long-term liabilities)	1,913		2,097
Net contract liabilities	$	(45,746)	$	(43,224)

The Company receives payments from customers based upon billing cycles. Invoice payment terms are usually 30 days or less. Accounts receivable are recorded when the right to consideration becomes unconditional.

Deferred contract acquisition costs are recorded when incurred and are amortized over an estimated customer benefit period of five years.

The Company’s contract assets consist of unbilled amounts typically resulting from professional services revenue recognition when it exceeds the total amounts billed to the customer. The Company’s contract liabilities consist of advance payments and billings in excess of revenue recognized.

In the three months ended March 31, 2022, the Company recognized revenue of $26.2 million related to its contract liabilities at December 31, 2021.

Remaining Performance Obligations

As of March 31, 2022, the aggregate amount of the total transaction price allocated in contracts with original duration of greater than one year to the remaining performance obligations was $602.8 million. The Company expects to recognize revenue on approximately three-fourths of the remaining performance obligations over the next 24 months, with the balance recognized thereafter. The Company has elected the optional exemption, which allows for the exclusion of the amounts for remaining performance obligations that are part of contracts with an original expected duration of one year or less. Such remaining performance obligations represent unsatisfied or partially unsatisfied performance obligations pursuant to ASC 606.

XML

Investments and Fair Value Measurements

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Investments and Fair Value Measurements

Investments and Fair Value MeasurementsMarketable Investments

The Company’s marketable investments have been classified and accounted for as available-for-sale. The Company’s marketable investments as of March 31, 2022 and December 31, 2021 were as follows (in thousands):

	March 31, 2022
Short-Term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	1,757	$	—	$	(3)	$	1,754
U.S. treasury	82,148		—		(365)		81,783
U.S. agency securities	145,428		—		(605)		144,823
Commercial paper	42,755		—		—		42,755
Municipal bonds	96,519		—		(457)		96,062
Corporate bonds	10,383		—		(41)		10,342
Total	$	378,990	$	—	$	(1,471)	$	377,519
	March 31, 2022
Long-term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	497	$	—	$	(8)	$	489
U.S. treasury	49,877		—		(1,061)		48,816
U.S. agency securities	63,969		—		(1,367)		62,602
Municipal bonds	6,944		—		(144)		6,800
Total	$	121,287	$	—	$	(2,580)	$	118,707

	December 31, 2021
Short-Term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	1,615	$	—	$	—	$	1,615
U.S. treasury	83,237		—		(24)		83,213
U.S. agency securities	159,070		—		(65)		159,005
Commercial paper	47,555		—		—		47,555
Municipal bonds	75,337		—		(96)		75,241
Corporate bonds	12,355		2		(6)		12,351
Total	$	379,169	$	2	$	(191)	$	378,980
	December 31, 2021
Long-term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	746	$	—	$	(2)	$	744
U.S. treasury	63,566		—		(251)		63,315
U.S. agency securities	63,960		—		(254)		63,706
Municipal bonds	18,655		—		(64)		18,591
Corporate bonds	1,026		—		(5)		1,021
Total	$	147,953	$	—	$	(576)	$	147,377

The following table presents the gross unrealized losses and the fair value for those marketable investments that were in an unrealized loss position for less than 12 months as of March 31, 2022 and December 31, 2021 (in thousands):

	March 31, 2022				December 31, 2021
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	(11)	$	2,243	$	(2)	$	2,010
U.S. treasury	(1,426)		125,714		(275)		140,527
U.S. agency securities	(1,972)		207,425		(320)		222,710
Municipal bonds	(601)		102,862		(160)		87,184
Corporate bonds	(41)		10,342		(10)		9,428
Total	$	(4,051)	$	448,586	$	(767)	$	461,859

Although the Company had certain available-for-sale debt securities in an unrealized loss position as of March 31, 2022, no impairment loss was recorded since it did not intend to sell them, did not anticipate a need to sell them, and the decline in fair value was not due to any credit-related factors.

The amortized cost and fair values of the Company’s marketable investments by contractual maturity as of March 31, 2022 and December 31, 2021 were as follows (in thousands):

	March 31, 2022				December 31, 2021
	Cost		Fair Value		Cost		Fair Value
Due within one year	$	378,990	$	377,519	$	379,169	$	378,980
Due after one year	121,287		118,707		147,953		147,377
Total	$	500,277	$	496,226	$	527,122	$	526,357

Fair Value Measurements

The Company carries cash equivalents and marketable investments at fair value. Fair value is based on the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

Level 1 — Observable inputs, which include unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2 — Observable inputs other than Level 1 inputs, such as quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 — Unobservable inputs that are supported by little or no market activity and that are based on management’s assumptions, including fair value measurements determined by using pricing models, discounted cash flow methodologies or similar techniques.

The Company determined the fair value of its Level 1 financial instruments, which are traded in active markets, using quoted market prices for identical instruments.

Marketable investments classified within Level 2 of the fair value hierarchy are valued based on other observable inputs, including broker or dealer quotations or alternative pricing sources. When quoted prices in active markets for identical assets or liabilities are not available, the Company relies on non-binding quotes from its investment managers, which are based on proprietary valuation models of independent pricing services. These models generally use inputs such as observable market data, quoted market prices for similar instruments, historical pricing trends of a security as relative to its peers. To validate the fair value determination provided by its investment managers, the Company reviews the pricing movement in the context of overall market trends and trading information from its investment managers. The Company performs routine procedures such as comparing prices obtained from independent source to ensure that appropriate fair values are recorded.

The following tables set forth the Company’s assets measured at fair value by level within the fair value hierarchy (in thousands):

	March 31, 2022
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	21,311	$	—	$	—	$	21,311
U.S. agency securities and government sponsored securities	—		200		—		200
Total cash equivalents	$	21,311	$	200	$	—	$	21,511
Marketable investments (short and long term)
Certificates of deposit	$	—	$	2,243	$	—	$	2,243
U.S. treasury	130,599		—		—		130,599
U.S. agency securities and government sponsored securities	—		207,425		—		207,425
Commercial paper	—		42,755		—		42,755
Municipal bonds	—		102,862		—		102,862
Corporate bonds	—		10,342		—		10,342
Total marketable investments	$	130,599	$	365,627	$	—	$	496,226
Liabilities
Contingent consideration	$	—	$	—	$	24,000	$	24,000

	December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	31,380	$	—	$	—	$	31,380
Certificates of deposit	—		747		—		747
Total cash equivalents	$	31,380	$	747	$	—	$	32,127
Marketable investments (short and long-term)
Certificates of deposit	$	—	$	2,359	$	—	$	2,359
U.S. treasury	146,528		—		—		146,528
U.S. agency and government sponsored securities	—		222,711		—		222,711
Commercial paper	—		47,555		—		47,555
Municipal bonds	—		93,832		—		93,832
Corporate bonds	—		13,372		—		13,372
Total marketable investments	$	146,528	$	379,829	$	—	$	526,357
Liabilities
Contingent consideration	$	—	$	—	$	23,740	$	23,740

As of March 31, 2022 and December 31, 2021, the estimated fair value of the Company’s outstanding 2023 convertible senior notes was $6.2 million and $114.9 million, respectively. As of March 31, 2022 and December 31, 2021, the estimated fair value of the Company's outstanding 2025 convertible senior notes was $812.1 million and $917.3 million, respectively. The fair values were determined based on the quoted price of the convertible senior notes in an inactive market on the last trading day of the reporting period and have been classified as Level 2 in the fair value hierarchy. See Note 6 for further information on the Company’s convertible senior notes.

As part of the agreement to acquire Inference Solutions Inc. ("Inference") in November 2020, the Company was obligated to pay contingent earn out consideration of up to $24.0 million based upon achievement of certain milestones and relative thresholds during the earn out measurement period which ended on December 31, 2021. The fair value of the contingent consideration arrangement was classified within Level 3 and was determined using a probability-based scenario analysis approach. The resulting probability-weighted contingent consideration amounts were discounted based on the Company’s estimated cost of debt. During the three months ended March 31, 2022, the Company concluded that the final contingent consideration amount was $24.0 million and recognized an additional $0.3 million of contingent consideration expense to adjust the fair value from $23.7 million at December 31, 2021 to $24.0 million at March 31, 2022. The Company paid the $24.0 million earn out consideration in April 2022.

A reconciliation of the beginning and ending balance for contingent consideration consisted of the following (in thousands):

	Three Months Ended March 31, 2022
Balance, beginning of period	$	23,740
Change in fair value of contingent consideration	260
Balance, end of period	$	24,000

In February 2022, the Company made a $2.0 million equity investment in a privately-held company that it does not have the ability to exercise significant influence over. The Company elected the measurement alternative for an equity security without a readily determinable fair value. Accordingly, this investment will be accounted for at its cost minus impairment, if any, and is classified within Level 3. If the Company identifies observable price changes in orderly transactions for such investment or a similar investment, it will measure the investment at fair value as of the date that the observable transaction occurred.

Except for the $2.0 million equity investment described above, there were no assets or liabilities measured at fair value on a non-recurring basis as of March 31, 2022 and December 31, 2021.

The fair value of the Company’s other financial instruments’ fair value, including accounts receivable, accounts payable and other current liabilities, approximate their carrying value due to the relatively short maturity of those instruments. The carrying amounts of the Company’s operating leases approximate their fair value, which is the present value of expected future cash payments based on assumptions about current interest rates and the creditworthiness of the Company.

XML

Financial Statement Components

3 Months Ended

Mar. 31, 2022

Financial Statement Components [Abstract]

Financial Statement Components

Financial Statement Components

Cash and cash equivalents consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Cash	$	78,640	$	58,751
Certificates of deposit	—		747
Money market funds	21,311		31,380
U.S. agency securities	200		—
Total cash and cash equivalents	$	100,151	$	90,878

Accounts receivable, net consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Trade accounts receivable	$	66,538	$	75,970
Unbilled trade accounts receivable, net of advance client deposits	11,607		7,981
Allowance for doubtful accounts	(233)		(220)
Accounts receivable, net	$	77,912	$	83,731

Prepaid expenses and other current assets consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Prepaid expenses	$	24,717	$	21,306
Other current assets	5,086		6,443
Contract assets	2,731		2,593
Prepaid expenses and other current assets	$	32,534	$	30,342

Property and equipment, net consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Computer and network equipment	$	136,645	$	116,701
Computer software	44,645		44,268
Internal-use software development costs	1,069		500
Furniture and fixtures	4,044		3,953
Leasehold improvements	6,032		5,914
Property and equipment	192,435		171,336
Accumulated depreciation and amortization	(100,959)		(93,551)
Property and equipment, net	$	91,476	$	77,785

Depreciation and amortization expense associated with property and equipment was $7.8 million and $5.8 million for the three months ended March 31, 2022 and 2021, respectively.

Property and equipment capitalized under finance lease obligations consists primarily of computer and network equipment and was as follows (in thousands):

	March 31, 2022		December 31, 2021
Gross	$	42,541	$	42,541
Less: accumulated depreciation and amortization	(42,022)		(41,689)
Total	$	519	$	852

Other assets consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Other assets	$	4,730	$	4,964
Equity investment	2,000		—
Deferred tax assets	5,018		6,907
Total	$	11,748	$	11,871

Accrued and other current liabilities consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Accrued expenses	$	22,764	$	20,108
Accrued compensation and benefits	44,647		34,729
Contingent consideration	24,000		23,740
Accrued and other current liabilities	$	91,411	$	78,577

Other long-term liabilities consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Deferred revenue	$	1,913	$	2,097
Other long-term liabilities	4,769		5,574
Other long-term liabilities	$	6,682	$	7,671

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Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill

There was no activity in the Company's goodwill balance during the three months ended March 31, 2022.

