CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 181,822	$ 92,076
Marketable securities	83,063	279,915
Prepaid expenses and other current assets	5,218	4,926
Total current assets	270,103	376,917
Property and equipment, net	2,002	2,282
Operating lease right-of-use asset	2,625	3,777
Other non-current assets	187	191
Total assets	274,917	383,167
Current liabilities:
Accounts payable	9,168	1,517
Accrued expenses	15,958	21,911
Operating lease liability, current	1,638	1,559
Other current liabilities	27	44
Total current liabilities	26,791	25,031
Operating lease liability, non-current	927	2,165
Other non-current liability	700	0
Early-exercise liability	0	1
Total liabilities	28,418	27,197
Commitments and contingencies (Note 9)
Stockholders' equity (deficit):
Preferred stock (undesignated), $0.0001 par value; 10,000,000 shares authorized and no shares issued and outstanding at September 30, 2023 and December 31, 2022	0	0
Common stock, $0.0001 par value; 1,000,000,000 shares authorized, 109,846,329 shares issued and outstanding at September 30, 2023; 109,044,046 shares issued and outstanding at December 31, 2022	11	11
Additional paid-in capital	904,905	889,657
Accumulated other comprehensive loss	(2)	(272)
Accumulated deficit	(658,415)	(533,426)
Total stockholders' equity	246,499	355,970
Total liabilities, preferred stock and stockholders' equity	$ 274,917	$ 383,167