Coursera (COUR) 10-Q 10 Nov 21 2021 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2021	Oct. 31, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Entity File Number	001-40275
Entity Registrant Name	COURSERA, INC.
Entity Tax Identification Number	45-3560292
Entity Address, Address Line One	381 E. Evelyn Ave.
Entity Address, City or Town	Mountain View
Entity Incorporation State Country Code	DE
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94041
City Area Code	650
Local Phone Number	963-9884
Title of 12(b) Security	Common Stock, $0.00001 par value
Trading Symbol	COUR
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		140,589,748
Entity Central Index Key	0001651562
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 801,074	$ 79,878
Marketable securities	15,030	205,402
Accounts receivable, net of allowance for doubtful accounts of $48 and $195 as of December 31, 2020 and September 30, 2021, respectively	35,964	40,721
Deferred costs	19,166	14,077
Prepaid expenses and other current assets	17,455	14,993
Total current assets	888,689	355,071
Property, equipment and software, net	24,521	18,644
Operating lease right-of-use assets	17,569	21,622
Intangible assets, net	10,299	10,570
Restricted cash	2,548	2,548
Other assets	11,223	9,169
Total assets	954,849	417,624
Current liabilities:
Educator partners payable	44,333	39,005
Other accounts payable	11,749	12,897
Accrued compensation and benefits	18,641	12,997
Operating lease liabilities, current	7,959	7,926
Deferred revenue, current	91,369	76,080
Other current liabilities	7,397	4,739
Total current liabilities	181,448	153,644
Operating lease liabilities, non-current	13,472	18,305
Other liabilities	573	644
Deferred revenue, non-current	3,378	4,562
Total liabilities	198,871	177,155
Commitments and contingencies (Note 12)
Redeemable convertible preferred stock:
$0.00001 par value- 76,420,805 and zero shares authorized as of December 31, 2020 and September 30, 2021, respectively; 75,305,400 and zero shares issued and outstanding as of December 31, 2020 and September 30, 2021, respectively; and aggregate liquidation preference, $464,036 and zero as of December 31, 2020 and September 30, 2021, respectively	0	462,293
Stockholders' equity (deficit):
Preferred stock, $0.00001 par value- zero and 10,000,000 shares authorized as of December 31, 2020 and September 30, 2021, respectively; zero shares issued and outstanding as of December 31, 2020 and September 30, 2021
Common stock, $0.00001 par value-162,000,000 and 300,000,000 shares authorized as of December 31, 2020 and September 30, 2021, respectively; 40,301,290 and 140,333,046 shares issued and outstanding as of December 31, 2020 and September 30, 2021, respectively	1	0
Additional paid-in capital	1,201,705	126,408
Treasury stock-at cost 2,747,938 shares as of December 31, 2020 and September 30, 2021	(4,701)	(4,701)
Accumulated other comprehensive income	1	20
Accumulated deficit	(441,028)	(343,551)
Total stockholders' equity (deficit)	755,978	(221,824)
Total liabilities, redeemable convertible preferred stock, and stockholders' equity (deficit)	$ 954,849	$ 417,624

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 195	$ 48
Temporary equity, par value (in dollars per share)	$ 0.00001	$ 0.00001
Temporary equity, shares authorized (in shares)	0	76,420,805
Temporary equity, shares issued (in shares)	0	75,305,400
Temporary equity, shares outstanding (in shares)	0	75,305,400
Temporary equity, liquidation preference	$ 0	$ 464,036
Preferred stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Preferred stock, shares authorized (in shares)	10,000,000	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	300,000,000	162,000,000
Common stock, shares issued (in shares)	140,333,046	40,301,290
Common stock, shares outstanding (in shares)	140,333,046	40,301,290
Treasury stock, shares	2,747,938	2,747,938

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 109,880	$ 82,674	$ 300,331	$ 210,249
Cost of revenue	42,162	38,970	122,149	99,082
Gross profit	67,718	43,704	178,182	111,167
Operating expenses:
Research and development	33,935	19,620	97,079	53,449
Sales and marketing	45,268	26,162	121,743	72,272
General and administrative	19,942	9,810	54,933	25,839
Total operating expenses	99,145	55,592	273,755	151,560
Loss from operations	(31,427)	(11,888)	(95,573)	(40,393)
Interest income	62	119	227	1,080
Interest expense				(12)
Other expense, net	(286)	227	(251)	9
Loss before income taxes	(31,651)	(11,542)	(95,597)	(39,316)
Income tax expense	800	325	1,880	781
Net loss	$ (32,451)	$ (11,867)	$ (97,477)	$ (40,097)
Net loss per share attributable to common stockholders—basic and diluted (in dollars per share)	$ (0.23)	$ (0.31)	$ (0.93)	$ (1.10)
Weighted average shares used in computing net loss per share attributable to common stockholders—basic and diluted (in shares)	138,846,394	37,828,682	104,316,176	36,564,569

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (32,451)	$ (11,867)	$ (97,477)	$ (40,097)
Change in unrealized gain (loss) on marketable securities, net of tax	(4)	11	(19)	(57)
Comprehensive loss	$ (32,455)	$ (11,856)	$ (97,496)	$ (40,154)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2019		$ 332,681
Beginning balance (in shares) at Dec. 31, 2019		67,658,342
Beginning balance at Dec. 31, 2019	$ (186,999)			$ 94,364	$ (4,701)	$ 74	$ (276,736)
Beginning balance (in shares) at Dec. 31, 2019			35,682,740
Issuance of preferred stock, net of issuance costs		$ 129,611
Issuance of preferred stock, net of issuance costs (in shares)		7,647,058
Issuance of common stock upon exercise of options	6,849			6,849
Issuance of common stock upon exercise of options (in shares)			2,865,308
Issuance of common stock upon exercise of unvested options (in shares)			50,000
Issuance of restricted stock awards (in shares)			30,000
Issuance of common stock upon exercise of warrants	38			38
Issuance of common stock upon exercise of warrants (in shares)			190,930
Vesting of early exercise stock options	176			176
Stock-based compensation expense	11,842			11,842
Change in unrealized loss on marketable securities	(57)					(57)
Net loss	(40,097)						(40,097)
Ending balance at Sep. 30, 2020		$ 462,292
Ending balance (in shares) at Sep. 30, 2020		75,305,400
Ending balance at Sep. 30, 2020	(208,248)			113,269	(4,701)	17	(316,833)
Ending balance (in shares) at Sep. 30, 2020			38,818,978
Beginning balance at Jun. 30, 2020		$ 332,681
Beginning balance (in shares) at Jun. 30, 2020		67,658,342
Beginning balance at Jun. 30, 2020	(206,192)			103,469	(4,701)	6	(304,966)
Beginning balance (in shares) at Jun. 30, 2020			36,785,718
Issuance of preferred stock, net of issuance costs		$ 129,611
Issuance of preferred stock, net of issuance costs (in shares)		7,647,058
Issuance of common stock upon exercise of options	4,814			4,814
Issuance of common stock upon exercise of options (in shares)			1,983,260
Issuance of common stock upon exercise of unvested options (in shares)			50,000
Vesting of early exercise stock options	40			40
Stock-based compensation expense	4,946			4,946
Change in unrealized loss on marketable securities	11					11
Net loss	(11,867)						(11,867)
Ending balance at Sep. 30, 2020		$ 462,292
Ending balance (in shares) at Sep. 30, 2020		75,305,400
Ending balance at Sep. 30, 2020	(208,248)			113,269	(4,701)	17	(316,833)
Ending balance (in shares) at Sep. 30, 2020			38,818,978
Beginning balance at Dec. 31, 2020	$ 462,293	$ 462,293
Beginning balance (in shares) at Dec. 31, 2020	75,305,400	75,305,400
Beginning balance at Dec. 31, 2020	$ (221,824)			126,408	(4,701)	20	(343,551)
Beginning balance (in shares) at Dec. 31, 2020	40,301,290		40,301,290
Conversion of redeemable convertible preferred stock to common stock upon initial public offering		$ 462,293
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)		75,305,400
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	$ 462,293		$ 1	462,292
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)			75,305,400
Issuance of common stock upon initial public offering, net of offering costs (in shares)			17,024,276
Issuance of common stock upon initial public offering, net of offering costs	518,835			518,835
Issuance of common stock upon exercise of options	26,872			26,872
Issuance of common stock upon exercise of options (in shares)			7,519,696
Vesting of restricted stock units (in shares)			295,650
Tax withholding on vesting of restricted stock units	4,445			(4,445)
Tax withholding on vesting of restricted stock units (in shares)			(115,381)
Issuance of restricted stock awards (in shares)			2,115
Vesting of early exercise stock options	63			63
Stock-based compensation expense	71,680			71,680
Change in unrealized loss on marketable securities	(19)					(19)
Net loss	(97,477)						(97,477)
Ending balance at Sep. 30, 2021	$ 0
Ending balance (in shares) at Sep. 30, 2021	0	0
Ending balance at Sep. 30, 2021	$ 755,978		$ 1	1,201,705	(4,701)	1	(441,028)
Ending balance (in shares) at Sep. 30, 2021	140,333,046		140,333,046
Beginning balance at Jun. 30, 2021	$ 755,409		$ 1	1,168,681	(4,701)	5	(408,577)
Beginning balance (in shares) at Jun. 30, 2021			137,136,911
Issuance of common stock upon exercise of options	12,588			12,588
Issuance of common stock upon exercise of options (in shares)			3,015,866
Vesting of restricted stock units (in shares)			295,650
Tax withholding on vesting of restricted stock units	4,445			(4,445)
Tax withholding on vesting of restricted stock units (in shares)			(115,381)
Vesting of early exercise stock options	21			21
Stock-based compensation expense	24,860			24,860
Change in unrealized loss on marketable securities	(4)					(4)
Net loss	(32,451)						(32,451)
Ending balance at Sep. 30, 2021	$ 0
Ending balance (in shares) at Sep. 30, 2021	0	0
Ending balance at Sep. 30, 2021	$ 755,978		$ 1	$ 1,201,705	$ (4,701)	$ 1	$ (441,028)
Ending balance (in shares) at Sep. 30, 2021	140,333,046		140,333,046