Intangible Assets

The following table summarizes the activity in the Company's intangible assets balance during the three months ended March 31, 2022 (in thousands):

	Three Months Ended March 31, 2022
Beginning of the period	$	39,897
Amortization	(2,947)
End of the period	$	36,950

The components of intangible assets were as follows (in thousands):

	March 31, 2022							December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Amortization period (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Amortization period (Years)
Developed technology	$	56,214	$	(20,586)	$	35,628	3.8	$	56,214	$	(17,821)	$	38,393	4.0
Acquired workforce	470		(373)		97		0.9	470		(334)		136		0.9
Customer relationships	1,600		(501)		1,099		3.5	1,600		(421)		1,179		3.7
Trademarks	500		(374)		126		0.7	500		(311)		189		0.9
Total	$	58,784	$	(21,834)	$	36,950	3.8	$	58,784	$	(18,887)	$	39,897	4.0

Amortization expense for intangible assets was $2.9 million and $2.9 million during the three months ended March 31, 2022 and 2021, respectively.

As of March 31, 2022, the expected future amortization expense for intangible assets was as follows (in thousands):

Period	Expected Future Amortization Expense
Remaining 2022	$	8,758
2023	10,870
2024	7,527
2025	5,595
2026	4,200
Thereafter	—
Total	$	36,950

XML

Debt

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Debt

Debt

2025 Convertible Senior Notes and Related Capped Call Transactions

In May and June 2020, the Company issued $747.5 million aggregate principal amount of 2025 convertible senior notes in a private offering, which aggregate principal amount included the exercise in full of the initial purchasers’ option to purchase up to an additional $97.5 million principal amount of the 2025 convertible senior

notes. The 2025 convertible senior notes mature on June 1, 2025 and bear interest at a fixed rate of 0.500% per annum, payable semiannually in arrears on June 1 and December 1 of each year, beginning on December 1, 2020. In addition, under the terms of the 2025 convertible senior notes, the Company was obligated to pay additional interest on the 2025 convertible senior notes at a rate equal to 0.500% per annum for the period from June 13, 2021 through July 8, 2021, after which such additional interest is no longer payable. The total net proceeds from the issuance of the 2025 convertible senior notes, after deducting initial purchasers' discounts and commissions and estimated debt issuance costs, were approximately $728.8 million.

Each $1,000 principal amount of the 2025 convertible senior notes is initially convertible into 7.4437 shares of the Company’s common stock (the “2025 Conversion Option”), which is equivalent to an initial conversion price of approximately $134.34 per share of common stock, subject to adjustment upon the occurrence of specified events. The initial conversion price represents a premium of approximately 30% to the $103.34 per share closing price of the Company’s common stock on The Nasdaq Global Market on May 21, 2020. The 2025 convertible senior notes are convertible, in multiples of $1,000 principal amount, at the option of the holders prior to the close of business on the business day immediately preceding March 1, 2025, only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on September 30, 2020 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “2025 Measurement Period”) in which the trading price (as defined in the 2025 Indenture governing the 2025 convertible senior notes) per $1,000 principal amount of the 2025 convertible senior notes for each trading day of the 2025 Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate in effect on each such trading day; (3) if the Company calls any or all of the 2025 convertible senior notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after March 1, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their 2025 convertible senior notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances. 

Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock, at the Company’s election. If the Company undergoes a fundamental change (as defined in the indenture governing the 2025 convertible senior notes), subject to certain conditions, holders may require the Company to repurchase for cash all or any portion of their 2025 convertible senior notes, in principal amounts of $1,000 or a multiple thereof, at a fundamental change repurchase price equal to 100% of the principal amount of the 2025 convertible senior notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the fundamental change repurchase date. In addition, following certain corporate events or if the Company issues a notice of redemption, it will, under certain circumstances, increase the conversion rate for holders who elect to convert their notes in connection with such corporate event or during the relevant redemption period.

There have been no changes to the initial conversion price of the 2025 convertible senior notes since issuance. The closing market price of the Company's common stock of $110.40 per share on March 31, 2022, the last trading day during the three months ended March 31, 2022, was below $174.64 per share, which represents 130% of the initial conversion price of $134.34 per share. Additionally, the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day, March 31, 2022, was not greater than or equal to 130% of the initial conversion price. As such, during the three months ended March 31, 2022, the conditions allowing holders of the 2025 convertible senior notes to convert were not met. The 2025 convertible senior notes are therefore not convertible for the three months ending June 30, 2022.

The Company may not redeem the 2025 convertible senior notes prior to June 6, 2023. The Company may redeem for cash all or any portion of the 2025 convertible senior notes, at its option, on or after June 6, 2023 and prior to March 1, 2025 if the last reported sale price of its common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending not more than two trading days immediately preceding the date on which the Company provides notice of redemption at a redemption price equal to 100% of the principal amount of the 2025 convertible senior notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. No sinking fund is provided for the 2025 convertible senior notes.

The 2025 convertible senior notes are the Company’s senior unsecured obligations and rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the 2025

convertible senior notes; equal in right of payment to any of the Company’s unsecured indebtedness that is not so subordinated (including the 2023 convertible senior notes); effectively junior in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of the Company’s subsidiaries.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the issuance of the 2025 convertible senior notes, the 2025 convertible senior notes were separated into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated conversion feature. The carrying amount of the equity component representing the 2025 Conversion Option was $158.3 million and was determined by deducting the fair value of the liability component from the par value of the 2025 convertible senior notes. The equity component was recorded in additional paid-in-capital and was not re-measured as long as it continued to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount (the “Debt Discount”) was amortized to interest expense over the contractual term of the 2025 convertible senior notes at an effective interest rate of 5.76%.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the debt issuance costs of $18.7 million related to the 2025 convertible senior notes, the Company allocated the total amount incurred to the liability and equity components of the 2025 convertible senior notes based on their relative values. Issuance costs attributable to the liability component were $14.7 million and were amortized to interest expense using the effective interest method over the contractual term of the 2025 convertible senior notes. Issuance costs attributable to the equity component were netted with the equity component in additional paid-in-capital.

On January 1, 2021, the Company elected to early adopt ASU 2020-06 based on a modified retrospective transition method. Under such transition, prior-period information has not been retrospectively adjusted.

In accounting for the 2025 convertible senior notes after adoption of ASU 2020-06, the 2025 convertible senior notes are accounted for as a single liability, and the carrying amount of the 2025 convertible senior notes is $735.6 million as of March 31, 2022, with principal of $747.5 million, net of issuance cost of $11.9 million. The 2025 senior convertible notes were classified as long term liabilities as of March 31, 2022. The issuance cost related to the 2025 convertible senior notes is being amortized to interest expense over the contractual term of the 2025 convertible senior notes at an effective interest rate of 1.0%.

The net carrying amount of the 2025 convertible senior notes as of March 31, 2022 and as of December 31, 2021 was as follows (in thousands):

	March 31, 2022		December 31, 2021
Principal	$	747,500	$	747,500
Unamortized issuance costs	(11,936)		(12,835)
Net carrying amount	$	735,564	$	734,665

Interest expense related to the 2025 convertible senior notes was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Contractual interest expense	$	934	$	934
Amortization of issuance costs	899		890
Total interest expense	$	1,833	$	1,824

In connection with the issuance of the 2025 convertible senior notes, the Company entered into privately negotiated capped call transactions (the “2025 Capped Call Transactions”) with certain financial institutions. The 2025 Capped Call Transactions are expected generally to reduce the potential dilution to the Company’s common stock in connection with any conversion of the 2025 convertible senior notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted 2025 convertible senior notes, as the case may be, with such reduction and/or offset subject to a cap based on the cap price. The initial cap price of the 2025 Capped Call Transactions was $206.68 per share and is subject to certain adjustments under the terms of the 2025 Capped Call Transactions. The 2025 Capped Call Transactions cover, subject to anti-dilution adjustments, approximately 5.6 million shares of the Company’s common stock. For accounting purposes, the 2025 Capped Call Transactions are separate transactions, and not integrated with the issuance of the 2025 convertible senior notes. As these transactions meet certain accounting criteria, the 2025 Capped Call Transactions are recorded in stockholders’ equity and are not accounted for as derivatives. The cost to the Company of the 2025 Capped Call Transactions was

$90.5 million during the year ended December 31, 2020, which was recorded as a reduction to additional paid-in capital.

Maturity of the Company’s 2025 convertible senior notes as of March 31, 2022 was as follows (in thousands):

Period	Amount to Mature
2025 (Maturity date of June 1, 2025)	$	747,500
Total	$	747,500

2023 Convertible Senior Notes and Related Capped Call Transactions

In May 2018, the Company issued $258.8 million aggregate principal amount of the 2023 convertible senior notes in a private offering. The 2023 convertible senior notes mature on May 1, 2023 and bear interest at a fixed rate of 0.125% per annum, payable semiannually in arrears on May 1 and November 1 of each year. The total net proceeds from the offering, after deducting initial purchasers' discounts and commissions and estimated debt issuance costs, was approximately $250.8 million.

In May 2020, the Company used part of the net proceeds from the issuance of the 2025 convertible senior notes to repurchase, exchange or otherwise retire approximately $181.0 million aggregate principal amount of the 2023 convertible senior notes in privately-negotiated transactions for aggregate consideration of $449.6 million, consisting of $181.0 million in cash and 2,723,581 shares of the Company’s common stock (the "2023 Note Repurchase Transactions").

As of March 31, 2022, after giving effect to the 2023 Note Repurchase Transactions and other settlements upon conversion requests, approximately $2.3 million aggregate principal amount of 2023 convertible senior notes remained outstanding.

Each $1,000 principal amount of the 2023 convertible senior notes was initially convertible into 24.4978 shares of the Company’s common stock (the “2023 Conversion Option”), which is equivalent to an initial conversion price of approximately $40.82 per share of common stock, subject to adjustment upon the occurrence of specified events. The 2023 convertible senior notes are convertible, in multiples of $1,000 principal amount, at the option of the holders at any time prior to the close of business on the business day immediately preceding November 1, 2022, only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ended on September 30, 2018 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “2023 Measurement Period”) in which the trading price (as defined in the indenture governing the 2023 convertible senior notes) per $1,000 principal amount of the 2023 convertible senior notes for each trading day of the 2023 Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate in effect on each such trading day; (3) if the Company calls any or all of the 2023 convertible senior notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after November 1, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their 2023 convertible senior notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances. 

Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock, at the Company’s election. If the Company undergoes a fundamental change (as defined in the indenture governing the 2023 convertible senior notes), subject to certain conditions, holders may require the Company to repurchase for cash all or any portion of their 2023 convertible senior notes, in principal amounts of $1,000 or a multiple thereof, at a fundamental change repurchase price equal to 100% of the principal amount of the 2023 convertible senior notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the fundamental change repurchase date. In addition, following certain corporate events that occur prior to the maturity date or if the Company issues a notice of redemption, it will, under certain circumstances, increase the conversion rate for holders who elect to convert their 2023 convertible senior notes in connection with such corporate event or during the relevant redemption period.

There have been no changes to the initial conversion price of the 2023 convertible senior notes since issuance. During each of the quarters from the third quarter of 2019 through the first quarter of 2022, one of the triggers for convertibility of the 2023 convertible senior notes was triggered as the last reported sale price of the Company’s

common stock was greater than $53.07 per share, which represents 130% of the initial conversion price of $40.82 per share, for at least 20 trading days in the period of 30 consecutive trading days ended on, and including, the last trading day of the quarter for each quarter of 2020 and 2021 and for the first quarter of 2022. As a result, the 2023 convertible senior notes were convertible, in multiples of $1,000 principal amount, at the option of the 2023 convertible senior note holders between October 1, 2019 to March 31, 2022, and are also currently convertible between April 1, 2022 to June 30, 2022. Whether the 2023 convertible senior notes will be convertible after June 30, 2022 will depend on the continued satisfaction of this condition or other conversion conditions in the future. During the three months ended March 31, 2022, the Company paid $31.9 million in cash and issued 540,130 shares of its common stock to settle aggregate principal amount of $31.9 million of its 2023 convertible senior notes. As of March 31, 2022, approximately $2.3 million aggregate principal amount of our 2023 convertible senior notes remained outstanding. The conversions that occurred during the three months ended March 31, 2022 were subject to ASU 2020-06 and such conversions were accounted for as contractual conversions, which did not result in any gain or loss upon their settlement.

