Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 507,157	$ 320,817
Marketable securities	213,996	459,654
Accounts receivable, net of allowance for credit losses of $196 and $495 as of September 30, 2023 and December 31, 2022	62,104	53,734
Deferred costs, net	26,428	24,147
Prepaid expenses and other current assets	19,450	17,636
Total current assets	829,135	875,988
Property, equipment, and software, net	29,699	27,096
Operating lease right-of-use assets	5,975	9,605
Intangible assets, net	10,690	8,553
Other assets	38,846	26,355
Total assets	914,345	947,597
Current liabilities:
Educator partners payable	98,063	66,375
Other accounts payable and accrued expenses	25,108	23,342
Accrued compensation and benefits	18,912	21,163
Operating lease liabilities, current	7,376	8,658
Deferred revenue, current	138,687	115,701
Other current liabilities	7,497	7,202
Total current liabilities	295,643	242,441
Operating lease liabilities, non-current	1,093	5,791
Deferred revenue, non-current	2,540	3,076
Other liabilities	1,668	1,714
Total liabilities	300,944	253,022
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.00001 par value—10,000,000 shares authorized and no shares issued and outstanding as of September 30, 2023 and December 31, 2022	0	0
Common stock, $0.00001 par value—300,000,000 shares authorized as of September 30, 2023 and December 31, 2022; 159,836,721 shares issued and 152,258,980 shares outstanding as of September 30, 2023, and 150,683,607 shares issued and 147,935,669 shares outstanding as of December 31, 2022	2	1
Additional paid-in capital	1,437,092	1,364,116
Treasury stock—at cost, 7,577,741 and 2,747,938 shares as of September 30, 2023 and December 31, 2022	(63,154)	(4,701)
Accumulated other comprehensive loss	(219)	(718)
Accumulated deficit	(760,320)	(664,123)
Total stockholders’ equity	613,401	694,575
Total liabilities and stockholders’ equity	$ 914,345	$ 947,597