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (97,477)	$ (40,097)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	10,508	6,873
Stock-based compensation	67,867	11,277
Amortization or accretion of marketable securities	373	(136)
Other	257	25
Changes in operating assets and liabilities:
Accounts receivable, net	4,500	(4,655)
Prepaid expenses and other assets	(5,658)	(10,207)
Operating lease right-of-use assets	4,052	3,846
Educator partners and other accounts payable	(58)	15,732
Accrued and other liabilities	7,274	88
Operating lease liabilities	(4,801)	(4,303)
Deferred revenue	14,104	24,099
Net cash provided by operating activities	941	2,542
Cash flows from investing activities:
Purchases of marketable securities	0	(203,294)
Proceeds from maturities of marketable securities	189,981	119,934
Purchases of property, equipment, and software	(1,228)	(2,234)
Capitalized internal-use software costs	(9,712)	(6,035)
Net cash (used in) provided by investing activities	178,272	(91,629)
Cash flows from financing activities:
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs	0	129,611
Proceeds from exercise of stock options and warrants	26,810	6,887
Proceeds from exercise of unvested options, net of repurchases	0	84
Proceeds from initial public offering, net of offering cost	525,284	0
Payment of deferred offering costs	(6,119)	0
Payment of tax withholding on vesting of restricted stock units	(3,992)	0
Net cash provided by financing activities	541,983	136,582
Net increase in cash, cash equivalents, and restricted cash	721,196	47,495
Cash, cash equivalents, and restricted cash—Beginning of period	82,426	59,845
Cash, cash equivalents, and restricted cash—End of period	803,622	107,340
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	801,074	103,536
Restricted cash	2,548	3,035
Restricted cash in prepaid expenses and other current assets	0	769
Total cash, cash equivalents, and restricted cash	803,622	107,340
Supplemental disclosures of cash flow information:
Cash paid for interest	0	550
Cash paid for income taxes	1,456	666
Supplemental disclosures of noncash investing and financing activities:
Vesting of early exercised stock options	63	176
Stock-based compensation capitalized as internal-use software costs	3,813	565
Accrued tax withholding on vesting of restricted stock units	453	0
Unpaid purchases of content assets	567	0
Unpaid deferred offering costs	330	0
Content Asset
Cash flows from investing activities:
Purchases of content assets	$ (769)	$ 0

Organization and Description of

Organization and Description of Business	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Description of Business	1. ORGANIZATION AND DESCRIPTION OF BUSINESS Description of Business Coursera, Inc., a Delaware corporation (the “Company”), is an online learning platform that connects learners, educators, and institutions with the goal of providing world-class educational content that is affordable, accessible, and relevant. The Company combines content, data, and technology into a platform that is customizable and extensible to both individual learners and institutions. The Company partners with leading university and industry partners (“educator partners”) to bring quality higher education to a broad range of individuals, businesses, organizations, and governments. The Company also sells directly to institutions, including employers, colleges and universities, and governments, to enable their employees, students, and citizens to gain critical skills aligned to the job markets of today and tomorrow. The Company’s corporate headquarters are located in Mountain View, California. Initial Public Offering On April 5, 2021, the Company completed its initial public offering ("IPO") of common stock, in which it sold 14,664,776 shares. The shares were sold at a price to the public of $ 33.00 per share for net proceeds of $ 452,482 , after deducting underwriting discounts and commissions of $ 31,456 . Upon completion of the IPO, $ 6,449 of deferred offering costs were reclassified into additional paid-in capital as a reduction of the net proceeds received from the IPO. Upon the closing of the IPO, all outstanding shares of redeemable convertible preferred stock automatically converted into 75,305,400 shares of common stock on a one -for-one basis. On April 19, 2021, the underwriters exercised in full the right to purchase 2,359,500 additional shares of common stock from the Company, resulting in additional net proceeds of $ 72,802 after deducting underwriting discounts and commissions of $ 5,061 .

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	2. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation —The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), and following the requirements of the Securities and Exchange Commission (“SEC”), for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by GAAP can be condensed or omitted. These unaudited condensed consolidated financial statements have been prepared on the same basis as the Company's annual consolidated financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments, that are necessary for a fair statement of the Company's financial information. The results of operations for the three and nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021 or for any other interim period or for any other future year. The balance sheet as of December 31, 2020 has been derived from audited consolidated financial statements at that date but does not include all information required by GAAP for annual consolidated financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements contained in the Company's final prospectus filed pursuant to Rule 424(b) under the Securities Act of 1933, as amended, with the SEC on March 31, 2021 (the “Prospectus”). Principles of Consolidation —The unaudited condensed consolidated financial statements include the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Segment Information —The Company defines its segments as those operations the chief operating decision maker (“CODM”), determined to be the Chief Executive Officer of the Company, regularly reviews to allocate resources and assess performance. For the three and nine months ended September 30, 2020 and 2021 , the Company operated under three segments: Consumer, Enterprise, and Degrees. The Company continually monitors and reviews its segment reporting structure in accordance with Accounting Standards Codification (“ASC”) Topic 280, Segment Reporting , to determine whether any changes have occurred that would impact its reportable segments. For further information on the Company’s segment reporting, see Note 15 “Segment and Geographic Information.” Use of Estimates —The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities and related disclosures at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. On an ongoing basis, the Company evaluates its estimates, including those related to fair value of common stock and stock-based awards; period of benefit for capitalized commissions; internal-use software costs; useful lives of long-lived assets; the carrying value of operating lease right-of-use assets; valuation of intangible assets and income tax expense, including the valuation of deferred tax assets and liabilities, among others. The World Health Organization declared in March 2020 that the outbreak of the coronavirus disease (“COVID-19") constitutes a pandemic. The COVID-19 pandemic has caused general business disruption worldwide beginning in January 2020. The global impact of COVID-19 continues to rapidly evolve, and the Company will continue to monitor the situation and the effects on its business and operations closely. The Company does not yet know the full extent of potential impacts on its business or operations or on the global economy as a whole, particularly if the COVID-19 pandemic continues and persists for an extended period of time. Given the uncertainty, the Company cannot reasonably estimate the impact on its future results of operations, cash flows, or financial condition. As of the date of issuance of the condensed consolidated financial statements, the Company is not aware of any specific event or circumstance that would require it to update its estimates, judgments, or the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained and are recognized in the condensed consolidated financial statements as soon as they become known. Actual results could differ from those estimates, and any such differences may be material to the Company’s condensed consolidated financial statements. Summary of Significant Accounting Policies There have been no significant changes to the Company's significant accounting policies as of and for the three and nine months ended September 30, 2021 as compared to the significant accounting policies described in the Prospectus. Concentration of Credit Risk —Financial instruments that potentially subject the Company to concentration of credit risk consist of cash, cash equivalents, and marketable securities. The Company invests only in high-credit-quality instruments and maintains its cash equivalents and marketable securities in fixed-income securities. The Company places its cash primarily with domestic financial institutions that are federally insured within statutory limits. For purposes of assessing concentration of credit risk and significant customers, a group of customers under common control or customers that are affiliates of each other are regarded as a single customer. For the three and nine months ended September 30, 2020 and 2021 , the Company did not have any customers that accounted for more than 10 % of the Company’s revenue. As of December 31, 2020 and September 30, 2021, the Company had one customer that accounted for 21 % and 17 % of its net accounts receivable balance, respectively. New Accounting Pronouncements Recently Adopted The Company is an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until those standards apply to private companies. The Company has elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that it (i) is no longer an emerging growth company or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, the condensed consolidated financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public company effective dates. The JOBS Act does not preclude an emerging growth company from early adopting new or revised accounting standards. The Company early adopted ASU 2016-02, Leases (ASC 842), effective January 1, 2020, and ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, effective July 1, 2021. The Company expects to use the extended transition period for any other new or revised accounting standards during the period for which the Company remains an emerging growth company. In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract . This update requires capitalization of the implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. Further, the standard also requires the Company to amortize the capitalized implementation costs of a hosting arrangement over the term of the hosting arrangement. This update is effective for the Company for the annual reporting period commencing January 1, 2021 and interim periods within the annual reporting period commencing January 1, 2022, and early adoption is permitted. The Company early adopted ASU 2018-15 on July 1, 2021 on a prospective basis for implementation costs incurred after January 1, 2021. The adoption of the standard did not have a material impact on the condensed financial statements. New Accounting Pronouncements Not Yet Adopted In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes . This standard simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in Topic 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period, and the recognition of deferred tax liabilities for outside basis differences. The guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill and the allocation of consolidated income taxes to separate financial statements of entities not subject to income tax. ASU 2019-12 will be effective for the Company in 2022. Upon adoption, the Company must apply certain aspects of this standard retrospectively for all periods presented while other aspects are applied on a modified retrospective basis through a cumulative-effect adjustment to accumulated deficit as of the beginning of the fiscal year of adoption. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses , which provides new authoritative guidance with respect to the measurement of credit losses on financial instruments. This update changes the impairment model for most financial assets and certain other instruments by introducing a current expected credit loss (“CECL”) model. The CECL model is a more forward-looking approach based on expected losses rather than incurred losses, requiring entities to estimate and record losses expected over the remaining contractual life of an asset. The guidance will be effective for the Company in 2023 and early adoption beginning in 2019 is permitted. The Company is currently evaluating the impact from the adoption of this guidance on the consolidated financial statements and related disclosures.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2021
Revenue Recognition [Abstract]
Revenue Recognition	3. REVENUE RECOGNITION Contract Balances — The Company’s contract assets and liabilities as of January 1, 2020, December 31, 2020 and September 30, 2021 were as follows: January 1, December 31, September 30, Contract assets: Accounts receivable $ 16,592 $ 39,976 $ 30,917 Unbilled revenue 64 745 5,047 Total contract assets $ 16,656 $ 40,721 $ 35,964 Contract liabilities: Deferred revenue $ 41,607 $ 80,642 $ 94,747 Total contract liabilities $ 41,607 $ 80,642 $ 94,747 Revenue recognized during the nine months ended September 30, 2020 and 2021 that was included in the deferred revenue balances at the beginning of the year was $ 34,535 and $ 67,976 respectively. There were no impairment losses recorded on contract assets during the three and nine months ended September 30, 2020 and 2021. Remaining Performance Obligations —Remaining performance obligations are future revenue that are under noncancelable contracts but have not yet been recognized. As of September 30, 2021 , the Company had remaining performance obligations of $ 240,631 and expects to recognize approximately 64 % as revenue over the next twelve months and the remainder thereafter. Costs to Obtain and Fulfill a Contract —During the three months ended September 30, 2020 and 2021 , the Company capitalized $ 3,170 and $ 3,786 , respectively, of commissions and related payroll tax expenditures and amortized $ 1,114 and $ 2,169 , respectively, to sales and marketing expense. During the nine months ended September 30, 2020 and 2021 , the Company capitalized $ 7,003 and $ 9,485 respectively, of commissions and related payroll tax expenditures and amortized $ 2,697 and $ 5,719 , respectively, to sales and marketing expense. As of December 31, 2020 and September 30, 2021 , the amount of deferred commissions and related payroll tax expenditures included in deferred costs and in other assets was $ 5,990 and $ 6,568 , and $ 8,524 and $ 7,800 , respectively.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	4. FAIR VALUE MEASUREMENTS — The Company’s assets and liabilities that were measured at fair value by level within the fair value hierarchy as of December 31, 2020 and September 30, 2021, were as follows: As of December 31, 2020 Fair Value Level 1 Level 2 Financial assets: Cash equivalents—money market funds $ 58,997 $ 58,997 $ — Marketable securities: Corporate debt securities 8,551 — 8,551 Commercial paper 26,469 — 26,469 U.S. government Treasury bills 170,382 170,382 — Total financial assets $ 264,399 $ 229,379 $ 35,020 As of September 30, 2021 Fair Value Level 1 Financial assets: Cash equivalents—money market funds $ 760,245 $ 760,245 Marketable securities: U.S. government Treasury bills 15,030 15,030 Total financial assets $ 775,275 $ 775,275 The Company remeasures certain assets, including intangible assets and its equity-method investment in a private company, at fair value on a nonrecurring basis when there are identifiable events or changes in circumstances that may have a significant adverse impact on the fair value of these assets. No such events or changes occurred during the three and nine months ended September 30, 2020 and 2021 .