During the three months ended March 31, 2022, the Company received an additional 111,416 shares from the partial unwind of capped calls resulting from the settlement of its 2023 convertible senior notes. The receipt of the 111,416 shares reduced the number of shares of common stock outstanding.

In addition, on or prior to March 31, 2022, the Company received elections to convert aggregate principal amount of $2.1 million of its 2023 convertible senior notes that remain unsettled as of the end of the first quarter of 2022. The Company expects to settle these conversions in cash or a combination of cash and shares during the second quarter of 2022. The Company has the option to settle any future election conversion notices in cash, shares, or a combination of cash and shares.

The 2023 convertible senior notes are the Company’s senior unsecured obligations and rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the 2023 convertible senior notes; equal in right of payment to any of the Company’s unsecured indebtedness that is not so subordinated (including the 2025 convertible senior notes); effectively junior in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of the Company’s subsidiaries.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the issuance of the 2023 convertible senior notes, the 2023 convertible senior notes were separated into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated conversion feature. The equity component was recorded in additional paid-in-capital and was not re-measured as long as it continued to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount (the "Debt Discount") was amortized to interest expense over the contractual term of the 2023 convertible senior notes at an effective interest rate of 6.39%.

Prior to the adoption of ASU 2020-06 on January 1, 2021 and in accounting for the debt issuance costs of $8.0 million related to the 2023 convertible senior notes, the Company allocated the total amount incurred to the liability and equity components of the 2023 convertible senior notes based on their relative values. Issuance costs attributable to the liability component were $6.0 million and were amortized to interest expense using the effective interest method over the contractual term of the 2023 convertible senior notes. Issuance costs attributable to the equity component were netted with the equity component in additional paid-in-capital.

After the adoption of ASU 2020-06, the 2023 convertible senior notes are accounted for as a single liability, and the carrying amount of the 2023 convertible senior notes was $2.3 million as of March 31, 2022, with principal of $2.3 million, net of issuance cost of $0.0 million. The 2023 senior convertible notes were classified as long term liabilities during the three months ended on March 31, 2022. The issuance cost related to the 2023 convertible senior notes is being amortized to interest expense over the contractual term of the 2023 convertible senior notes at an effective interest rate of 0.76%.

The net carrying amount of the 2023 convertible senior notes as of March 31, 2022 and as of December 31, 2021 was as follows (in thousands):

	March 31, 2022		December 31, 2021
Principal	$	2,317	$	34,225
Unamortized issuance costs	(16)		(291)
Net carrying amount	$	2,301	$	33,934

Interest expense related to the 2023 convertible senior notes was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Contractual interest expense	$	6	$	17
Amortization of issuance costs	31		84
Total interest expense	$	37	$	101

In connection with the issuance of the 2023 convertible senior notes, the Company entered into privately negotiated capped call transactions (the “2023 Capped Call Transactions”) with certain financial institutions. The 2023 Capped Call Transactions are expected generally to reduce the potential dilution to the Company’s common stock upon any conversion of the 2023 convertible senior notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted 2023 convertible senior notes, as the case may be, with such reduction and/or offset subject to a cap based on the cap price. The initial cap price of the 2023 Capped Call Transactions was $62.80 per share, and is subject to certain adjustments under the terms of the 2023 Capped Call Transactions. The 2023 Capped Call Transactions cover, subject to anti-dilution adjustments, approximately 6.3 million shares of the Company’s common stock. For accounting purposes, the 2023 Capped Call Transactions are separate transactions, and not integrated with the issuance of the 2023 convertible senior notes. As these transactions meet certain accounting criteria, the 2023 Capped Call Transactions are recorded in stockholders’ equity and are not accounted for as derivatives. The cost of $31.4 million incurred in connection with the 2023 Capped Call Transactions was recorded as a reduction to additional paid-in capital.

In connection with the 2023 Note Repurchase Transactions, the Company amended the 2023 Capped Call Transactions such that the portion associated with the 2023 convertible senior notes subject to the 2023 Note Repurchase Transactions would remain outstanding notwithstanding the retirement of $181.0 million aggregate principal amount of 2023 convertible senior notes. Following such amendment, the 2023 Capped Call Transactions continue to meet the accounting criteria to be recorded in stockholders’ equity and are not accounted for as derivatives.

Maturity of the Company’s 2023 convertible senior notes as of March 31, 2022 was as follows (in thousands):

Period	Amount to Mature
2023 (Maturity date of May 1, 2023)	$	2,317
Total	$	2,317

See Note 6 of the notes to consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 filed with the Securities and Exchange Commission on February 28, 2022 for further description of the convertible senior notes.

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Stockholders' Equity

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Capital Structure

Common Stock

The Company is authorized to issue 450,000,000 shares of common stock with a par value of $0.001 per share. As of March 31, 2022 and December 31, 2021, the Company had 69,521,562 and 68,488,337 shares of common stock issued and outstanding, respectively. During the three months ended March 31, 2022, the Company issued 540,130 shares of common stock in connection with 2023 convertible senior note settlements. During the three months ended March 31, 2022, the Company also received 111,416 shares from the partial unwind of capped calls resulting from the settlement of its 2023 convertible senior notes. The receipt of the 111,416 shares during the three months ended March 31, 2022 reduced the number of shares of common stock outstanding.

Preferred Stock

The Company is authorized to designate and issue up to 5,000,000 shares of preferred stock with a par value of $0.001 per share in one or more series without stockholder approval and to fix the rights, preferences, privileges and restrictions thereof. As of March 31, 2022 and December 31, 2021, there were no shares of preferred stock issued and outstanding.

Common Stock Reserved for Future Issuance

Shares of common stock reserved for future issuance related to outstanding equity awards and employee equity incentive plans were as follows (in thousands):

	March 31, 2022
Stock options outstanding	1,768
RSUs (including PRSUs) outstanding	3,236
Shares available for future grant under 2014 Plan	15,736
Shares available for future issuance under ESPP	3,761
Total shares of common stock reserved	24,501

Stock Options

A summary of the Company’s stock option activity during the three months ended March 31, 2022 is as follows (in thousands, except years and per share data):

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding as of December 31, 2021	1,982	$	38.65
Options granted (weighted average grant date fair value of $54.82 per share)	78	110.39
Options exercised	(281)	4.54
Options forfeited or expired	(11)	110.05
Outstanding as of March 31, 2022	1,768	$	46.78	2.6	$	123,988

The aggregate intrinsic value amounts are computed based on the difference between the exercise price of the stock options and the fair market value of the Company’s common stock of $110.40 per share as of March 31, 2022 for all in-the-money stock options outstanding.

Restricted Stock Units (including Performance-Based Restricted Stock Units)

A summary of the Company’s restricted stock unit ("RSU"), activity during the three months ended March 31, 2022 is as follows (in thousands, except per share data):     

	Number of Shares	Weighted Average Grant Date Fair Value Per Share
Outstanding as of December 31, 2021	2,560	$	125.65
RSUs granted(1)	1,072	112.03
RSUs vested and released	(323)	105.70
RSUs forfeited or canceled	(73)	123.68
Outstanding as of March 31, 2022	3,236	123.18

(1) Includes 59,383 PRSUs granted during the first quarter of 2022.

Performance-Based Restricted Stock Units

During the first quarter of 2022, the Company granted 59,383 performance-based restricted stock units (“PRSUs”), with a weighted average grant date fair value of $8.3 million, as part of its annual grant of equity incentive awards to certain executives. The amount that may be earned pursuant to the PRSUs ranges from 0% to 200% of the target number based on the Company’s relative total shareholder return (“RTSR”) performance as compared to the companies in the S&P Software and Services Select Index during three one-year performance periods consisting of the Company’s 2022, 2023 and 2024 fiscal years. One-third of the total PRSUs may be earned and settled in shares following the end of each one-year performance period based on RTSR performance and subject to continued employment through the payment date, but the amount initially paid for 2022 and 2023 is limited to 100% of the target amount for the year, and any PRSUs resulting from above-target performance in those years will be paid following the end of 2024, subject to the executive’s continued employment through the payment date. If the Company’s absolute total shareholder return for any performance period is negative, then no more than 100% of the target amount of PRSUs for such period may be earned. If an executive's employment with the Company terminates before the end of 2024 due to death or disability, 100% (if due to death) or 50% (if due to disability) of the unvested PRSUs may be earned subject to ultimate RTSR performance in each remaining performance period. Upon a qualifying termination of employment in connection with a change in control of the Company, the unvested PRSUs will vest on a double-trigger basis at the target level. The fair value of the PRSUs, which are subject to market and service conditions, are determined on their grant date using a Monte Carlo Simulation model based upon assumptions presented below. The Company recognizes the fair value of the PRSUs ratably over their requisite service period.

Stock-Based Compensation

Stock-based compensation expense was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cost of revenue	$	7,793	$	3,105
Research and development	10,145		4,763
Sales and marketing	13,424		6,771
General and administrative	8,032		6,269
Total stock-based compensation	$	39,394	$	20,908

As of March 31, 2022, unrecognized stock-based compensation expense by award type and their expected weighted-average recognition periods are summarized in the following table (in thousands, except years).

	Stock Option		RSU		PRSU		ESPP
Unrecognized stock-based compensation expense	$	22,048	$	366,400	$	7,847	$	861
Weighted-average amortization period	2.6 years		2.8 years		2.8 years		0.1 years

The weighted-average assumptions used to value stock options and PRSUs granted during the periods presented were as follows:

Stock Options	Three Months Ended
	March 31, 2022		March 31, 2021
Expected term (years)	6.0		6.0
Volatility	46.0	%	47.0	%
Risk-free interest rate	1.8	%	1.0	%
Dividend yield (1)	—		—
PRSUs	Three Months Ended
	March 31, 2022		March 31, 2021
Closing price of common stock as of grant date (February 28, 2022)	$110.00		—
Expected term (years)	2.84		—
Volatility	48.8	%	—
Risk-free interest rate	1.6	%	—
Dividend yield (1)	—		—

(1)The Company has not paid, and does not anticipate paying, cash dividends on its shares of common stock. Accordingly, the expected dividend yield is zero.

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Net Loss Per Share

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Net Loss Per Share

Net Loss Per Share

Basic net loss per share is calculated by dividing net loss by the weighted average number of shares of common stock outstanding during the period, and excludes any dilutive effects of employee stock-based awards and potential shares upon conversion of the convertible senior notes. Diluted net loss per share is computed giving effect to all potentially dilutive shares of common stock, including common stock issuable upon exercise of stock options, vesting of RSUs and PRSUs, and shares of common stock issuable upon conversion of convertible senior notes. As the Company had net losses for the three months ended March 31, 2022 and 2020, all potentially issuable shares of common stock were determined to be anti-dilutive.

The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data):

	Three Months Ended
	March 31, 2022		March 31, 2021
Net loss	$	(34,120)	$	(12,332)
Weighted-average shares used in computing basic and diluted net loss per share	68,974		66,721
Basic and diluted net loss per share	$	(0.49)	$	(0.18)

The following securities were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive (in thousands):

	Three Months Ended
	March 31, 2022	March 31, 2021
Stock options	1,768	2,244
RSUs (includes PRSUs)	3,236	2,515
Convertible senior notes	6,042	6,884
Total	11,046	11,643

The Company used the if-converted method for calculating any potential dilutive effect of its convertible senior notes for the three months ended March 31, 2022 and 2021. Under this method, the Company calculates diluted earnings per share under both the cash and share settlement assumptions to determine which is more dilutive. If share settlement is more dilutive, the Company calculates diluted earnings per share assuming that all of the convertible senior notes were converted solely into shares of common stock at the beginning of the reporting period. The potential impact upon the conversion of the convertible senior notes were excluded from the calculation of diluted net loss per share for the three months ended March 31, 2022 and 2021 because the effect would have been anti-dilutive.

