Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 245,217	$ 273,314
Accounts receivable, net of allowances of $3,099 and $7,147 at December 31, 2021 and 2020, respectively	16,710	32,923
Prepaid expenses	6,145	5,800
Other current assets	1,866	12,901
Total current assets	269,938	324,938
Property and equipment, net	19,155	21,421
Operating lease right-of-use assets	23,605	29,192
Goodwill	51,205	51,205
Intangible assets, net	4,950	6,600
Equity method investment	14,500	19,905
Other assets	4,317	4,800
Total assets	387,670	458,061
Current liabilities
Accounts payable (includes related party payables of $1,128 and $913 at December 31, 2021 and 2020, respectively)	11,364	13,198
Accrued employee expenses	5,187	6,506
Operating lease liabilities, current	5,253	4,771
Accrued expenses and other current liabilities	9,677	18,402
Total current liabilities	31,481	42,877
Deferred tax liabilities	103	40
Operating lease liabilities, net of current portion	26,300	31,974
Other liabilities	0	388
Total liabilities	57,884	75,279
Commitments and contingencies
Stockholders’ Equity
Preferred stock — $0.0001 par value; 20,000,000 shares authorized at December 31, 2021 and 2020, respectively; no shares issued and outstanding at December 31, 2021 and 2020	0	0
Common stock — $0.0001 par value; 1,000,000,000 shares authorized at December 31, 2021 and 2020, respectively; 96,213,243 and 99,690,942 shares issued and outstanding at December 31, 2021 and 2020, respectively	10	10
Additional paid-in capital	723,623	738,290
Accumulated deficit	(393,847)	(355,518)
Total stockholders’ equity	329,786	382,782
Total liabilities and stockholders’ equity	$ 387,670	$ 458,061