Marketable Securities

Marketable Securities	9 Months Ended
	Sep. 30, 2021
Investments Debt And Equity Securities [Abstract]
Marketable Securities	5. MARKETABLE SECURITIES The following table presents the Company’s available-for-sale marketable securities as of December 31, 2020 and September 30, 2021: As of December 31, 2020 Amortized Gross Gross Estimated Corporate debt $ 8,547 $ 4 $ — $ 8,551 Commercial paper 26,469 — — 26,469 U.S. government Treasury bills 170,366 17 ( 1 ) 170,382 Total marketable securities $ 205,382 $ 21 $ ( 1 ) $ 205,402 As of September 30, 2021 Amortized Gross Gross Estimated U.S. government Treasury bills $ 15,029 $ 1 $ — $ 15,030 Total marketable securities $ 15,029 $ 1 $ — $ 15,030 The gross realized gains and losses related to the Company’s marketable securities were not material for the three and nine months ended September 30, 2020 and 2021. The following table presents the cost basis and fair value of available-for-sale marketable securities by contractual maturity date as of December 31, 2020 and September 30, 2021: December 31, 2020 September 30, 2021 Amortized Estimated Amortized Estimated Due in one year or less $ 205,382 $ 205,402 $ 15,029 $ 15,030 Investments in an unrealized loss position consisted of the following as of December 31, 2020 and September 30, 2021: December 31, 2020 September 30, 2021 Fair Gross Fair Gross U.S. government Treasury bills $ 20,201 $ ( 1 ) $ — $ — Total investments in an unrealized loss position $ 20,201 $ ( 1 ) $ — $ — As of December 31, 2020 and September 30, 2021 , no investments were in a continuous unrealized loss position for more than 12 months. The Company does not intend to sell any of these investments and it is not more likely than not that the Company would be required to sell these investments before recovery of their amortized cost basis, which may be at maturity.

Consolidated Balance Sheet Comp

Consolidated Balance Sheet Components	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Consolidated Balance Sheet Components	6. CONSOLIDATED BALANCE SHEET COMPONENTS Property, Equipment and Software— Property, equipment and software as of December 31, 2020 and September 30, 2021, consisted of the following: Estimated December 31, 2020 September 30, 2021 Internal-use software 2 years $ 21,582 $ 34,572 Computer equipment and software 2 years 2,928 4,041 Leasehold improvements Shorter of useful life or 7,057 7,119 Furniture and fixtures 5 years 2,973 3,051 Total property, equipment and software 34,540 48,783 Less accumulated depreciation and amortization ( 15,896 ) ( 24,262 ) Property, equipment and software—net $ 18,644 $ 24,521 Depreciation and amortization expense related to property, equipment and software for the three months ended September 30, 2020 and 2021 was $ 2,139 and $ 3,533 respectively, which included amortization expense of internal-use software of $ 1,554 and $ 2,795 respectively, that is recorded within cost of revenue in the condensed consolidated statements of operations. Depreciation and amortization expense related to property, equipment and software for the nine months ended September 30, 2020 and 2021 was $ 5,772 and $ 8,901 respectively, which included amortization expense of internal-use software of $ 4,179 and $ 6,783 respectively, that is recorded within cost of revenue in the condensed consolidated statements of operations. Intangible Assets, net — Intangible assets, net as of December 31, 2020 and September 30, 2021 consisted of the following: December 31, 2020 September 30, 2021 Estimated Gross Accumulated Net Gross Accumulated Net Assembled workforce 3 years $ 181 $ ( 83 ) $ 98 $ 181 $ ( 128 ) $ 53 Developed technology 6 years 8,446 ( 1,930 ) 6,516 8,446 ( 2,982 ) 5,464 Content assets 5 years 3,956 — 3,956 5,292 ( 510 ) 4,782 Intangible assets $ 12,583 $ ( 2,013 ) $ 10,570 $ 13,919 $ ( 3,620 ) $ 10,299 During the three and nine months ended September 30, 2021 , the Company capitalized $ 567 and $ 1,336 of content assets, respectively. Intangible assets amortization expense was $ 370 and $ 604 for the three months ended September 30, 2020 and 2021 , respectively. Intangible assets amortization expense was $ 1,101 and $ 1,607 for the nine months ended September 30, 2020 and 2021, respectively. As of September 30, 2021 , the weighted-average remaining amortization period was 0.9 years for assembled workforce, 3.9 years for developed technology and 4.5 years for content assets. Amortization of assembled workforce is included in research and development expenses and amortization of developed technology and content assets is included in cost of revenue in the condensed consolidated statements of operations. As of September 30, 2021, future expected amortization expense for intangible assets was as follows: Years Ending December 31 Remainder of 2021 $ 636 2022 2,503 2023 2,465 2024 2,471 2025 1,945 2026 279 Total $ 10,299

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	7. INCOME TAXES The provision or benefit from income taxes for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter, the Company updates the estimate of the annual effective tax rate, and if the estimated tax rate changes, the Company records a cumulative adjustment. The income tax expense for the three months ended September 30, 2020 and 2021 resulted in an effective tax rate of ( 2.82 )% and ( 2.53 )%, respectively. The income tax expense for the nine months ended September 30, 2020 and 2021 resulted in an effective tax rate of ( 1.99 )% and ( 1.97 )%, respectively. The difference between the effective tax rate and the U.S. federal statutory rate is primarily due to a valuation allowance established on the Company's federal and state net deferred tax assets, foreign operations and excess tax benefits related to stock-based compensation. Due to tax losses and offsetting valuation allowance, the Company did no t record a provision for U.S. income taxes in any period. As of September 30, 2021, the Company has provided a valuation allowance against certain federal and state deferred tax assets. Management continues to evaluate the realizability of deferred tax assets and the related valuation allowance. If management's assessment of the deferred tax assets or the corresponding valuation allowance were to change, the Company would record the related adjustment to income during the period in which management makes the determination.

Redeemable Convertible Preferre

Redeemable Convertible Preferred Stock	9 Months Ended
	Sep. 30, 2021
Temporary Equity Disclosure [Abstract]
Redeemable Convertible Preferred Stock	8. REDEEMABLE CONVERTIBLE PREFERRED STOCK Redeemable Convertible Preferred Stock — Upon the closing of the Company’s IPO, all outstanding shares of its redeemable convertible preferred stock automatically converted into 75,305,400 shares of Common Stock on a one-for-one basis. As of September 30, 2021 , there were no shares of redeemable convertible preferred stock issued and outstanding.

