BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 18,201	$ 30,605
Marketable securities	154,054	171,123
Prepaid expenses and other current assets	3,008	2,652
Total current assets	175,263	204,380
Restricted cash	4,044	4,044
Property and equipment, net	5,371	4,908
Right-of-use asset	1,360	1,792
Prepaid expenses and other non-current assets	12,282	5,376
Total assets	198,320	220,500
Current liabilities:
Accounts payable	7,082	6,777
Accrued expenses and other current liabilities	11,190	13,093
Operating lease liability	1,390	1,832
Total current liabilities	19,662	21,702
Other liabilities	3,361	3,361
Total liabilities	23,023	25,063
Commitments (Note 8)
Stockholders’ equity:
Additional paid-in capital	537,966	531,682
Accumulated other comprehensive (loss)	(398)	(1,692)
Accumulated deficit	(362,276)	(334,558)
Total stockholders’ equity	175,297	195,437
Total liabilities and stockholders’ equity	198,320	220,500
Voting Common Stock
Stockholders’ equity:
Common stock	4	4
Non-voting Common Stock
Stockholders’ equity:
Common stock	$ 1	$ 1