Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 67,237	$ 68,632
Short-term marketable securities	272,233	296,197
Accounts receivable	468	211
Prepaid expenses and other current assets	4,020	5,414
Total current assets	343,958	370,454
Restricted cash	106	106
Long-term marketable securities	11,740	8,317
Property and equipment, net	6,716	6,509
Right-of-use assets	2,112	2,484
Other non-current assets	114	99
Total assets	364,746	387,969
Current liabilities
Accounts payable	4,376	4,280
Accrued liabilities	17,274	16,999
Contract liability	6,255	8,568
Operating lease liabilities - current	1,915	1,871
Total current liabilities	29,820	31,718
Long-term contract liability	0	5,185
Long-term operating lease liabilities	1,116	1,611
Total liabilities	30,936	38,514
Commitments and contingencies (Note 5)
Stockholders’ equity
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of March 31, 2023 and December 31, 2022; no shares issued and outstanding as of March 31, 2023 and December 31, 2022
Common stock, $0.0001 par value, 300,000,000 shares authorized as of March 31, 2023 and December 31, 2022; 48,390,394 and 48,193,179 shares issued and outstanding as of March 31, 2023 and December 31, 2022	5	5
Additional paid-in capital	594,253	587,724
Accumulated other comprehensive loss	(1,405)	(2,871)
Accumulated deficit	(259,043)	(235,403)
Total stockholders’ equity	333,810	349,455
Total liabilities and stockholders’ equity	$ 364,746	$ 387,969