Stockholders' Equity (Deficit)

Stockholders' Equity (Deficit)	9 Months Ended
	Sep. 30, 2021
Stockholders Equity Note [Abstract]
Stockholders' Equity (Deficit)	9. STOCKHOLDERS’ EQUITY (DEFICIT) Preferred Stock — In connection with the IPO, t he Company authorized the issuance of 10,000,000 shares of undesignated preferred stock with a par value of $ 0.00001 per share, with rights and preferences, including voting rights, to be designated from time to time by the board of directors. As of September 30, 2021, there were no shares of preferred stock issued or outstanding. Stock Incentive Plans —In 2013, the Company adopted the Coursera, Inc. Stock Incentive Plan (“Stock Incentive Plan”) and in 2014, adopted the Coursera, Inc. 2014 Executive Stock Incentive Plan (together, the “Predecessor Plans”), pursuant to which the Company has granted a combination of incentive and nonstatutory stock options and restricted stock units (“RSU”s). The Predecessor Plans were terminated in March 2021 in connection with the IPO but continue to govern the terms and conditions of the outstanding awards granted pursuant to the Predecessor Plans. No further equity awards will be granted under the Predecessor Plans. The Company adopted the 2021 Stock Incentive Plan (the "2021 Plan") and 2021 Employee Stock Purchase Plan (the "ESPP") in February 2021, which became effective on March 30, 2021 when the registration statement for the IPO was declared effective (collectively the 2021 Plan, the ESPP and the Predecessor Plans are referred to as the "Plans"). The 2021 Plan provides for the granting of incentive and nonstatutory stock options, RSUs and other equity awards. Pursuant to the ESPP, participants may contribute up to 15 percent of their eligible compensation to purchase shares of common stock at 85 percent of the lower of the market price of the Company's common stock on the date of commencement of the applicable offering period or on the last day of each six-month purchase period. The offering periods start on the first trading day on or after May 11 and November 11 of each year, except for the first offering period, which commenced on the Company’s IPO effective date, or March 30, 2021, and ends on May 10, 2023. As of September 30, 2021 , 15,351,629 shares of the Company's common stock, plus certain automatic annual increases in the number of shares of the Company's common stock reserved for future issuance under the 2021 Plan, and any shares subject to outstanding awards under the Predecessor Plans after the effective date of the 2021 Plan that are subsequently (i) forfeited or terminated, (ii) not issued because such award is settled in cash, or (iii) withheld or reacquired to satisfy the applicable exercise, strike, or purchase price, or a tax withholding obligation, were reserved for future issuance under the 2021 Plan. As of September 30, 2021 , 2,800,000 shares of the Company's common stock, plus certain automatic annual increases in the number of shares of the Company's common stock, were reserved for issuance under the ESPP. Stock Options —The Company may grant options at prices not less than the fair market value at the date of grant. These options generally expire 10 years from the date of grant. Incentive stock options and nonstatutory options generally vest ratably over a four-year service period. Stock option activity under the Plans for the nine months ended September 30, 2021 was as follows: Number of Weighted- Weighted- Aggregate Balance—December 31, 2020 32,458,408 $ 4.60 7.75 $ 625,058 Granted — — Exercised ( 7,519,696 ) 3.57 Canceled ( 1,053,024 ) 5.57 Balance—September 30, 2021 23,885,688 $ 4.88 7.06 $ 639,320 Options vested 13,752,358 $ 3.37 6.23 $ 388,899 Aggregate intrinsic value represents the difference between the exercise price of the options and the estimated fair value of the Company’s common stock as determined by the Board of Directors. The aggregate intrinsic value of options exercised was $ 264,326 for the nine months ended September 30, 2021. RSUs —During the year ended December 31, 2020, the Company began granting RSUs to its employees and directors. RSUs granted prior to the IPO had service-based and performance-based vesting conditions, both of which must be satisfied in order for RSUs to vest. The service-based vesting condition for these awards is typically satisfied over four years with a cliff vesting period of one year and continued vesting quarterly thereafter. The performance-based vesting condition is satisfied on the earlier of (i) a change in control event or (ii) the first sale of the Company’s common stock pursuant to an initial public offering. Both events were not deemed probable until consummated. Upon the first sale of the Company’s common stock pursuant to its IPO on April 5, 2021, the performance-based vesting condition was satisfied, and therefore, the Company recognized cumulative stock-based compensation expense of $ 16,803 using the accelerated attribution method for the portion of the awards for which the service-based vesting condition had been satisfied. RSUs granted after the IPO do not contain the performance-based vesting condition described above, and the related stock-based compensation expense is recognized on a straight-line basis over the requisite service period. RSU activity during the nine months ended September 30, 2021 was as follows: Number of Weighted- Aggregate Unvested balance—December 31, 2020 3,276,600 $ 17.92 $ 19,454 Granted 4,200,228 36.20 Released ( 295,650 ) 12.86 Forfeited ( 349,700 ) 28.65 Unvested balance—September 30, 2021 6,831,478 $ 28.83 $ 216,149 Stock-Based Compensation Expense —The Company records stock-based compensation expense based on the fair value as determined on the grant date. The Company estimates the fair value of stock options and shares of common stock to be issued under the ESPP utilizing the Black-Scholes valuation model. Key assumptions of the Black-Scholes valuation model are the risk-free interest rate, expected volatility, expected term and expected dividends. The Company recognizes such compensation expense on a straight-line basis over the requisite vesting period for each award. The fair value of restricted stock awards equals the market value of the underlying stock on the date of grant. These amounts are estimates and, thus, may not be reflective of actual future results, nor amounts ultimately realized by recipients of these grants. The following table summarizes the assumptions used in estimating the fair value of ESPP using the Black-Scholes valuation model: Nine Months Ended September 30, 2021 Risk-free interest rate 0.03 %- 0.16 % Expected term (in years) 0.5 - 2.0 Expected volatility 48.3 %- 60.3 % Dividend yield — % Stock-based compensation expense for the three and nine months ended September 30, 2020 and 2021 is classified in the condensed consolidated statements of operations as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2021 2020 2021 Cost of revenue $ 135 $ 527 $ 360 $ 1,537 Research and development 1,917 11,259 4,686 31,650 Sales and marketing 1,175 6,846 2,717 19,504 General and administrative 1,473 4,776 3,514 15,176 Total $ 4,700 $ 23,408 $ 11,277 $ 67,867 The Company capitalized $ 246 and $ 1,452 of stock-based compensation related to its internal-use software during the three months ended September 30, 2020 and 2021 , respectively, and it capitalized $ 565 and $ 3,813 of stock-based compensation related to its internal-use software during the nine months ended September 30, 2020 and 2021, respectively. As of September 30, 2021 , there was a total of $ 45,635 unrecognized employee compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of approximately 2.18 years. In addition, as of September 30, 2021 , total unrecognized compensation cost related to unvested RSUs was $ 148,999 which is expected to be recognized over a weighted-average period of approximately 2.36 years. Total unrecognized compensation cost related to ESPP as of September 30, 2021 was $ 17,763 , which is expected to be recognized over a weighted-average period of approximately 1.09 years. Common Stock Reserved for Issuance — The Company’s common stock reserved for future issuance as of December 31, 2020 and September 30, 2021 was as follows: December 31, 2020 September 30, 2021 Conversion of convertible preferred stock 75,305,400 — Stock options outstanding 32,458,408 23,885,688 RSUs outstanding 3,276,600 6,831,478 Shares available for future grants 8,098,484 18,151,629 Total shares of common stock reserved 119,138,892 48,868,795

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Net Loss Per Share	10. NET LOSS PER SHARE The following table presents the calculation of basic and diluted net loss per share attributable to common stockholders for the three and nine months ended September 30, 2020 and 2021: Three Months Ended September 30, Nine Months Ended September 30, 2020 2021 2020 2021 Numerator: Net loss attributable to common stockholders $ ( 11,867 ) $ ( 32,451 ) $ ( 40,097 ) $ ( 97,477 ) Denominator: Weighted-average shares used in computing net loss per share attributable to common stockholders—basic and diluted 37,828,682 138,846,394 36,564,569 104,316,176 Net loss per share attributable to common stockholders—basic and diluted $ ( 0.31 ) $ ( 0.23 ) $ ( 1.10 ) $ ( 0.93 ) The following potentially dilutive securities were excluded from the computation of diluted net loss per share calculations for the periods presented because the impact of including them would have been anti-dilutive: September 30, 2020 2021 Redeemable convertible preferred stock 75,305,400 — Common stock options 32,776,771 23,885,688 RSUs 1,254,800 6,831,478 Shares subject to repurchase 73,334 10,449 ESPP — 207,843 Total 109,410,305 30,935,458

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	11. LEASES The Company has entered into various non-cancelable office space operating leases with lease periods expiring through November 2024. These leases do not contain residual value guarantees, covenants, or other restrictions.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. COMMITMENTS AND CONTINGENCIES Purchase Obligations— Purchase obligations relate mainly to a third-party cloud infrastructure agreement and subscription arrangements used to facilitate the Company’s operations as well as an advertising services agreement. As of September 30, 2021 , the Company had approximately $ 50,733 of future minimum payments under the Company’s non-cancelable purchase obligations which is expected to be paid through 2026. Litigation —The Company continually evaluates uncertainties associated with litigation and records a charge equal to at least the minimum estimated liability for a loss contingency when both of the following conditions are met: (i) information available prior to issuance of the financial statements indicates that it is probable that a liability has been incurred at the date of the financial statements and (ii) the loss or range of loss can be reasonably estimated. If the Company determines that a loss is possible and a range of the loss can be reasonably estimated, the Company discloses the range of the possible loss in the notes to the condensed consolidated financial statements. The Company evaluates, on a quarterly basis, developments in its legal matters that could affect the amount of liability that has been previously accrued, if any, and the matters and related ranges of possible losses disclosed, and makes adjustments and changes to our disclosures as appropriate. Significant judgment is required to determine both likelihood of there being, and the estimated amount of, a loss related to such matters. Until the final resolution of such matters, there may be an exposure to loss, and such amounts could be material. For legal proceedings for which there is a reasonable possibility of loss (meaning those losses for which the likelihood is more than remote but less than probable), the Company has determined it does not have material exposure on an aggregate basis at this time. Indemnifications —In the normal course of business, the Company enters into contracts and agreements that contain a variety of representations and warranties and provides for the potential of general indemnification obligations. The Company’s exposure under these agreements is unknown because it involves future claims that may be made against the Company but have not yet been made. To date, the Company has not paid any material claims or has been required to defend any actions related to its indemnification obligations; however, the Company may record charges in the future as a result of these indemnification obligations. In addition, the Company has indemnification agreements with certain of its directors, executive officers, and other employees that require it, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service with the Company. The terms of such obligations may vary.

