Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 46,004	$ 76,124
Marketable securities, current	245,170	233,155
Accounts receivable	1,773	5,716
Prepaid expenses and other current assets	9,999	10,694
Total current assets	302,946	325,689
Marketable securities, non-current	130,478	142,200
Property and equipment, net	3,026	3,108
Right-of-use asset	74,828	31,945
Restricted cash	3,279	3,279
Other assets	928	544
Total assets	515,485	506,765
Current liabilities:
Accounts payable	3,405	4,506
Accrued expenses and other current liabilities	9,840	13,606
Deferred revenue, current	31,266	31,800
Operating lease liability, current	1,727	1,334
Long-term debt − related party, current	750
Total current liabilities	46,988	51,246
Deferred revenue, net of current	19,020	24,368
Operating lease liability, net of current	74,754	30,777
Long-term debt − related party, net of current	10,194	10,768
Total liabilities	150,956	117,159
Commitments and contingencies
Stockholders’ equity:
Preferred stock, par value of $0.0001 per share; 10,000,000 shares authorized, and no shares issued or outstanding as of March 31, 2022 and December 31, 2021, respectively
Common stock, par value of $0.0001 per share; 150,000,000 shares authorized, and 48,751,490 and 48,688,875 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	5	5
Additional paid-in capital	667,509	658,091
Accumulated other comprehensive (loss) income	(3,650)	(775)
Accumulated deficit	(299,335)	(267,715)
Total stockholders’ equity	364,529	389,606
Total liabilities and stockholders’ equity	$ 515,485	$ 506,765