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Income Taxes

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The provision for (benefit from) income taxes for the three months ended March 31, 2022 and 2021 was approximately $2.3 million and $(0.5) million, respectively. The provision for income taxes for the three months ended March 31, 2022 consisted primarily of foreign income tax expense from the intercompany sale of the Company's Australian intellectual property to the United States. The benefit from income taxes for the three months ended March 31, 2021 consisted primarily of foreign income tax benefit offset by domestic state minimum taxes.

For the three months ended March 31, 2022, the provision for income taxes differed from the statutory amount primarily due to foreign income taxes and the Company realizing no benefit for current year domestic losses due to maintaining a full valuation allowance against its domestic net deferred tax assets. For the three months ended March 31, 2021, the benefit from income taxes differed from the statutory amount primarily due to state and foreign income taxes and the Company realizing no benefit for current year domestic losses due to maintaining a full valuation allowance against its domestic net deferred tax assets.

The realization of tax benefits of deferred tax assets is dependent upon future levels of taxable income, of an appropriate character, in the periods the items are expected to be deductible or taxable. Based on the available objective evidence, the Company does not believe it is more likely than not that the net deferred tax assets will be realizable. Accordingly, the Company has provided a full valuation allowance against the domestic net deferred tax assets as of March 31, 2022 and December 31, 2021. The Company intends to maintain the remaining valuation allowance until sufficient positive evidence exists to support a reversal of, or decrease in, the valuation allowance. During the three months ended March 31, 2022, there were no material changes to the total amount of unrecognized tax benefits.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments

The Company’s principal commitments consist of future payment obligations under its convertible senior notes, finance leases to finance data centers and other computer and networking equipment purchases, operating leases for office facilities, cloud services agreement, and agreements with third parties to provide co-location hosting, telecommunication usage and equipment maintenance services. These commitments as of December 31, 2021 are disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, and did not change materially during the three months ended March 31, 2022, except for certain hosting and telecommunications agreements, cloud service agreements, the convertible senior notes, the contingent consideration described in Note 3, and the operating leases described in Note 12.

As of March 31, 2022, the Company’s commitment under various hosting and telecommunications agreements totaled $19.5 million for terms ranging up to 60 months. These agreements require the Company to make monthly payments over the service term in exchange for certain network services.

As of March 31, 2022, we had outstanding cloud service agreement commitments totaling $55.4 million, of which $12.6 million is expected to be paid in the remainder of 2022 and the remaining $42.8 million in 2023.

As of March 31, 2022, $749.8 million of aggregate principal of the convertible senior notes were outstanding. The 2023 convertible senior notes and the 2025 convertible senior notes are due on May 1, 2023 and June 1, 2025, respectively. See Note 6 for more information concerning the convertible senior notes.

Legal Matters

The Company is involved in various legal and regulatory matters arising in the normal course of business. In management’s opinion, resolution of these matters is not expected to have a material impact on the Company’s consolidated results of operations, cash flows, or its financial position. However, due to the uncertain nature of legal

matters, an unfavorable resolution of a matter could materially affect the Company’s future consolidated results of operations, cash flows or financial position in a particular period. The Company expenses legal fees as incurred.

Indemnification Agreements

In the ordinary course of business, the Company enters into agreements of varying scope and terms pursuant to which it agrees to indemnify clients, vendors, lessors, business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, including breach of security, services to be provided by the Company or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with its directors, officers and certain employees that requires it, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees. There are no claims that the Company is aware of that could have a material effect on the consolidated balance sheet, consolidated statement of operations and comprehensive loss, or consolidated statements of cash flows.

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Geographical Information

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Geographical Information

Geographical Information

The following table summarizes revenues by geographic region based on client billing address (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
United States	$	167,247	$	125,886
International	15,530		11,996
Total revenue	$	182,777	$	137,882

The following table summarizes total property and equipment, net in the respective locations (in thousands):

	March 31, 2022		December 31, 2021
United States	$	82,645	$	68,674
International	8,831		9,111
Property and equipment, net	$	91,476	$	77,785

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Leases

3 Months Ended

Mar. 31, 2022

Leases [Abstract]

Leases

Leases

The Company has leases for offices, data centers and computer and networking equipment that expire at various dates through 2031. The Company’s leases have remaining terms of one to ten years, some of the leases include a Company option to extend the leases for up to three to five years, and some of the leases include the option to terminate the leases upon 30-days notice. The Company has elected the practical expedient to not separate lease and non-lease components for real estate operating leases.

The components of lease expenses were as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Operating lease cost	$	2,900	$	2,668
Finance lease cost:
Amortization of right-of-use assets	$	333	$	717
Interest on finance lease liabilities	—		13
Total finance lease cost	$	333	$	730

Supplemental cash flow information related to leases was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash used in operating leases	$	(2,709)	$	(2,038)
Financing cash used in finance leases	—		(456)
Right of use assets obtained in exchange for lease obligations:
Operating leases	236		38,339
Finance leases	—		—

Supplemental balance sheet information related to leases was as follows (in thousands):

	March 31, 2022		December 31, 2021
Operating leases
Operating lease right-of-use assets	$	46,536	$	48,703
Operating lease liabilities	$	10,135	$	9,826
Operating lease liabilities — less current portion	44,818		47,088
Total operating lease liabilities	$	54,953	$	56,914
Finance leases
Property and equipment, gross	$	42,541	$	42,541
Less: accumulated depreciation and amortization	(42,022)		(41,689)
Property and equipment, net	$	519	$	852

Weighted average remaining terms were as follows (in years):

	March 31, 2022	December 31, 2021
Weighted average remaining lease term
Operating leases	7.1	7.3

Weighted average discount rates were as follows:

	March 31, 2022		December 31, 2021
Weighted average discount rate
Operating leases	3.2	%	3.2	%

Maturities of lease liabilities were as follows (in thousands):

Year Ending December 31,	Operating Leases
Remaining 2022	$	8,744
2023	10,739
2024	7,870
2025	5,613
2026	5,773
Thereafter	22,875
Total future minimum lease payments	61,614
Less: imputed interest	(6,661)
Total	$	54,953

As of March 31, 2022, the Company entered into an additional data center operating lease that had not yet commenced, representing a total commitment over its term of $0.3 million. This data center lease commenced on April 1, 2022, with a lease term of three years.

Leases

Leases

The Company has leases for offices, data centers and computer and networking equipment that expire at various dates through 2031. The Company’s leases have remaining terms of one to ten years, some of the leases include a Company option to extend the leases for up to three to five years, and some of the leases include the option to terminate the leases upon 30-days notice. The Company has elected the practical expedient to not separate lease and non-lease components for real estate operating leases.

The components of lease expenses were as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Operating lease cost	$	2,900	$	2,668
Finance lease cost:
Amortization of right-of-use assets	$	333	$	717
Interest on finance lease liabilities	—		13
Total finance lease cost	$	333	$	730

Supplemental cash flow information related to leases was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash used in operating leases	$	(2,709)	$	(2,038)
Financing cash used in finance leases	—		(456)
Right of use assets obtained in exchange for lease obligations:
Operating leases	236		38,339
Finance leases	—		—

Supplemental balance sheet information related to leases was as follows (in thousands):

	March 31, 2022		December 31, 2021
Operating leases
Operating lease right-of-use assets	$	46,536	$	48,703
Operating lease liabilities	$	10,135	$	9,826
Operating lease liabilities — less current portion	44,818		47,088
Total operating lease liabilities	$	54,953	$	56,914
Finance leases
Property and equipment, gross	$	42,541	$	42,541
Less: accumulated depreciation and amortization	(42,022)		(41,689)
Property and equipment, net	$	519	$	852

Weighted average remaining terms were as follows (in years):

	March 31, 2022	December 31, 2021
Weighted average remaining lease term
Operating leases	7.1	7.3

Weighted average discount rates were as follows:

	March 31, 2022		December 31, 2021
Weighted average discount rate
Operating leases	3.2	%	3.2	%

Maturities of lease liabilities were as follows (in thousands):

Year Ending December 31,	Operating Leases
Remaining 2022	$	8,744
2023	10,739
2024	7,870
2025	5,613
2026	5,773
Thereafter	22,875
Total future minimum lease payments	61,614
Less: imputed interest	(6,661)
Total	$	54,953

As of March 31, 2022, the Company entered into an additional data center operating lease that had not yet commenced, representing a total commitment over its term of $0.3 million. This data center lease commenced on April 1, 2022, with a lease term of three years.

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Description of Business and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. All intercompany transactions and balances have been eliminated in consolidation.

Use of Estimates

Use of Estimates The preparation of condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The significant estimates made by management affect revenue and related reserves, as well as the fair value of liabilities assumed through business combinations. Management periodically evaluates such estimates and they are adjusted prospectively based upon such periodic evaluation. Actual results could differ from those estimates.

Internal-use software development costs

Internal-use software development costsThe Company capitalizes certain qualifying costs incurred during the development stage of internal-use software. Costs related to preliminary project activities and post-implementation activities are expensed in research and development as incurred. Preliminary project activities include conceptual formulation, evaluation and final selection of alternatives, planning, proof of concept and requirement analysis of the selected alternative. Post-implementation stage begins when the inter-use software is ready for its intended use, and includes all internal and external training and application maintenance activities. Capitalized internal-use software costs are included within property and equipment, net on the condensed consolidated balance sheets, and are amortized over the estimated useful life of the software, which is typically three years. The related amortization expense is recognized in cost of revenue.

Recent Accounting Pronouncements Not Yet Effective

Recent Accounting Pronouncements Not Yet Effective

The Company has reviewed or is in the process of evaluating all issued, but not yet effective, accounting pronouncements and does not believe the future adoption of any such accounting pronouncements will cause a material impact on its condensed consolidated financial position, operating results or cash flows.

Receivables

The Company receives payments from customers based upon billing cycles. Invoice payment terms are usually 30 days or less. Accounts receivable are recorded when the right to consideration becomes unconditional.

Deferred Contract Acquisition

Deferred contract acquisition costs are recorded when incurred and are amortized over an estimated customer benefit period of five years.

Revenue

The Company’s contract assets consist of unbilled amounts typically resulting from professional services revenue recognition when it exceeds the total amounts billed to the customer. The Company’s contract liabilities consist of advance payments and billings in excess of revenue recognized.

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Revenue (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Contract Balances

The following table provides information about accounts receivable, net, deferred contract acquisition costs, net, contract assets and contract liabilities from contracts with customers (in thousands):

	March 31, 2022		December 31, 2021
Accounts receivable, net	$	77,912	$	83,731
Deferred contract acquisition costs, net:
Current	$	36,478	$	33,295
Non-current	92,964		84,663
Total deferred contract acquisition costs, net	$	129,442	$	117,958
Contract assets and contract liabilities:
Contract assets (included in prepaid expenses and other current assets)	$	2,731	$	2,593
Contract liabilities (deferred revenue)	46,564		43,720
Noncurrent contract liabilities (deferred revenue) (included in other long-term liabilities)	1,913		2,097
Net contract liabilities	$	(45,746)	$	(43,224)

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Investments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Marketable Investments

The Company’s marketable investments have been classified and accounted for as available-for-sale. The Company’s marketable investments as of March 31, 2022 and December 31, 2021 were as follows (in thousands):

	March 31, 2022
Short-Term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	1,757	$	—	$	(3)	$	1,754
U.S. treasury	82,148		—		(365)		81,783
U.S. agency securities	145,428		—		(605)		144,823
Commercial paper	42,755		—		—		42,755
Municipal bonds	96,519		—		(457)		96,062
Corporate bonds	10,383		—		(41)		10,342
Total	$	378,990	$	—	$	(1,471)	$	377,519
	March 31, 2022
Long-term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	497	$	—	$	(8)	$	489
U.S. treasury	49,877		—		(1,061)		48,816
U.S. agency securities	63,969		—		(1,367)		62,602
Municipal bonds	6,944		—		(144)		6,800
Total	$	121,287	$	—	$	(2,580)	$	118,707