401(k) Plan

401(k) Plan	9 Months Ended
	Sep. 30, 2021
Compensation And Retirement Disclosure [Abstract]
401(K) Plan	13. 401(k) PLAN The Company has a 401(k) savings plan (the “401(k) Plan”) that qualifies as a deferred salary arrangement under Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, participating employees may elect to contribute up to 100 % of their eligible compensation, subject to certain limitations. The 401(k) Plan provides for a discretionary employer-matching contribution. The Company has made no matching contributions to the 401(k) Plan for the three and nine months ended September 30, 2020 and 2021 .

Related Party Transaction

Related Party Transaction	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related Party Transaction	14. RELATED-PARTY TRANSACTION During the year ended December 31, 2017, the Company entered into a content sourcing agreement with a related party in the normal course of business. Content fees earned by the related party during the three months ended September 30, 2020 and 2021 were $ 1,731 and $ 1,665 respectively. Content fees earned by the related party during the nine months ended September 30, 2020 and 2021 were $ 4,633 and $ 5,056 , respectively. As of December 31, 2020 and September 30, 2021 , outstanding educator partner payables related to this content sourcing agreement were $ 4,821 and $ 1,665 , respectively.

Segment and Geographic Informat

Segment and Geographic Information	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment and Geographic Information	15. SEGMENT AND GEOGRAPHIC INFORMATION The Company’s Chief Executive Officer is its CODM. For the purposes of allocating resources and assessing performance, the CODM examines three segments which are the Company’s three revenue sources: Consumer, Enterprise, and Degrees. This is also consistent with how the Company disaggregates revenue. Financial information for each reportable segment was as follows: Three Months Ended September 30, Nine Months Ended September 30, Revenue 2020 2021 2020 2021 Consumer $ 57,234 $ 66,482 $ 139,845 $ 180,432 Enterprise 18,161 31,840 49,881 84,518 Degrees 7,279 11,558 20,523 35,381 Total revenue $ 82,674 $ 109,880 $ 210,249 $ 300,331 Segment gross profit Consumer $ 31,160 $ 45,499 $ 76,040 $ 115,891 Enterprise 12,520 21,414 34,822 57,011 Degrees 7,279 11,558 20,523 35,381 Total segment gross profit $ 50,959 $ 78,471 $ 131,385 $ 208,283 Reconciliation of segment gross profit to gross profit Platform and support costs 5,211 6,842 14,623 20,218 Stock-based compensation expense 135 527 360 1,537 Amortization of internal-use software 1,554 2,795 4,179 6,783 Amortization of intangibles 355 589 1,056 1,563 Total reconciling items 7,255 10,753 20,218 30,101 Gross profit $ 43,704 $ 67,718 $ 111,167 $ 178,182 Geographic Information: Revenue: The following table summarizes the revenue by region based on the billing address of the Company’s customers: Three Months Ended September 30, Nine Months Ended September 30, 2020 2021 2020 2021 United States $ 40,746 $ 55,451 $ 102,382 $ 152,741 Europe, Middle East, and Africa 22,132 28,863 59,322 81,504 Asia Pacific 11,734 15,424 29,581 39,365 Other 8,062 10,142 18,964 26,721 Total $ 82,674 $ 109,880 $ 210,249 $ 300,331 No single country other than the United States represented 10 % or more of the Company’s total revenue during the three and nine months ended September 30, 2020 and 2021 . Long-lived assets: The following table presents the Company’s long-lived assets, consisting of property, equipment and software, net of depreciation and amortization, and operating lease right-of-use assets, by geographic region: December 31, 2020 September 30, 2021 United States $ 39,202 $ 41,305 Rest of World 1,064 785 Total $ 40,266 $ 42,090

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation —The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), and following the requirements of the Securities and Exchange Commission (“SEC”), for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by GAAP can be condensed or omitted. These unaudited condensed consolidated financial statements have been prepared on the same basis as the Company's annual consolidated financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments, that are necessary for a fair statement of the Company's financial information. The results of operations for the three and nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021 or for any other interim period or for any other future year. The balance sheet as of December 31, 2020 has been derived from audited consolidated financial statements at that date but does not include all information required by GAAP for annual consolidated financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements contained in the Company's final prospectus filed pursuant to Rule 424(b) under the Securities Act of 1933, as amended, with the SEC on March 31, 2021 (the “Prospectus”).
Principles of Consolidation	Principles of Consolidation —The unaudited condensed consolidated financial statements include the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Segment Information	Segment Information —The Company defines its segments as those operations the chief operating decision maker (“CODM”), determined to be the Chief Executive Officer of the Company, regularly reviews to allocate resources and assess performance. For the three and nine months ended September 30, 2020 and 2021 , the Company operated under three segments: Consumer, Enterprise, and Degrees. The Company continually monitors and reviews its segment reporting structure in accordance with Accounting Standards Codification (“ASC”) Topic 280, Segment Reporting , to determine whether any changes have occurred that would impact its reportable segments. For further information on the Company’s segment reporting, see Note 15 “Segment and Geographic Information.”
Use of Estimates	Use of Estimates —The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities and related disclosures at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. On an ongoing basis, the Company evaluates its estimates, including those related to fair value of common stock and stock-based awards; period of benefit for capitalized commissions; internal-use software costs; useful lives of long-lived assets; the carrying value of operating lease right-of-use assets; valuation of intangible assets and income tax expense, including the valuation of deferred tax assets and liabilities, among others. The World Health Organization declared in March 2020 that the outbreak of the coronavirus disease (“COVID-19") constitutes a pandemic. The COVID-19 pandemic has caused general business disruption worldwide beginning in January 2020. The global impact of COVID-19 continues to rapidly evolve, and the Company will continue to monitor the situation and the effects on its business and operations closely. The Company does not yet know the full extent of potential impacts on its business or operations or on the global economy as a whole, particularly if the COVID-19 pandemic continues and persists for an extended period of time. Given the uncertainty, the Company cannot reasonably estimate the impact on its future results of operations, cash flows, or financial condition. As of the date of issuance of the condensed consolidated financial statements, the Company is not aware of any specific event or circumstance that would require it to update its estimates, judgments, or the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained and are recognized in the condensed consolidated financial statements as soon as they become known. Actual results could differ from those estimates, and any such differences may be material to the Company’s condensed consolidated financial statements.
Concentration of Credit Risk	Concentration of Credit Risk —Financial instruments that potentially subject the Company to concentration of credit risk consist of cash, cash equivalents, and marketable securities. The Company invests only in high-credit-quality instruments and maintains its cash equivalents and marketable securities in fixed-income securities. The Company places its cash primarily with domestic financial institutions that are federally insured within statutory limits. For purposes of assessing concentration of credit risk and significant customers, a group of customers under common control or customers that are affiliates of each other are regarded as a single customer. For the three and nine months ended September 30, 2020 and 2021 , the Company did not have any customers that accounted for more than 10 % of the Company’s revenue. As of December 31, 2020 and September 30, 2021, the Company had one customer that accounted for 21 % and 17 % of its net accounts receivable balance, respectively.
New Accounting Pronouncements Recently Adopted and Not Yet Adopted	New Accounting Pronouncements Recently Adopted The Company is an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until those standards apply to private companies. The Company has elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that it (i) is no longer an emerging growth company or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, the condensed consolidated financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public company effective dates. The JOBS Act does not preclude an emerging growth company from early adopting new or revised accounting standards. The Company early adopted ASU 2016-02, Leases (ASC 842), effective January 1, 2020, and ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, effective July 1, 2021. The Company expects to use the extended transition period for any other new or revised accounting standards during the period for which the Company remains an emerging growth company. In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract . This update requires capitalization of the implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. Further, the standard also requires the Company to amortize the capitalized implementation costs of a hosting arrangement over the term of the hosting arrangement. This update is effective for the Company for the annual reporting period commencing January 1, 2021 and interim periods within the annual reporting period commencing January 1, 2022, and early adoption is permitted. The Company early adopted ASU 2018-15 on July 1, 2021 on a prospective basis for implementation costs incurred after January 1, 2021. The adoption of the standard did not have a material impact on the condensed financial statements. New Accounting Pronouncements Not Yet Adopted In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes . This standard simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in Topic 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period, and the recognition of deferred tax liabilities for outside basis differences. The guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill and the allocation of consolidated income taxes to separate financial statements of entities not subject to income tax. ASU 2019-12 will be effective for the Company in 2022. Upon adoption, the Company must apply certain aspects of this standard retrospectively for all periods presented while other aspects are applied on a modified retrospective basis through a cumulative-effect adjustment to accumulated deficit as of the beginning of the fiscal year of adoption. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses , which provides new authoritative guidance with respect to the measurement of credit losses on financial instruments. This update changes the impairment model for most financial assets and certain other instruments by introducing a current expected credit loss (“CECL”) model. The CECL model is a more forward-looking approach based on expected losses rather than incurred losses, requiring entities to estimate and record losses expected over the remaining contractual life of an asset. The guidance will be effective for the Company in 2023 and early adoption beginning in 2019 is permitted. The Company is currently evaluating the impact from the adoption of this guidance on the consolidated financial statements and related disclosures.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue Recognition [Abstract]
Summary of Contract Assets and Liabilities	The Company’s contract assets and liabilities as of January 1, 2020, December 31, 2020 and September 30, 2021 were as follows: January 1, December 31, September 30, Contract assets: Accounts receivable $ 16,592 $ 39,976 $ 30,917 Unbilled revenue 64 745 5,047 Total contract assets $ 16,656 $ 40,721 $ 35,964 Contract liabilities: Deferred revenue $ 41,607 $ 80,642 $ 94,747 Total contract liabilities $ 41,607 $ 80,642 $ 94,747

