Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 267,073	$ 273,314
Accounts receivable, net of allowances of $5,789 and $7,147 at June 30, 2021 and December 31, 2020, respectively	22,835	32,923
Prepaid expenses	8,499	5,800
Other current assets	3,991	12,901
Total current assets	302,398	324,938
Property and equipment, net	19,456	21,421
Operating lease right-of-use assets	25,758	29,192
Goodwill	51,205	51,205
Intangible assets, net	5,775	6,600
Equity method investment	19,219	19,905
Other assets	4,723	4,800
Total assets	428,534	458,061
Current liabilities
Accounts payable (includes related party payables of $1,072 and $913 at June 30, 2021 and December 31, 2020, respectively)	16,397	13,198
Accrued employee expenses	5,358	6,506
Operating lease liabilities, current	4,971	4,771
Accrued expenses and other current liabilities	14,243	18,402
Total current liabilities	40,969	42,877
Deferred tax liabilities	90	40
Operating lease liabilities, net of current portion	29,223	31,974
Other liabilities	22	388
Total liabilities	70,304	75,279
Commitments and contingencies (Note 8)
Stockholders’ Equity
Preferred stock — $0.0001 par value; 20,000,000 shares authorized at June 30, 2021 and December 31, 2020; no shares issued and outstanding at June 30, 2021 and December 31, 2020	0	0
Common stock — $0.0001 par value; 1,000,000,000 shares authorized at June 30, 2021 and December 31, 2020; 97,613,457 and 99,690,942 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	10	10
Additional paid-in capital	729,439	738,290
Accumulated deficit	(371,219)	(355,518)
Total stockholders’ equity	358,230	382,782
Total liabilities and stockholders’ equity	$ 428,534	$ 458,061