	December 31, 2021
Short-Term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	1,615	$	—	$	—	$	1,615
U.S. treasury	83,237		—		(24)		83,213
U.S. agency securities	159,070		—		(65)		159,005
Commercial paper	47,555		—		—		47,555
Municipal bonds	75,337		—		(96)		75,241
Corporate bonds	12,355		2		(6)		12,351
Total	$	379,169	$	2	$	(191)	$	378,980
	December 31, 2021
Long-term Marketable Investments	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	746	$	—	$	(2)	$	744
U.S. treasury	63,566		—		(251)		63,315
U.S. agency securities	63,960		—		(254)		63,706
Municipal bonds	18,655		—		(64)		18,591
Corporate bonds	1,026		—		(5)		1,021
Total	$	147,953	$	—	$	(576)	$	147,377

Schedule of Gross Unrealized Losses and Fair Value of Marketable Investments

The following table presents the gross unrealized losses and the fair value for those marketable investments that were in an unrealized loss position for less than 12 months as of March 31, 2022 and December 31, 2021 (in thousands):

	March 31, 2022				December 31, 2021
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	(11)	$	2,243	$	(2)	$	2,010
U.S. treasury	(1,426)		125,714		(275)		140,527
U.S. agency securities	(1,972)		207,425		(320)		222,710
Municipal bonds	(601)		102,862		(160)		87,184
Corporate bonds	(41)		10,342		(10)		9,428
Total	$	(4,051)	$	448,586	$	(767)	$	461,859

Schedule of Marketable Investments by Contractual Maturity

The amortized cost and fair values of the Company’s marketable investments by contractual maturity as of March 31, 2022 and December 31, 2021 were as follows (in thousands):

	March 31, 2022				December 31, 2021
	Cost		Fair Value		Cost		Fair Value
Due within one year	$	378,990	$	377,519	$	379,169	$	378,980
Due after one year	121,287		118,707		147,953		147,377
Total	$	500,277	$	496,226	$	527,122	$	526,357

Schedule of Assets Carried at Fair Value

The following tables set forth the Company’s assets measured at fair value by level within the fair value hierarchy (in thousands):

	March 31, 2022
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	21,311	$	—	$	—	$	21,311
U.S. agency securities and government sponsored securities	—		200		—		200
Total cash equivalents	$	21,311	$	200	$	—	$	21,511
Marketable investments (short and long term)
Certificates of deposit	$	—	$	2,243	$	—	$	2,243
U.S. treasury	130,599		—		—		130,599
U.S. agency securities and government sponsored securities	—		207,425		—		207,425
Commercial paper	—		42,755		—		42,755
Municipal bonds	—		102,862		—		102,862
Corporate bonds	—		10,342		—		10,342
Total marketable investments	$	130,599	$	365,627	$	—	$	496,226
Liabilities
Contingent consideration	$	—	$	—	$	24,000	$	24,000

	December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	31,380	$	—	$	—	$	31,380
Certificates of deposit	—		747		—		747
Total cash equivalents	$	31,380	$	747	$	—	$	32,127
Marketable investments (short and long-term)
Certificates of deposit	$	—	$	2,359	$	—	$	2,359
U.S. treasury	146,528		—		—		146,528
U.S. agency and government sponsored securities	—		222,711		—		222,711
Commercial paper	—		47,555		—		47,555
Municipal bonds	—		93,832		—		93,832
Corporate bonds	—		13,372		—		13,372
Total marketable investments	$	146,528	$	379,829	$	—	$	526,357
Liabilities
Contingent consideration	$	—	$	—	$	23,740	$	23,740

Summary of the Changes for Contingent Consideration Liabilities

A reconciliation of the beginning and ending balance for contingent consideration consisted of the following (in thousands):

	Three Months Ended March 31, 2022
Balance, beginning of period	$	23,740
Change in fair value of contingent consideration	260
Balance, end of period	$	24,000

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Financial Statement Components (Tables)

3 Months Ended

Mar. 31, 2022

Financial Statement Components [Abstract]

Schedule of Cash and Cash Equivalents

Cash and cash equivalents consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Cash	$	78,640	$	58,751
Certificates of deposit	—		747
Money market funds	21,311		31,380
U.S. agency securities	200		—
Total cash and cash equivalents	$	100,151	$	90,878

Schedule of Accounts Receivable

Accounts receivable, net consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Trade accounts receivable	$	66,538	$	75,970
Unbilled trade accounts receivable, net of advance client deposits	11,607		7,981
Allowance for doubtful accounts	(233)		(220)
Accounts receivable, net	$	77,912	$	83,731

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Prepaid expenses	$	24,717	$	21,306
Other current assets	5,086		6,443
Contract assets	2,731		2,593
Prepaid expenses and other current assets	$	32,534	$	30,342

Schedule of Property and Equipment

Property and equipment, net consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Computer and network equipment	$	136,645	$	116,701
Computer software	44,645		44,268
Internal-use software development costs	1,069		500
Furniture and fixtures	4,044		3,953
Leasehold improvements	6,032		5,914
Property and equipment	192,435		171,336
Accumulated depreciation and amortization	(100,959)		(93,551)
Property and equipment, net	$	91,476	$	77,785

Property and equipment capitalized under finance lease obligations consists primarily of computer and network equipment and was as follows (in thousands):

	March 31, 2022		December 31, 2021
Gross	$	42,541	$	42,541
Less: accumulated depreciation and amortization	(42,022)		(41,689)
Total	$	519	$	852

Schedule of Other Assets

Other assets consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Other assets	$	4,730	$	4,964
Equity investment	2,000		—
Deferred tax assets	5,018		6,907
Total	$	11,748	$	11,871

Schedule of Accrued and Other Current Liabilities

Accrued and other current liabilities consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Accrued expenses	$	22,764	$	20,108
Accrued compensation and benefits	44,647		34,729
Contingent consideration	24,000		23,740
Accrued and other current liabilities	$	91,411	$	78,577

Schedule of Long-term Liabilities

Other long-term liabilities consisted of the following (in thousands):

	March 31, 2022		December 31, 2021
Deferred revenue	$	1,913	$	2,097
Other long-term liabilities	4,769		5,574
Other long-term liabilities	$	6,682	$	7,671

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Activity

The following table summarizes the activity in the Company's intangible assets balance during the three months ended March 31, 2022 (in thousands):

	Three Months Ended March 31, 2022
Beginning of the period	$	39,897
Amortization	(2,947)
End of the period	$	36,950

Schedule of Intangible Assets

The components of intangible assets were as follows (in thousands):

	March 31, 2022							December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Amortization period (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Amortization period (Years)
Developed technology	$	56,214	$	(20,586)	$	35,628	3.8	$	56,214	$	(17,821)	$	38,393	4.0
Acquired workforce	470		(373)		97		0.9	470		(334)		136		0.9
Customer relationships	1,600		(501)		1,099		3.5	1,600		(421)		1,179		3.7
Trademarks	500		(374)		126		0.7	500		(311)		189		0.9
Total	$	58,784	$	(21,834)	$	36,950	3.8	$	58,784	$	(18,887)	$	39,897	4.0

Schedule of Expected Future Amortization Expense of Intangible Assets

As of March 31, 2022, the expected future amortization expense for intangible assets was as follows (in thousands):

Period	Expected Future Amortization Expense
Remaining 2022	$	8,758
2023	10,870
2024	7,527
2025	5,595
2026	4,200
Thereafter	—
Total	$	36,950

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Debt (Tables)

3 Months Ended

Mar. 31, 2022

Convertible Senior Notes, Due 2025

Debt Instrument [Line Items]

Schedule of Net Carrying Amount of Notes and Impact to Additional Paid-in Capital

The net carrying amount of the 2025 convertible senior notes as of March 31, 2022 and as of December 31, 2021 was as follows (in thousands):

	March 31, 2022		December 31, 2021
Principal	$	747,500	$	747,500
Unamortized issuance costs	(11,936)		(12,835)
Net carrying amount	$	735,564	$	734,665

Schedule of Interest Expense Related to the Notes

Interest expense related to the 2025 convertible senior notes was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Contractual interest expense	$	934	$	934
Amortization of issuance costs	899		890
Total interest expense	$	1,833	$	1,824

Schedule of Maturities of Debt

Maturity of the Company’s 2025 convertible senior notes as of March 31, 2022 was as follows (in thousands):

Period	Amount to Mature
2025 (Maturity date of June 1, 2025)	$	747,500
Total	$	747,500

Convertible Senior Notes, Due 2023

Debt Instrument [Line Items]

Schedule of Net Carrying Amount of Notes and Impact to Additional Paid-in Capital

The net carrying amount of the 2023 convertible senior notes as of March 31, 2022 and as of December 31, 2021 was as follows (in thousands):

	March 31, 2022		December 31, 2021
Principal	$	2,317	$	34,225
Unamortized issuance costs	(16)		(291)
Net carrying amount	$	2,301	$	33,934

Schedule of Interest Expense Related to the Notes

Interest expense related to the 2023 convertible senior notes was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Contractual interest expense	$	6	$	17
Amortization of issuance costs	31		84
Total interest expense	$	37	$	101

Schedule of Maturities of Debt

Maturity of the Company’s 2023 convertible senior notes as of March 31, 2022 was as follows (in thousands):

Period	Amount to Mature
2023 (Maturity date of May 1, 2023)	$	2,317
Total	$	2,317

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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Schedule of Common Stock Reserved for Future Issuance

Shares of common stock reserved for future issuance related to outstanding equity awards and employee equity incentive plans were as follows (in thousands):

	March 31, 2022
Stock options outstanding	1,768
RSUs (including PRSUs) outstanding	3,236
Shares available for future grant under 2014 Plan	15,736
Shares available for future issuance under ESPP	3,761
Total shares of common stock reserved	24,501

Schedule of Stock Option Activity

A summary of the Company’s stock option activity during the three months ended March 31, 2022 is as follows (in thousands, except years and per share data):

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding as of December 31, 2021	1,982	$	38.65
Options granted (weighted average grant date fair value of $54.82 per share)	78	110.39
Options exercised	(281)	4.54
Options forfeited or expired	(11)	110.05
Outstanding as of March 31, 2022	1,768	$	46.78	2.6	$	123,988

Schedule of RSU Activity

A summary of the Company’s restricted stock unit ("RSU"), activity during the three months ended March 31, 2022 is as follows (in thousands, except per share data):     

	Number of Shares	Weighted Average Grant Date Fair Value Per Share
Outstanding as of December 31, 2021	2,560	$	125.65
RSUs granted(1)	1,072	112.03
RSUs vested and released	(323)	105.70
RSUs forfeited or canceled	(73)	123.68
Outstanding as of March 31, 2022	3,236	123.18

(1) Includes 59,383 PRSUs granted during the first quarter of 2022.

Schedule of Stock-based Compensation Expense

Stock-based compensation expense was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cost of revenue	$	7,793	$	3,105
Research and development	10,145		4,763
Sales and marketing	13,424		6,771
General and administrative	8,032		6,269
Total stock-based compensation	$	39,394	$	20,908

Schedule of Unrecognized Compensation Expense

As of March 31, 2022, unrecognized stock-based compensation expense by award type and their expected weighted-average recognition periods are summarized in the following table (in thousands, except years).

	Stock Option		RSU		PRSU		ESPP
Unrecognized stock-based compensation expense	$	22,048	$	366,400	$	7,847	$	861
Weighted-average amortization period	2.6 years		2.8 years		2.8 years		0.1 years

Schedule of Valuation Assumptions, Stock Option

The weighted-average assumptions used to value stock options and PRSUs granted during the periods presented were as follows:

Stock Options	Three Months Ended
	March 31, 2022		March 31, 2021
Expected term (years)	6.0		6.0
Volatility	46.0	%	47.0	%
Risk-free interest rate	1.8	%	1.0	%
Dividend yield (1)	—		—
PRSUs	Three Months Ended
	March 31, 2022		March 31, 2021
Closing price of common stock as of grant date (February 28, 2022)	$110.00		—
Expected term (years)	2.84		—
Volatility	48.8	%	—
Risk-free interest rate	1.6	%	—
Dividend yield (1)	—		—

(1)The Company has not paid, and does not anticipate paying, cash dividends on its shares of common stock. Accordingly, the expected dividend yield is zero.