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements at Fair Value by Level Within Fair Value Hierarchy	The Company’s assets and liabilities that were measured at fair value by level within the fair value hierarchy as of December 31, 2020 and September 30, 2021, were as follows: As of December 31, 2020 Fair Value Level 1 Level 2 Financial assets: Cash equivalents—money market funds $ 58,997 $ 58,997 $ — Marketable securities: Corporate debt securities 8,551 — 8,551 Commercial paper 26,469 — 26,469 U.S. government Treasury bills 170,382 170,382 — Total financial assets $ 264,399 $ 229,379 $ 35,020 As of September 30, 2021 Fair Value Level 1 Financial assets: Cash equivalents—money market funds $ 760,245 $ 760,245 Marketable securities: U.S. government Treasury bills 15,030 15,030 Total financial assets $ 775,275 $ 775,275

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 2021
Investments Debt And Equity Securities [Abstract]
Summary of Available-for-Sale Marketable Securities	The following table presents the Company’s available-for-sale marketable securities as of December 31, 2020 and September 30, 2021: As of December 31, 2020 Amortized Gross Gross Estimated Corporate debt $ 8,547 $ 4 $ — $ 8,551 Commercial paper 26,469 — — 26,469 U.S. government Treasury bills 170,366 17 ( 1 ) 170,382 Total marketable securities $ 205,382 $ 21 $ ( 1 ) $ 205,402 As of September 30, 2021 Amortized Gross Gross Estimated U.S. government Treasury bills $ 15,029 $ 1 $ — $ 15,030 Total marketable securities $ 15,029 $ 1 $ — $ 15,030
Schedule of the Cost Basis and Fair Value of Available-for-sale Securities by Contractual Maturity Date	The following table presents the cost basis and fair value of available-for-sale marketable securities by contractual maturity date as of December 31, 2020 and September 30, 2021: December 31, 2020 September 30, 2021 Amortized Estimated Amortized Estimated Due in one year or less $ 205,382 $ 205,402 $ 15,029 $ 15,030
Schedule of Investments in an Unrealized Loss Position	Investments in an unrealized loss position consisted of the following as of December 31, 2020 and September 30, 2021: December 31, 2020 September 30, 2021 Fair Gross Fair Gross U.S. government Treasury bills $ 20,201 $ ( 1 ) $ — $ — Total investments in an unrealized loss position $ 20,201 $ ( 1 ) $ — $ —

Consolidated Balance Sheet Co_2

Consolidated Balance Sheet Components (Tables)	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Schedule of Property, Equipment and Software	Property, equipment and software as of December 31, 2020 and September 30, 2021, consisted of the following: Estimated December 31, 2020 September 30, 2021 Internal-use software 2 years $ 21,582 $ 34,572 Computer equipment and software 2 years 2,928 4,041 Leasehold improvements Shorter of useful life or 7,057 7,119 Furniture and fixtures 5 years 2,973 3,051 Total property, equipment and software 34,540 48,783 Less accumulated depreciation and amortization ( 15,896 ) ( 24,262 ) Property, equipment and software—net $ 18,644 $ 24,521
Schedule of Intangible Assets	Intangible assets, net as of December 31, 2020 and September 30, 2021 consisted of the following: December 31, 2020 September 30, 2021 Estimated Gross Accumulated Net Gross Accumulated Net Assembled workforce 3 years $ 181 $ ( 83 ) $ 98 $ 181 $ ( 128 ) $ 53 Developed technology 6 years 8,446 ( 1,930 ) 6,516 8,446 ( 2,982 ) 5,464 Content assets 5 years 3,956 — 3,956 5,292 ( 510 ) 4,782 Intangible assets $ 12,583 $ ( 2,013 ) $ 10,570 $ 13,919 $ ( 3,620 ) $ 10,299
Schedule of Future Expected Amortization Expense for Intangible Assets	As of September 30, 2021, future expected amortization expense for intangible assets was as follows: Years Ending December 31 Remainder of 2021 $ 636 2022 2,503 2023 2,465 2024 2,471 2025 1,945 2026 279 Total $ 10,299

Stockholders' Equity (Deficit)

Stockholders' Equity (Deficit) (Tables)	9 Months Ended
	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Stock Option Activity under the Plans	Stock option activity under the Plans for the nine months ended September 30, 2021 was as follows: Number of Weighted- Weighted- Aggregate Balance—December 31, 2020 32,458,408 $ 4.60 7.75 $ 625,058 Granted — — Exercised ( 7,519,696 ) 3.57 Canceled ( 1,053,024 ) 5.57 Balance—September 30, 2021 23,885,688 $ 4.88 7.06 $ 639,320 Options vested 13,752,358 $ 3.37 6.23 $ 388,899
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	RSU activity during the nine months ended September 30, 2021 was as follows: Number of Weighted- Aggregate Unvested balance—December 31, 2020 3,276,600 $ 17.92 $ 19,454 Granted 4,200,228 36.20 Released ( 295,650 ) 12.86 Forfeited ( 349,700 ) 28.65 Unvested balance—September 30, 2021 6,831,478 $ 28.83 $ 216,149
Summary of Estimated Assumptions Used in the Black-Scholes Valuation Model to Value out ESPP Purchase Rights	The following table summarizes the assumptions used in estimating the fair value of ESPP using the Black-Scholes valuation model: Nine Months Ended September 30, 2021 Risk-free interest rate 0.03 %- 0.16 % Expected term (in years) 0.5 - 2.0 Expected volatility 48.3 %- 60.3 % Dividend yield — %
Summary of Stock-Based Compensation Expense in the Consolidated Statements of Operations	Stock-based compensation expense for the three and nine months ended September 30, 2020 and 2021 is classified in the condensed consolidated statements of operations as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2021 2020 2021 Cost of revenue $ 135 $ 527 $ 360 $ 1,537 Research and development 1,917 11,259 4,686 31,650 Sales and marketing 1,175 6,846 2,717 19,504 General and administrative 1,473 4,776 3,514 15,176 Total $ 4,700 $ 23,408 $ 11,277 $ 67,867
Summary of Shares of Common Stock Reserved for Future Issuance	The Company’s common stock reserved for future issuance as of December 31, 2020 and September 30, 2021 was as follows: December 31, 2020 September 30, 2021 Conversion of convertible preferred stock 75,305,400 — Stock options outstanding 32,458,408 23,885,688 RSUs outstanding 3,276,600 6,831,478 Shares available for future grants 8,098,484 18,151,629 Total shares of common stock reserved 119,138,892 48,868,795

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Net Loss Per Share	The following table presents the calculation of basic and diluted net loss per share attributable to common stockholders for the three and nine months ended September 30, 2020 and 2021: Three Months Ended September 30, Nine Months Ended September 30, 2020 2021 2020 2021 Numerator: Net loss attributable to common stockholders $ ( 11,867 ) $ ( 32,451 ) $ ( 40,097 ) $ ( 97,477 ) Denominator: Weighted-average shares used in computing net loss per share attributable to common stockholders—basic and diluted 37,828,682 138,846,394 36,564,569 104,316,176 Net loss per share attributable to common stockholders—basic and diluted $ ( 0.31 ) $ ( 0.23 ) $ ( 1.10 ) $ ( 0.93 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following potentially dilutive securities were excluded from the computation of diluted net loss per share calculations for the periods presented because the impact of including them would have been anti-dilutive: September 30, 2020 2021 Redeemable convertible preferred stock 75,305,400 — Common stock options 32,776,771 23,885,688 RSUs 1,254,800 6,831,478 Shares subject to repurchase 73,334 10,449 ESPP — 207,843 Total 109,410,305 30,935,458

