Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 320,817	$ 580,658
Marketable securities	459,654	241,117
Accounts receivable, net of allowance for credit losses of $495 and $105 as of December 31, 2022 and December 31, 2021, respectively	53,734	34,396
Deferred costs, net	24,147	19,666
Prepaid expenses and other current assets	17,636	16,494
Total current assets	875,988	892,331
Property, equipment and software, net	27,096	24,725
Operating lease right-of-use assets	9,605	16,321
Intangible assets, net	8,553	10,091
Other assets	26,355	15,442
Total assets	947,597	958,910
Current liabilities:
Educator partners payable	66,375	49,206
Other accounts payable and accrued expenses	23,342	23,257
Accrued compensation and benefits	21,163	18,353
Operating lease liabilities, current	8,658	8,031
Deferred revenue, current	115,701	94,637
Other current liabilities	7,202	7,639
Total current liabilities	242,441	201,123
Operating lease liabilities, non-current	5,791	11,864
Deferred revenue, non-current	3,076	3,851
Other liabilities	1,714	559
Total liabilities	253,022	217,397
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.00001 par value-10,000,000 shares authorized as of December 31, 2022 and December 31, 2021; no shares issued and outstanding as of December 31, 2022 and December 31, 2021	0	0
Common stock, $0.00001 par value-300,000,000 shares authorized as of December 31, 2022 and December 31, 2021; 150,683,607 shares issued and 147,935,669 shares outstanding as of December 31, 2022, and 144,653,979 shares issued and 141,906,041 shares outstanding as of December 31, 2021	1	1
Additional paid-in capital	1,364,116	1,235,231
Treasury stock at cost, 2,747,938 shares as of December 31, 2022 and December 31, 2021	(4,701)	(4,701)
Accumulated other comprehensive loss	(718)	(252)
Accumulated deficit	(664,123)	(488,766)
Total stockholders' equity	694,575	741,513
Total liabilities and stockholders' equity	$ 947,597	$ 958,910