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Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data):

	Three Months Ended
	March 31, 2022		March 31, 2021
Net loss	$	(34,120)	$	(12,332)
Weighted-average shares used in computing basic and diluted net loss per share	68,974		66,721
Basic and diluted net loss per share	$	(0.49)	$	(0.18)

Schedule of Antidilutive Securities Excluded from Computation of Net Loss Per Share

The following securities were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive (in thousands):

	Three Months Ended
	March 31, 2022	March 31, 2021
Stock options	1,768	2,244
RSUs (includes PRSUs)	3,236	2,515
Convertible senior notes	6,042	6,884
Total	11,046	11,643

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Geographical Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Revenues and Property and Equipment by Geographic Region

The following table summarizes revenues by geographic region based on client billing address (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
United States	$	167,247	$	125,886
International	15,530		11,996
Total revenue	$	182,777	$	137,882

The following table summarizes total property and equipment, net in the respective locations (in thousands):

	March 31, 2022		December 31, 2021
United States	$	82,645	$	68,674
International	8,831		9,111
Property and equipment, net	$	91,476	$	77,785

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Leases (Tables)

3 Months Ended

Mar. 31, 2022

Leases [Abstract]

Schedule of Lease Expenses

The components of lease expenses were as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Operating lease cost	$	2,900	$	2,668
Finance lease cost:
Amortization of right-of-use assets	$	333	$	717
Interest on finance lease liabilities	—		13
Total finance lease cost	$	333	$	730

Supplemental cash flow information related to leases was as follows (in thousands):

	Three Months Ended
	March 31, 2022		March 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash used in operating leases	$	(2,709)	$	(2,038)
Financing cash used in finance leases	—		(456)
Right of use assets obtained in exchange for lease obligations:
Operating leases	236		38,339
Finance leases	—		—

Weighted average remaining terms were as follows (in years):

	March 31, 2022	December 31, 2021
Weighted average remaining lease term
Operating leases	7.1	7.3

Weighted average discount rates were as follows:

	March 31, 2022		December 31, 2021
Weighted average discount rate
Operating leases	3.2	%	3.2	%

Schedule of Balance Sheet Information Related to Leases

Supplemental balance sheet information related to leases was as follows (in thousands):

	March 31, 2022		December 31, 2021
Operating leases
Operating lease right-of-use assets	$	46,536	$	48,703
Operating lease liabilities	$	10,135	$	9,826
Operating lease liabilities — less current portion	44,818		47,088
Total operating lease liabilities	$	54,953	$	56,914
Finance leases
Property and equipment, gross	$	42,541	$	42,541
Less: accumulated depreciation and amortization	(42,022)		(41,689)
Property and equipment, net	$	519	$	852

Schedule of Operating Lease Maturities

Maturities of lease liabilities were as follows (in thousands):

Year Ending December 31,	Operating Leases
Remaining 2022	$	8,744
2023	10,739
2024	7,870
2025	5,613
2026	5,773
Thereafter	22,875
Total future minimum lease payments	61,614
Less: imputed interest	(6,661)
Total	$	54,953

Schedule of Finance Lease Maturities

Maturities of lease liabilities were as follows (in thousands):

Year Ending December 31,	Operating Leases
Remaining 2022	$	8,744
2023	10,739
2024	7,870
2025	5,613
2026	5,773
Thereafter	22,875
Total future minimum lease payments	61,614
Less: imputed interest	(6,661)
Total	$	54,953

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Description of Business and Summary of Significant Accounting Policies (Details)	3 Months Ended
	Mar. 31, 2022
Internal-use software development costs
Property, Plant and Equipment [Line Items]
Useful life (in years)	3 years

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Revenue - Contract Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 77,912	$ 83,731
Deferred contract acquisition costs, net:
Current	36,478	33,295
Non-current	92,964	84,663
Total deferred contract acquisition costs, net	129,442	117,958
Contract assets and contract liabilities:
Contract assets (included in prepaid expenses and other current assets)	2,731	2,593
Contract liabilities (deferred revenue)	46,564	43,720
Noncurrent contract liabilities (deferred revenue) (included in other long-term liabilities)	1,913	2,097
Net contract liabilities	$ (45,746)	$ (43,224)

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Revenue - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract revenue recognized	$ 26.2
Contract acquisition costs
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Amortization period of capitalized contract cost	5 years

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Revenue - Remaining Performance Obligations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Revenue from Contract with Customer [Abstract]
Performance obligation	$ 602.8
Performance obligation, description of timing	The Company expects to recognize revenue on approximately three-fourths of the remaining performance obligations over the next 24 months, with the balance recognized thereafter. The Company has elected the optional exemption, which allows for the exclusion of the amounts for remaining performance obligations that are part of contracts with an original expected duration of one year or less. Such remaining performance obligations represent unsatisfied or partially unsatisfied performance obligations pursuant to ASC 606
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation	$ 602.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation expected to be recognized (percent)	75.00%
Performance obligation satisfaction period	24 months

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Investments and Fair Value Measurements - Schedule of Marketable Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Cost	$ 500,277	$ 527,122
Fair Value	496,226	526,357
Short-Term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	378,990	379,169
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(1,471)	(191)
Fair Value	377,519	378,980
Long-term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	121,287	147,953
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,580)	(576)
Fair Value	118,707	147,377
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Fair Value	2,243	2,359
Certificates of deposit | Short-Term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	1,757	1,615
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3)	0
Fair Value	1,754	1,615
Certificates of deposit | Long-term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	497	746
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(8)	(2)
Fair Value	489	744
U.S. treasury
Debt Securities, Available-for-sale [Line Items]
Fair Value	130,599	146,528
U.S. treasury | Short-Term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	82,148	83,237
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(365)	(24)
Fair Value	81,783	83,213
U.S. treasury | Long-term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	49,877	63,566
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,061)	(251)
Fair Value	48,816	63,315
U.S. agency securities | Short-Term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	145,428	159,070
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(605)	(65)
Fair Value	144,823	159,005
U.S. agency securities | Long-term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	63,969	63,960
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,367)	(254)
Fair Value	62,602	63,706
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Fair Value	42,755	47,555
Commercial paper | Short-Term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	42,755	47,555
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	42,755	47,555
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Fair Value	102,862	93,832
Municipal bonds | Short-Term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	96,519	75,337
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(457)	(96)
Fair Value	96,062	75,241
Municipal bonds | Long-term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	6,944	18,655
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(144)	(64)
Fair Value	6,800	18,591
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Fair Value	10,342	13,372
Corporate bonds | Short-Term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost	10,383	12,355
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(41)	(6)
Fair Value	$ 10,342	12,351
Corporate bonds | Long-term Marketable Investments
Debt Securities, Available-for-sale [Line Items]
Cost		1,026
Gross Unrealized Gains		0
Gross Unrealized Losses		(5)
Fair Value		$ 1,021

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Investments and Fair Value Measurements - Schedule of Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	$ (4,051)	$ (767)
Fair Value	448,586	461,859
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	(11)	(2)
Fair Value	2,243	2,010
U.S. treasury
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	(1,426)	(275)
Fair Value	125,714	140,527
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	(1,972)	(320)
Fair Value	207,425	222,710
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	(601)	(160)
Fair Value	102,862	87,184
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	(41)	(10)
Fair Value	$ 10,342	$ 9,428

XML

Investments and Fair Value Measurements - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended
	Apr. 30, 2022	Mar. 31, 2022	Mar. 31, 2021	Feb. 28, 2022	Dec. 31, 2021	Nov. 30, 2020
Debt Instrument [Line Items]
Impairment loss on available-for-sale debt securities		$ 0
Contingent consideration		24,000,000			$ 23,740,000
Change in fair of value of contingent consideration		260,000	$ 2,500,000
Equity investment		2,000,000		$ 2,000,000	0
Inference Solutions
Debt Instrument [Line Items]
Contingent consideration		24,000,000			23,700,000
Change in fair of value of contingent consideration		300,000
Inference Solutions | Subsequent Event
Debt Instrument [Line Items]
Payment for contingent consideration liability	$ 24,000,000
Inference Solutions | Maximum
Debt Instrument [Line Items]
Contingent consideration						$ 24,000,000
Level 2
Debt Instrument [Line Items]
Contingent consideration		0			0
Level 3
Debt Instrument [Line Items]
Contingent consideration		24,000,000			23,740,000
Nonrecurring
Debt Instrument [Line Items]
Assets measured at fair value on nonrecurring basis		0			0
Liabilities measured at fair value on nonrecurring basis		0			0
Convertible Senior Notes, Due 2023 | Level 2 | Convertible debt
Debt Instrument [Line Items]
Fair value of long-term debt		6,200,000			114,900,000
Convertible Senior Notes, Due 2025 | Level 2 | Convertible debt
Debt Instrument [Line Items]
Fair value of long-term debt		$ 812,100,000			$ 917,300,000

XML

Investments and Fair Value Measurements - Maturity Dates (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Cost
Due within one year	$ 378,990	$ 379,169
Due after one year	121,287	147,953
Cost	500,277	527,122
Fair Value
Due within one year	377,519	378,980
Due after one year	118,707	147,377
Total	$ 496,226	$ 526,357

XML

Investments and Fair Value Measurements - Schedule of Assets Carried at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets
Cash equivalents	$ 21,511	$ 32,127
Marketable investments (short and long term)	496,226	526,357
Liabilities
Contingent consideration	24,000	23,740
Level 1
Assets
Cash equivalents	21,311	31,380
Marketable investments (short and long term)	130,599	146,528
Liabilities
Contingent consideration	0	0
Level 2
Assets
Cash equivalents	200	747
Marketable investments (short and long term)	365,627	379,829
Liabilities
Contingent consideration	0	0
Level 3
Assets
Cash equivalents	0	0
Marketable investments (short and long term)	0	0
Liabilities
Contingent consideration	24,000	23,740
Certificates of deposit
Assets
Marketable investments (short and long term)	2,243	2,359
Certificates of deposit | Level 1
Assets
Marketable investments (short and long term)	0	0
Certificates of deposit | Level 2
Assets
Marketable investments (short and long term)	2,243	2,359
Certificates of deposit | Level 3
Assets
Marketable investments (short and long term)	0	0
U.S. treasury
Assets
Marketable investments (short and long term)	130,599	146,528
U.S. treasury | Level 1
Assets
Marketable investments (short and long term)	130,599	146,528
U.S. treasury | Level 2
Assets
Marketable investments (short and long term)	0	0
U.S. treasury | Level 3
Assets
Marketable investments (short and long term)	0	0
U.S. agency and government sponsored securities
Assets
Marketable investments (short and long term)	207,425	222,711
U.S. agency and government sponsored securities | Level 1
Assets
Marketable investments (short and long term)	0	0
U.S. agency and government sponsored securities | Level 2
Assets
Marketable investments (short and long term)	207,425	222,711
U.S. agency and government sponsored securities | Level 3
Assets
Marketable investments (short and long term)	0	0
Commercial paper
Assets
Marketable investments (short and long term)	42,755	47,555
Commercial paper | Level 1
Assets
Marketable investments (short and long term)	0	0
Commercial paper | Level 2
Assets
Marketable investments (short and long term)	42,755	47,555
Commercial paper | Level 3
Assets
Marketable investments (short and long term)	0	0
Municipal bonds
Assets
Marketable investments (short and long term)	102,862	93,832
Municipal bonds | Level 1
Assets
Marketable investments (short and long term)	0	0
Municipal bonds | Level 2
Assets
Marketable investments (short and long term)	102,862	93,832
Municipal bonds | Level 3
Assets
Marketable investments (short and long term)	0	0
Corporate bonds
Assets
Marketable investments (short and long term)	10,342	13,372
Corporate bonds | Level 1
Assets
Marketable investments (short and long term)	0	0
Corporate bonds | Level 2
Assets
Marketable investments (short and long term)	10,342	13,372
Corporate bonds | Level 3
Assets
Marketable investments (short and long term)	0	0
Money market funds
Assets
Cash equivalents	21,311	31,380
Money market funds | Level 1
Assets
Cash equivalents	21,311	31,380
Money market funds | Level 2
Assets
Cash equivalents	0	0
Money market funds | Level 3
Assets
Cash equivalents	0	0
U.S. agency and government sponsored securities
Assets
Cash equivalents	200
U.S. agency and government sponsored securities | Level 1
Assets
Cash equivalents	0
U.S. agency and government sponsored securities | Level 2
Assets
Cash equivalents	200
U.S. agency and government sponsored securities | Level 3
Assets
Cash equivalents	$ 0
Certificates of deposit
Assets
Cash equivalents		747
Certificates of deposit | Level 1
Assets
Cash equivalents		0
Certificates of deposit | Level 2
Assets
Cash equivalents		747
Certificates of deposit | Level 3
Assets
Cash equivalents		$ 0