Segment and Geographic Inform_2

Segment and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Schedule of Financial Information for Each Reportable Segment	Financial information for each reportable segment was as follows: Three Months Ended September 30, Nine Months Ended September 30, Revenue 2020 2021 2020 2021 Consumer $ 57,234 $ 66,482 $ 139,845 $ 180,432 Enterprise 18,161 31,840 49,881 84,518 Degrees 7,279 11,558 20,523 35,381 Total revenue $ 82,674 $ 109,880 $ 210,249 $ 300,331 Segment gross profit Consumer $ 31,160 $ 45,499 $ 76,040 $ 115,891 Enterprise 12,520 21,414 34,822 57,011 Degrees 7,279 11,558 20,523 35,381 Total segment gross profit $ 50,959 $ 78,471 $ 131,385 $ 208,283 Reconciliation of segment gross profit to gross profit Platform and support costs 5,211 6,842 14,623 20,218 Stock-based compensation expense 135 527 360 1,537 Amortization of internal-use software 1,554 2,795 4,179 6,783 Amortization of intangibles 355 589 1,056 1,563 Total reconciling items 7,255 10,753 20,218 30,101 Gross profit $ 43,704 $ 67,718 $ 111,167 $ 178,182
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area	The following table summarizes the revenue by region based on the billing address of the Company’s customers: Three Months Ended September 30, Nine Months Ended September 30, 2020 2021 2020 2021 United States $ 40,746 $ 55,451 $ 102,382 $ 152,741 Europe, Middle East, and Africa 22,132 28,863 59,322 81,504 Asia Pacific 11,734 15,424 29,581 39,365 Other 8,062 10,142 18,964 26,721 Total $ 82,674 $ 109,880 $ 210,249 $ 300,331
Schedule of Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country	The following table presents the Company’s long-lived assets, consisting of property, equipment and software, net of depreciation and amortization, and operating lease right-of-use assets, by geographic region: December 31, 2020 September 30, 2021 United States $ 39,202 $ 41,305 Rest of World 1,064 785 Total $ 40,266 $ 42,090

Organization and Description _2

Organization and Description of Business (Details)	Apr. 19, 2021USD ($)shares	Apr. 05, 2021USD ($)$ / sharesshares	Sep. 30, 2021USD ($)shares	Sep. 30, 2020USD ($)	Dec. 31, 2020shares
Subsidiary Sale Of Stock [Line Items]
Net proceeds from common stock sold | $	$ 72,802,000		$ 525,284,000	$ 0
Redeemable convertible preferred stock, shares issued upon conversion			0		75,305,400
Common Stock
Subsidiary Sale Of Stock [Line Items]
Issuance of additional common stock under IPO to underwriter			17,024,276
IPO
Subsidiary Sale Of Stock [Line Items]
Number of shares sold (in shares)		14,664,776
Stock price (in dollars per share) | $ / shares		$ 33
Proceeds from sale of stock, net | $		$ 452,482,000
Issuance of additional common stock under IPO to underwriter	2,359,500
Deferred Offering Costs | $		6,449,000
Underwriting discounts and commissions | $	$ 5,061,000	$ 31,456,000
IPO | Common Stock
Subsidiary Sale Of Stock [Line Items]
Redeemable convertible preferred stock, shares issued upon conversion		75,305,400
Conversion ratio		1

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021Segment	Sep. 30, 2020Segment	Sep. 30, 2021CustomerSegment	Sep. 30, 2020Segment	Dec. 31, 2020Customer
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | Segment	3	3	3	3
Sales Revenue | Customer Concentration Risk | No Customers | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentrations of credit risk, percentage	10.00%	10.00%	10.00%	10.00%
Accounts Receivable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer			1		1
Accounts Receivable | Customer Concentration Risk | Customer One
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentrations of credit risk, percentage			17.00%		21.00%

Revenue Recognition - Summary o

Revenue Recognition - Summary of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Jan. 01, 2020
Contract assets:
Accounts receivable	$ 30,917	$ 39,976	$ 16,592
Unbilled revenue	5,047	745	64
Total contract assets	35,964	40,721	16,656
Contract liabilities:
Deferred revenue	94,747	80,642	41,607
Total contract liabilities	$ 94,747	$ 80,642	$ 41,607

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue Recognition [Abstract]
Revenue Recognized			$ 67,976,000	$ 34,535,000
Impairment losses on contract assets	$ 0	$ 0	0	0
Commissions and related payroll tax expenditures	3,786,000	3,170,000	9,485,000	7,003,000
Amortization, sales and marketing expenses	2,169,000	$ 1,114,000	5,719,000	$ 2,697,000
Deferred costs	6,568,000		6,568,000		$ 5,990,000
Other assets	$ 7,800,000		$ 7,800,000		$ 8,524,000

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information (Details 1) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-10-01 $ in Thousands	Sep. 30, 2021USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligation	$ 240,631
Percent of remaining performance obligations to be recognized	64.00%
Period for satisfaction of remaining performance obligation	12 months

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Measurements at Fair Value by Level Within Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total financial assets	$ 775,275	$ 264,399
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	760,245	58,997
Corporate Debt Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities		8,551
Commercial Paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities		26,469
U.S. Government Treasury Bills
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	15,030	170,382
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total financial assets	775,275	229,379
Level 1 | Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	760,245	58,997
Level 1 | U.S. Government Treasury Bills
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	$ 15,030	170,382
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total financial assets		35,020
Level 2 | Corporate Debt Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities		8,551
Level 2 | Commercial Paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities		$ 26,469

Marketable Securities - Summary

Marketable Securities - Summary of Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 15,029	$ 205,382
Gross Unrealized Gains	1	21
Gross Unrealized Losses	0	(1)
Estimated Fair Market Value	15,030	205,402
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		8,547
Gross Unrealized Gains		4
Estimated Fair Market Value		8,551
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		26,469
Estimated Fair Market Value		26,469
U.S. Government Treasury Bills
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	15,029	170,366
Gross Unrealized Gains	1	17
Gross Unrealized Losses	0	(1)
Estimated Fair Market Value	$ 15,030	$ 170,382

Marketable Securities - Schedul

Marketable Securities - Schedule of the Cost Basis and Fair Value of Available-for-sale Securities by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Amortized Cost	$ 15,029	$ 205,382
Estimated Fair Market Value	$ 15,030	$ 205,402

Marketable Securities - Sched_2

Marketable Securities - Schedule of Investments in an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Fair Value	$ 0	$ 20,201
Gross Unrealized Losses	0	(1)
U.S. Government Treasury Bills
Schedule Of Available For Sale Securities [Line Items]
Fair Value	0	20,201
Gross Unrealized Losses	$ 0	$ (1)

Marketable Securities - Additio

Marketable Securities - Additional Information (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Investments in a continuous unrealized loss position for more than 12 months	$ 0	$ 0

Consolidated Balance Sheet Co_3

Consolidated Balance Sheet Components - Schedule of Property, Equipment and Software (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Total property, equipment, and software	$ 48,783	$ 34,540
Less accumulated depreciation and amortization	(24,262)	(15,896)
Property, equipment, and software—net	$ 24,521	18,644
Internal-use Software
Property Plant And Equipment [Line Items]
Property, equipment, and software, Useful Life	2 years
Total property, equipment, and software	$ 34,572	21,582
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Property, equipment, and software, Useful Life	2 years
Total property, equipment, and software	$ 4,041	2,928
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property, equipment, and software	$ 7,119	7,057
Property, equipment, and software, Useful Life	Shorter of useful life orremaining lease term
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property, equipment, and software, Useful Life	5 years
Total property, equipment, and software	$ 3,051	$ 2,973

Consolidated Balance Sheet Co_4

Consolidated Balance Sheet Components - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Depreciation and amortization			$ 10,508	$ 6,873
Amortization expenses of intangible assets	$ 604	$ 370	1,607	1,101
Intangible assets	10,299		$ 10,299		$ 10,570
Assembled Workforce
Property Plant And Equipment [Line Items]
Weighted average remaining amortization period for intangible asset			10 months 24 days
Developed Technology
Property Plant And Equipment [Line Items]
Weighted average remaining amortization period for intangible asset			3 years 10 months 24 days
Content Asset
Property Plant And Equipment [Line Items]
Intangible assets	1,336	567	$ 1,336	567
Weighted average remaining amortization period for intangible asset			4 years 6 months
Property, Equipment and Software
Property Plant And Equipment [Line Items]
Depreciation and amortization	3,533	2,139	$ 8,901	5,772
Internal-use Software
Property Plant And Equipment [Line Items]
Amortization expenses of intangible assets	$ 2,795	$ 1,554	$ 6,783	$ 4,179

Consolidated Balance Sheet Co_5

Consolidated Balance Sheet Components - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross carrying value	$ 13,919	$ 12,583
Accumulated amortization	(3,620)	(2,013)
Net carrying value	$ 10,299	10,570
Assembled Workforce
Finite Lived Intangible Assets [Line Items]
Estimated useful lives	3 years
Gross carrying value	$ 181	181
Accumulated amortization	(128)	(83)
Net carrying value	$ 53	98
Developed Technology
Finite Lived Intangible Assets [Line Items]
Estimated useful lives	6 years
Gross carrying value	$ 8,446	8,446
Accumulated amortization	(2,982)	(1,930)
Net carrying value	$ 5,464	6,516
Content Asset
Finite Lived Intangible Assets [Line Items]
Estimated useful lives	5 years
Gross carrying value	$ 5,292	3,956
Accumulated amortization	(510)	0
Net carrying value	$ 4,782	$ 3,956

Consolidated Balance Sheet Co_6

Consolidated Balance Sheet Components - Schedule of Future Expected Amortization Expense for Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Remainder of 2021	$ 636
2022	2,503
2023	2,465
2024	2,471
2025	1,945
2026	279
Net carrying value	$ 10,299	$ 10,570

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Effective tax rate	(2.53%)	(2.82%)	(1.97%)	(1.99%)
Provision for income taxes	$ 0		$ 0

Redeemable Convertible Prefer_2

Redeemable Convertible Preferred Stock - Additional Information (Details) - shares	Apr. 05, 2021	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares issued upon conversion		0	75,305,400
Temporary equity, shares issued (in shares)		0	75,305,400
Temporary equity, shares outstanding (in shares)		0	75,305,400
Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Temporary equity, shares issued (in shares)		0
Temporary equity, shares outstanding (in shares)		0	75,305,400	75,305,400	67,658,342	67,658,342
IPO | Common Stock
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares issued upon conversion	75,305,400
Redeemable convertible preferred stock, conversion rate	one-for-one

