Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 60,971	$ 29,754
Marketable securities, current	155,598	246,399
Accounts receivable	500	1,473
Prepaid expenses and other current assets	6,617	9,931
Total current assets	223,686	287,557
Marketable securities, non-current	29,857	60,962
Property and equipment, net	7,290	7,400
Right-of-use asset	65,520	70,116
Restricted cash	3,454	3,279
Other assets	3,206	1,526
Total assets	333,013	430,840
Current liabilities:
Accounts payable	1,276	1,172
Accrued expenses and other current liabilities	15,484	19,769
Deferred revenue, current	8,424	16,618
Operating lease liability, current	5,087	4,700
Long-term debt − related party, current and net of discount	0	2,287
Total current liabilities	30,271	44,546
Deferred revenue, net of current	19,623	16,895
Operating lease liability, net of current	67,095	70,970
Long-term debt − related party, net of current and discount	0	9,195
Total liabilities	116,989	141,606
Commitments and contingencies (see Note 11)
Stockholders’ equity:
Preferred stock, par value of $0.0001 per share; 10,000,000 shares authorized, and no shares issued or outstanding as of September 30, 2023 and December 31, 2022, respectively	0	0
Common stock, par value of $0.0001 per share; 150,000,000 shares authorized, and 49,259,870 and 48,966,216 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	5	5
Additional paid-in capital	710,552	689,256
Accumulated other comprehensive loss	(904)	(4,137)
Accumulated deficit	(493,629)	(395,890)
Total stockholders’ equity	216,024	289,234
Total liabilities and stockholders’ equity	$ 333,013	$ 430,840