XML

Investments and Fair Value Measurements - Reconciliation of Contingent Consideration (Details) - Fair Value, Recurring - Liability $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Summary of changes in contingent consideration liabilities
Balance, beginning of period	$ 23,740
Change in fair value of contingent consideration	260
Balance, end of period	$ 24,000

XML

Financial Statement Components - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 100,151	$ 90,878
Cash
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	78,640	58,751
Certificates of deposit
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	0	747
Money market funds
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	21,311	31,380
U.S. agency securities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 200	$ 0

XML

Financial Statement Components - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accounts Receivable [Line Items]
Allowance for doubtful accounts	$ (233)	$ (220)
Accounts receivable, net	77,912	83,731
Trade accounts receivable
Accounts Receivable [Line Items]
Trade accounts receivable	66,538	75,970
Unbilled trade accounts receivable, net of advance client deposits
Accounts Receivable [Line Items]
Trade accounts receivable	$ 11,607	$ 7,981

XML

Financial Statement Components - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial Statement Components [Abstract]
Prepaid expenses	$ 24,717	$ 21,306
Other current assets	5,086	6,443
Contract assets	2,731	2,593
Prepaid expenses and other current assets	$ 32,534	$ 30,342

XML

Financial Statement Components - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment	$ 192,435		$ 171,336
Accumulated depreciation and amortization	(100,959)		(93,551)
Property and equipment, net	91,476		77,785
Depreciation and amortization associated with property and equipment	7,800	$ 5,800
Computer and network equipment
Property, Plant and Equipment [Line Items]
Property and equipment	136,645		116,701
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	44,645		44,268
Internal-use software development costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,069		500
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,044		3,953
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6,032		$ 5,914

XML

Financial Statement Components - Schedule of Property and Equipment under Finance Lease Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial Statement Components [Abstract]
Gross	$ 42,541	$ 42,541
Less: accumulated depreciation and amortization	(42,022)	(41,689)
Property and equipment, net	$ 519	$ 852

XML

Financial Statement Components - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Feb. 28, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other assets	$ 4,730		$ 4,964
Equity investment	2,000	$ 2,000	0
Deferred tax assets	5,018		6,907
Total	$ 11,748		$ 11,871

XML

Financial Statement Components - Schedule of Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial Statement Components [Abstract]
Accrued expenses	$ 22,764	$ 20,108
Accrued compensation and benefits	44,647	34,729
Contingent consideration	24,000	23,740
Accrued and other current liabilities	$ 91,411	$ 78,577

XML

Financial Statement Components - Schedule of Long-term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 1,913	$ 2,097
Other long-term liabilities	4,769	5,574
Other long-term liabilities	$ 6,682	$ 7,671

XML

Goodwill and Intangible Assets - Goodwill and Intangible Asset Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Finite-lived Intangible Assets [Roll Forward]
Beginning of the period	$ 39,897
Amortization	(2,947)	$ (2,900)
End of the period	$ 36,950

XML

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Acquired Finite-Lived Intangible Assets
Gross Carrying Amount	$ 58,784		$ 58,784
Accumulated Amortization	(21,834)		(18,887)
Net Carrying Amount	$ 36,950		$ 39,897
Weighted Average Remaining Amortization period (Years)	3 years 9 months 18 days		4 years
Amortization of intangible assets	$ 2,947	$ 2,900
Developed technology
Acquired Finite-Lived Intangible Assets
Gross Carrying Amount	56,214		$ 56,214
Accumulated Amortization	(20,586)		(17,821)
Net Carrying Amount	$ 35,628		$ 38,393
Weighted Average Remaining Amortization period (Years)	3 years 9 months 18 days		4 years
Acquired workforce
Acquired Finite-Lived Intangible Assets
Gross Carrying Amount	$ 470		$ 470
Accumulated Amortization	(373)		(334)
Net Carrying Amount	$ 97		$ 136
Weighted Average Remaining Amortization period (Years)	10 months 24 days		10 months 24 days
Customer relationships
Acquired Finite-Lived Intangible Assets
Gross Carrying Amount	$ 1,600		$ 1,600
Accumulated Amortization	(501)		(421)
Net Carrying Amount	$ 1,099		$ 1,179
Weighted Average Remaining Amortization period (Years)	3 years 6 months		3 years 8 months 12 days
Trademarks
Acquired Finite-Lived Intangible Assets
Gross Carrying Amount	$ 500		$ 500
Accumulated Amortization	(374)		(311)
Net Carrying Amount	$ 126		$ 189
Weighted Average Remaining Amortization period (Years)	8 months 12 days		10 months 24 days

XML

Goodwill and Intangible Assets - Future Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining 2022	$ 8,758
2023	10,870
2024	7,527
2025	5,595
2026	4,200
Thereafter	0
Net Carrying Amount	$ 36,950	$ 39,897

XML

Debt - Convertible Senior Notes and Capped Call (Details)	1 Months Ended		2 Months Ended	3 Months Ended		12 Months Ended	33 Months Ended
	May 31, 2020 USD ($) shares	May 31, 2018 USD ($) $ / shares	Jun. 30, 2020 USD ($) $ / shares	Mar. 31, 2022 USD ($) day $ / shares Rate shares	Mar. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Mar. 31, 2022 USD ($) day trigger $ / shares shares	Dec. 31, 2021 USD ($)	May 21, 2020 $ / shares
Debt Instrument [Line Items]
Cash consideration to repurchase note				$ 31,905,000	$ 7,840,000
Common Stock
Debt Instrument [Line Items]
Equity component from partial repurchase of 2023 convertible senior notes (in shares) | shares				540,000	143,000
Treasury Stock
Debt Instrument [Line Items]
Partial unwind of capped calls related to the 2023 convertible senior notes (in shares) | shares				111,416
Convertible Senior Notes, Due 2023 | Common Stock
Debt Instrument [Line Items]
Equity component from partial repurchase of 2023 convertible senior notes (in shares) | shares				540,130
Convertible Senior Notes, Due 2023 | Treasury Stock
Debt Instrument [Line Items]
Partial unwind of capped calls related to the 2023 convertible senior notes (in shares) | shares				111,416
Convertible debt
Debt Instrument [Line Items]
Debt balance				$ 749,800,000			$ 749,800,000
Convertible debt | Convertible Senior Notes, Due 2023
Debt Instrument [Line Items]
Stated interest rate on debt (percent)		0.125%
Proceeds from issuance of debt		$ 250,800,000
Multiple of principle amount				$ 1,000			$ 1,000
Conversion ratio on convertible debt | Rate				2449.78%
Conversion price on convertible debt (in USD per share) | $ / shares				$ 40.82			$ 40.82
Effective interest rate on debt (percent)				6.39%			6.39%
Payment on debt issuance cost		8,000,000		$ 0
Debt issuance costs		$ 6,000,000		16,000			$ 16,000	$ 291,000
Convertible debt				2,300,000			2,300,000
Debt balance				$ 2,317,000			$ 2,317,000	34,225,000
Amortization of debt issuance costs, Effective interest rate | Rate				0.76%
Cap price of the capped call transactions (in dollars per share) | $ / shares		$ 62.80
Number of shares covered in the Capped Call Transactions (shares) | shares				6,300,000			6,300,000
Cost of Capped Call Transactions recorded in additional paid in capital				$ 31,400,000			$ 31,400,000
Debt instrument, repurchase amount	$ 181,000,000
Aggregate consideration to repurchase note	449,600,000
Cash consideration to repurchase note	$ 181,000,000
Number of conversion features triggered | trigger							1
Conversion price per share, requiring conversion of instrument (in USD per share) | $ / shares				$ 53.07			$ 53.07
Cash payment to settle aggregate principal				$ 31,900,000
Debt instrument, conversion multiple of aggregate principal amount				31,900,000
Conversion of aggregate principal amount, term one				$ 2,100,000
Convertible debt | Convertible Senior Notes, Due 2023 | Common Stock
Debt Instrument [Line Items]
Equity component from partial repurchase of 2023 convertible senior notes (in shares) | shares	2,723,581
Debt instrument, conversion multiple of aggregate principal amount, shares | shares				540,130
Convertible debt | Convertible Senior Notes, Due 2023 | Fundamental change event
Debt Instrument [Line Items]
Debt redemption price as percentage of principal amount				100.00%
Convertible debt | Convertible Senior Notes, Due 2023 | Convertible, term one
Debt Instrument [Line Items]
Number of trading days | day							20
Number of consecutive trading days | day							30
Threshold percentage of stock price trigger							130.00%
Convertible debt | Convertible Senior Notes, Due 2025
Debt Instrument [Line Items]
Stated interest rate on debt (percent)			0.50%
Stated additional interest rate on debt (percent)			0.00500
Proceeds from issuance of debt			$ 728,800,000
Multiple of principle amount				$ 1,000
Conversion ratio on convertible debt | Rate				744.37%
Conversion price on convertible debt (in USD per share) | $ / shares				$ 134.34			$ 134.34
Premium on conversion price in relation to closing price (percentage)									30.00%
Closing price of common stock (in dollars per share) | $ / shares				110.40			110.40		$ 103.34
Equity component						$ 158,300,000
Share price of common stock with conversion premium (in dollars per share) | $ / shares				$ 174.64			$ 174.64
Sinking fund payment				$ 0
Effective interest rate on debt (percent)				5.76%			5.76%
Payment on debt issuance cost			$ 18,700,000	$ 11,900,000
Debt issuance costs				11,936,000		14,700,000	$ 11,936,000	12,835,000
Convertible debt				735,600,000			735,600,000
Debt balance				$ 747,500,000			$ 747,500,000	$ 747,500,000
Amortization of debt issuance costs, Effective interest rate | Rate				1.00%
Cap price of the capped call transactions (in dollars per share) | $ / shares			$ 206.68
Number of shares covered in the Capped Call Transactions (shares) | shares				5,600,000			5,600,000
Reduction to additional paid-in-capital, related to 2025 Capped Call Transactions						$ 90,500,000
Convertible debt | Convertible Senior Notes, Due 2025 | Fundamental change event
Debt Instrument [Line Items]
Debt redemption price as percentage of principal amount				100.00%
Convertible debt | Convertible Senior Notes, Due 2025 | on or after June 6, 2023
Debt Instrument [Line Items]
Number of trading days | day				20
Number of consecutive trading days | day				30
Threshold percentage of stock price trigger				130.00%
Debt redemption price as percentage of principal amount				100.00%
Number of trading days preceding notice of redemption | day				2
Convertible debt | Convertible Senior Notes, Due 2025 | Convertible, term one
Debt Instrument [Line Items]
Number of trading days | day				20
Number of consecutive trading days | day				30
Threshold percentage of stock price trigger				130.00%
Convertible debt | Convertible Senior Notes, Due 2025 | Convertible, term two
Debt Instrument [Line Items]
Number of trading days | day				5
Number of consecutive trading days | day				5
Threshold percentage of stock price trigger				98.00%
Private placement | Convertible debt | Convertible Senior Notes, Due 2023
Debt Instrument [Line Items]
Aggregate principal amount of debt		$ 258,800,000	$ 747,500,000
Option to purchase additional debt through private offering			$ 97,500,000