Stockholders' Equity (Deficit_2

Stockholders' Equity (Deficit) - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Apr. 05, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)	10,000,000		10,000,000		0
Preferred stock, par value (in dollars per share)	$ 0.00001		$ 0.00001		$ 0.00001
Preferred stock, shares issued (in shares)	0		0		0
Preferred stock, shares outstanding (in shares)	0		0		0
Shares available for grant	18,151,629		18,151,629		8,098,484
Employees percentage of eligible compensation may elect to contribute			100.00%
Shares reserved for issuance	48,868,795		48,868,795		119,138,892
Aggregate intrinsic value of employee options exercised			$ 264,326
cumulative stock-based compensation expense			16,803
Allocated Share Based Compensation Expense	$ 23,408	$ 4,700	67,867	$ 11,277
Compensation cost related to the nonvested awards not yet recognized	45,635		$ 45,635
Weighted average period for recognition of compensation cost			2 years 2 months 4 days
Internal-use Software
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share Based Compensation Expense	1,452	$ 246	$ 3,813	$ 565
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, expiration period			10 years
Vesting period			4 years
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Cliff vesting period					1 year
Compensation cost related to the nonvested awards not yet recognized	$ 148,999		$ 148,999
Weighted average period for recognition of compensation cost			2 years 4 months 9 days
2013 and 2014 Executive Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for grant	0		0
2021 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance	15,351,629		15,351,629
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employees percentage of eligible compensation may elect to contribute			15.00%
Percent of the lower of the market price for Purchase shares of common stock			85.00%
Shares reserved for issuance	2,800,000		2,800,000
Compensation cost related to the nonvested awards not yet recognized	$ 17,763		$ 17,763
Weighted average period for recognition of compensation cost			1 year 1 month 2 days
IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)						10,000,000
Preferred stock, par value (in dollars per share)						$ 0.00001

Stockholders' Equity (Deficit )

Stockholders' Equity (Deficit )- Schedule of Stock Option Activity under the Plans (Details) - Stock Options $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)$ / sharesshares	Dec. 31, 2020USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning balance | shares	32,458,408
Number of Shares, Options exercised | shares	(7,519,696)
Number of Shares, Options canceled | shares	(1,053,024)
Number of Shares, Ending balance | shares	23,885,688	32,458,408
Number of Shares, Options vested | shares	13,752,358
Weighted Average Exercise Price, Beginning balance | $ / shares	$ 4.60
Weighted Average Exercise Price, Options exercised | $ / shares	3.57
Weighted Average Exercise Price, Canceled | $ / shares	5.57
Weighted Average Exercise Price, Ending balance | $ / shares	4.88	$ 4.60
Weighted Average Exercise Price, Options vested | $ / shares	$ 3.37
Weighted Average Remaining Contractual Term	7 years 21 days	7 years 9 months
Weighted Average Remaining Contractual Term, Options vested	6 years 2 months 23 days
Aggregate Intrinsic Value, Beginning balance | $	$ 625,058
Aggregate Intrinsic Value, Ending balance | $	639,320	$ 625,058
Aggregate Intrinsic Value, Options vested | $	$ 388,899

Stockholders' Equity (Deficit_3

Stockholders' Equity (Deficit) - Schedule of Share-based Compensation, Restricted Stock Units Award Activity (Details) - Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Unvested beginning balance	3,276,600
Number of Shares, Granted	4,200,228
Number of Shares, Released	(295,650)
Number of Shares, Forfeited	(349,700)
Number of Shares, Unvested ending balance	6,831,478
Weighted- Average Grant Fair Value, Unvested beginning balance	$ 17.92
Weighted- Average Grant Fair Value, Granted	36.20
Weighted- Average Grant Fair Value, Released	12.86
Weighted- Average Grant Fair Value, Forfeited	28.65
Weighted- Average Grant Fair Value, Unvested ending balance	$ 28.83
Aggregate Intrinsic Value, Unvested balance	$ 216,149	$ 19,454

Stockholders' Equity (Deficit_4

Stockholders' Equity (Deficit) - Summary of Estimated Assumptions Used in the Black-Scholes Valuation Model to Value out ESPP Purchase Rights (Details)	9 Months Ended
	Sep. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	0.03%
Expected term (in years)	6 months
Expected volatility	48.30%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	0.16%
Expected term (in years)	2 years
Expected volatility	60.30%

Stockholders' Equity (Deficit_5

Stockholders' Equity (Deficit) - Summary of Stock-Based Compensation Expense in the Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost of revenue	$ 23,408	$ 4,700	$ 67,867	$ 11,277
Cost of Revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost of revenue	527	135	1,537	360
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost of revenue	11,259	1,917	31,650	4,686
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost of revenue	6,846	1,175	19,504	2,717
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost of revenue	$ 4,776	$ 1,473	$ 15,176	$ 3,514

Stockholders' Equity (Deficit_6

Stockholders' Equity (Deficit) - Summary of Shares of Common Stock Reserved for Future Issuance (Details) - shares	Sep. 30, 2021	Dec. 31, 2020
Equity [Abstract]
Conversion of convertible preferred stock	0	75,305,400
Stock options outstanding	23,885,688	32,458,408
RSUs outstanding	6,831,478	3,276,600
Shares available for future grants	18,151,629	8,098,484
Total shares of common stock reserved	48,868,795	119,138,892

Net Loss Per Share - Calculatio

Net Loss Per Share - Calculation of Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net loss attributable to common stockholders	$ (32,451)	$ (11,867)	$ (97,477)	$ (40,097)
Denominator:
Weighted average shares used in computing net loss per share attributable to common stockholders—basic and diluted (in shares)	138,846,394	37,828,682	104,316,176	36,564,569
Net loss per share attributable to common stockholders—basic and diluted (in dollars per share)	$ (0.23)	$ (0.31)	$ (0.93)	$ (1.10)

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Securities with a Potentially Dilutive Impact (Details) - shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings per share (in shares)	30,935,458	109,410,305
Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings per share (in shares)	0	75,305,400
Common Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings per share (in shares)	23,885,688	32,776,771
RSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings per share (in shares)	6,831,478	1,254,800
Shares Subject to Repurchase
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings per share (in shares)	10,449	73,334
ESPP
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings per share (in shares)	207,843	0

Commitments and Contingencies (

Commitments and Contingencies (Additional Information) (Details) $ in Thousands	Sep. 30, 2021USD ($)
Commitments And Contingencies Disclosure [Abstract]
Non-cancelable purchase obligations	$ 50,733

401(k) Plan (Details)

401(k) Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Compensation And Retirement Disclosure [Abstract]
Employees percentage of eligible compensation may elect to contribute			100.00%
Employer discretionary contribution amount	$ 0	$ 0	$ 0	$ 0

Related Party Transaction - Add

Related Party Transaction - Additional Information (Details) - Content Sourcing Agreement - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Related party content fees	$ 1,665	$ 1,731	$ 5,056	$ 4,633
Outstanding to educator partner payables	$ 1,665		$ 1,665		$ 4,821

Segment and Geographic Inform_3

Segment and Geographic Information - Segment Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue
Revenue	$ 109,880	$ 82,674	$ 300,331	$ 210,249
Segment gross profit
Total segment gross profit	78,471	50,959	208,283	131,385
Platform and support costs	6,842	5,211	20,218	14,623
Stock-based compensation expense	527	135	1,537	360
Segment amortization	604	370	1,607	1,101
Total reconciling items	10,753	7,255	30,101	20,218
Gross profit	67,718	43,704	178,182	111,167
Internal Use Software [Member]
Segment gross profit
Segment amortization	2,795	1,554	6,783	4,179
Acquired Intangibles [Member]
Segment gross profit
Segment amortization	589	355	1,563	1,056
Consumer Segment [Member]
Revenue
Revenue	66,482	57,234	180,432	139,845
Segment gross profit
Total segment gross profit	45,499	31,160	115,891	76,040
Enterprise Segment [Member]
Revenue
Revenue	31,840	18,161	84,518	49,881
Segment gross profit
Total segment gross profit	21,414	12,520	57,011	34,822
Degrees Segment [Member]
Revenue
Revenue	11,558	7,279	35,381	20,523
Segment gross profit
Total segment gross profit	$ 11,558	$ 7,279	$ 35,381	$ 20,523

Segment and Geographic Inform_4

Segment and Geographic Information - Summary of Revenue By Region Based On Billing Address (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 109,880	$ 82,674	$ 300,331	$ 210,249
United States
Segment Reporting Information [Line Items]
Revenue	55,451	40,746	152,741	102,382
Europe, Middle East, and Africa [Member]
Segment Reporting Information [Line Items]
Revenue	28,863	22,132	81,504	59,322
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenue	15,424	11,734	39,365	29,581
Other [Member]
Segment Reporting Information [Line Items]
Revenue	$ 10,142	$ 8,062	$ 26,721	$ 18,964

Segment and Geographic Inform_5

Segment and Geographic Information - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Concentration risk, benchmark description			No single country other than the United States represented 10% or more of the Company’s total revenue during the three and nine months ended September 30, 2020 and 2021.
Revenue | Geographic Concentration Risk | United States | Minimum
Segment Reporting Information [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%

Segment and Geographic Inform_6

Segment and Geographic Information - Summary of Long Lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Noncurrent Assets	$ 42,090	$ 40,266
United States
Segment Reporting Information [Line Items]
Noncurrent Assets	41,305	39,202
Rest of World [Member]
Segment Reporting Information [Line Items]
Noncurrent Assets	$ 785	$ 1,064