XML

Debt - Schedule of Net Carrying Amount of the Liability Component of the Notes (Details) - Convertible debt - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 31, 2018
Debt Instrument [Line Items]
Principal	$ 749,800
Convertible Senior Notes, Due 2025
Debt Instrument [Line Items]
Principal	747,500	$ 747,500
Unamortized issuance costs	(11,936)	(12,835)	$ (14,700)
Total debt, net carrying value	735,564	734,665
Convertible Senior Notes, Due 2023
Debt Instrument [Line Items]
Principal	2,317	34,225
Unamortized issuance costs	(16)	(291)		$ (6,000)
Total debt, net carrying value	$ 2,301	$ 33,934

XML

Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Interest Expense	$ 1,870	$ 1,938
Convertible Senior Notes, Due 2025 | Convertible debt
Debt Instrument [Line Items]
Contractual interest expense	934	934
Amortization of issuance costs	899	890
Interest Expense	1,833	1,824
Convertible Senior Notes, Due 2023 | Convertible debt
Debt Instrument [Line Items]
Contractual interest expense	6	17
Amortization of issuance costs	31	84
Interest Expense	$ 37	$ 101

XML

Debt - Schedule of Maturities of Debt (Details) - Convertible debt - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total	$ 749,800
Convertible Senior Notes, Due 2025
Debt Instrument [Line Items]
2025 (Maturity date of June 1, 2025)	747,500
Total	747,500	$ 747,500
Convertible Senior Notes, Due 2023
Debt Instrument [Line Items]
2023 (Maturity date of May 1, 2023)	2,317
Total	$ 2,317	$ 34,225

XML

Stockholders' Equity - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 shares	Dec. 31, 2021 shares
Stockholders' Equity Capital Structure [Line Items]
Common stock shares authorized (shares)	450,000,000
Common stock par value (in dollars per share) | $ / shares	$ 0.001
Common stock shares issued (shares)	69,521,562		68,488,337
Common stock shares outstanding (shares)	69,521,562		68,488,337
Preferred stock shares authorized (shares)	5,000,000
Preferred stock par value (in dollars per share) | $ / shares	$ 0.001
Preferred stock shares issued (shares)	0		0
Preferred stock shares outstanding (shares)	0		0
PRSUs
Stockholders' Equity Capital Structure [Line Items]
Equity instruments granted (in shares)	59,383
Equity instruments granted, weighted average grant date fair value | $	$ 8.3
Earnout target percentage, maximum for 2022 and 2023	1
PRSUs | Minimum
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage	0
PRSUs | Maximum
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage	2
PRSUs | Maximum | Shareholder for Performance Any Period is Negative
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage	1
PRSUs | Maximum | Executive Employment Terminates due to Death by end of 2024
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage	1
PRSUs | Maximum | Executive Employment Terminates due to Disability by end of 2024
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage	0.50
Common Stock
Stockholders' Equity Capital Structure [Line Items]
Equity component from partial repurchase of 2023 convertible senior notes (in shares)	540,000	143,000
Common Stock | Convertible Senior Notes, Due 2023
Stockholders' Equity Capital Structure [Line Items]
Equity component from partial repurchase of 2023 convertible senior notes (in shares)	540,130
Treasury Stock
Stockholders' Equity Capital Structure [Line Items]
Partial unwind of capped calls related to the 2023 convertible senior notes (in shares)	111,416
Treasury Stock | Convertible Senior Notes, Due 2023
Stockholders' Equity Capital Structure [Line Items]
Partial unwind of capped calls related to the 2023 convertible senior notes (in shares)	111,416

XML

Stockholders' Equity - Common Stock Reserved for Future Issuance (Details) shares in Thousands	Mar. 31, 2022 shares
Class of Stock
Common stock reserved for future issuance (in shares)	24,501
Stock options
Class of Stock
Common stock reserved for future issuance (in shares)	1,768
RSUs (includes PRSUs)
Class of Stock
Common stock reserved for future issuance (in shares)	3,236
ESPP
Class of Stock
Common stock reserved for future issuance (in shares)	3,761
2014 Plan
Class of Stock
Common stock reserved for future issuance (in shares)	15,736

XML

Stockholders' Equity - Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares
Options Outstanding, Weighted Average Exercise Price [Roll Forward]
Closing market price of common stock (in USD per share)	$ 110.40
Stock options
Options Outstanding [Roll Forward]
Outstanding, beginning balance (in shares) | shares	1,982
Options granted (in shares) | shares	78
Options exercised (in shares) | shares	(281)
Options forfeited or expired (in shares) | shares	(11)
Outstanding, ending balance (in shares) | shares	1,768
Options Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning balance, weighted average exercise price (in USD per share)	$ 38.65
Options granted, weighted average exercise price (in USD per share)	110.39
Options exercised, weighted average exercise price (in USD per share)	4.54
Options forfeited or expired, weighted average exercise price (in USD per share)	110.05
Outstanding, ending balance, weighted average exercise price (in USD per share)	$ 46.78
Outstanding, ending balance, weighted average remaining contractual life (years)	2 years 7 months 6 days
Outstanding, ending balance, aggregate intrinsic value | $	$ 123,988
Weighted average grant date fair value, options granted (in USD per share)	$ 54.82

XML

Stockholders' Equity - RSU Activity (Details)	3 Months Ended
	Mar. 31, 2022 $ / shares shares
RSUs (includes PRSUs)
Number of Shares
Outstanding, beginning balance (in shares)	2,560,000
RSUs granted (in shares)	1,072,000
RSUs vested and released (in shares)	(323,000)
RSUs forfeited or canceled (in shares)	(73,000)
Outstanding, ending balance (in shares)	3,236,000
Weighted Average Grant Date Fair Value Per Share
Outstanding, beginning balance, weighted-average grant date fair value per share (in USD per share) | $ / shares	$ 125.65
RSUs granted, weighted average grant date fair value (in USD per share) | $ / shares	112.03
RSUs vested and released, weighted average grant date fair value (in USD per share) | $ / shares	105.70
RSUs forfeited or canceled, weighted average grant date fair value (in USD per share) | $ / shares	123.68
Outstanding, ending balance, weighted-average grant date fair value per share (in USD per share) | $ / shares	$ 123.18
PRSUs
Number of Shares
RSUs granted (in shares)	59,383

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Stockholders' Equity - Stock-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Stock-based Compensation Expense
Stock-based compensation expense	$ 39,394	$ 20,908
Stock options
Stock-based Compensation Expense
Unrecognized stock-based compensation expense	$ 22,048
Weighted-average amortization period (years)	2 years 7 months 6 days
RSU
Stock-based Compensation Expense
Unrecognized stock-based compensation expense	$ 366,400
Weighted-average amortization period (years)	2 years 9 months 18 days
PRSU
Stock-based Compensation Expense
Unrecognized stock-based compensation expense	$ 7,847
Weighted-average amortization period (years)	2 years 9 months 18 days
ESPP
Stock-based Compensation Expense
Unrecognized stock-based compensation expense	$ 861
Weighted-average amortization period (years)	1 month 6 days
Cost of revenue
Stock-based Compensation Expense
Stock-based compensation expense	$ 7,793	3,105
Research and development
Stock-based Compensation Expense
Stock-based compensation expense	10,145	4,763
Sales and marketing
Stock-based Compensation Expense
Stock-based compensation expense	13,424	6,771
General and administrative
Stock-based Compensation Expense
Stock-based compensation expense	$ 8,032	$ 6,269

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Stockholders' Equity - Valuation Assumptions (Details) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Class of Stock
Closing price of common stock as of grant date (February 28, 2022) (in USD per share)	$ 110.40
Dividend yield (percent)	0.00%	0.00%
Stock options
Class of Stock
Expected term (years)	6 years	6 years
Volatility (percent)	46.00%	47.00%
Risk-free interest rate (percent)	1.80%	1.00%
Dividend yield (percent)	0.00%	0.00%
PRSUs
Class of Stock
Closing price of common stock as of grant date (February 28, 2022) (in USD per share)	$ 110.00
Expected term (years)	2 years 10 months 2 days
Volatility (percent)	48.80%
Risk-free interest rate (percent)	1.60%
Dividend yield (percent)	0.00%

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Net Loss Per Share - Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net loss	$ (34,120)	$ (12,332)
Weighted-average shares used in computing basic loss per share (in shares)	68,974	66,721
Weighted-average shares used in computing diluted loss per share (in shares)	68,974	66,721
Basic loss per share (in USD per share)	$ (0.49)	$ (0.18)
Diluted loss per share (in usd per share)	$ (0.49)	$ (0.18)

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Net Loss Per Share - Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share
Anti-dilutive securities excluded from calculation of diluted net loss per share (shares)	11,046	11,643
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Anti-dilutive securities excluded from calculation of diluted net loss per share (shares)	1,768	2,244
RSUs (includes PRSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share
Anti-dilutive securities excluded from calculation of diluted net loss per share (shares)	3,236	2,515
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Anti-dilutive securities excluded from calculation of diluted net loss per share (shares)	6,042	6,884

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Provision for (benefit from) income taxes	$ 2,256	$ (517)

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Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Hosting and telecommunications agreement
Other Commitments [Line Items]
Total commitments under agreements	$ 19.5
Purchase Commitment - Cloud Services Agreement
Other Commitments [Line Items]
Expiring commercial commitment balance	55.4
Commercial commitment to be paid remainder of 2022	12.6
Commercial commitment to be paid in year 2023	$ 42.8
Maximum | Hosting and telecommunications agreement
Other Commitments [Line Items]
Period for various agreements (in months)	60 months
Convertible debt
Other Commitments [Line Items]
Debt balance	$ 749.8

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Geographical Information - Schedule of Revenue and Property and Equipment by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets
Revenue	$ 182,777	$ 137,882
Property and equipment, net	91,476		$ 77,785
United States
Revenues from External Customers and Long-Lived Assets
Revenue	167,247	125,886
Property and equipment, net	82,645		68,674
International
Revenues from External Customers and Long-Lived Assets
Revenue	15,530	$ 11,996
Property and equipment, net	$ 8,831		$ 9,111

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Leases - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease termination notice, period (in days)	30 days
Data Center
Lessee, Lease, Description [Line Items]
Amount of lease obligation, not yet commenced	$ 0.3
Operating lease not yet commenced, term of lease (in years)	3 years
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract (in years)	1 year
Operating lease, extension term (in years)	3 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract (in years)	10 years
Operating lease, extension term (in years)	5 years

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Leases - Lease Cost and Supplemental Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Operating lease cost	$ 2,900	$ 2,668
Finance lease cost:
Amortization of right-of-use assets	333	717
Interest on finance lease liabilities	0	13
Total finance lease cost	333	730
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash used in operating leases	(2,709)	(2,038)
Financing cash used in finance leases	0	(456)
Right-of-use assets obtained in exchange for operating leases	236	38,339
Right of use assets obtained in exchange for finance leases	$ 0	$ 0

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Leases - Balance Sheet Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Operating leases
Operating lease right-of-use assets	$ 46,536	$ 48,703
Operating lease liabilities	10,135	9,826
Operating lease liabilities — less current portion	44,818	47,088
Total operating lease liabilities	54,953	56,914
Finance leases
Property and equipment, gross	42,541	42,541
Less: accumulated depreciation and amortization	(42,022)	(41,689)
Property and equipment, net	$ 519	$ 852
Finance Lease, Right-of-Use Asset, Balance Sheet Location [Extensible List]	Property and equipment, net	Property and equipment, net

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Leases - Weighted Average Remaining Terms and Discount Rates (Details)	Mar. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Weighted average remaining lease term, Operating leases (in years)	7 years 1 month 6 days	7 years 3 months 18 days
Weighted average discount rate, Operating leases (percent)	3.20%	3.20%

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Leases - Lease Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Operating Leases
Remaining 2022	$ 8,744
2023	10,739
2024	7,870
2025	5,613
2026	5,773
Thereafter	22,875
Total future minimum lease payments	61,614
Less: imputed interest	(6,661)
Total	$ 54,953	$ 56,914

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