Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 49,106	$ 92,046
Short-term marketable securities	219,514	154,724
Accounts receivable	288	1,103
Prepaid expenses and other current assets	3,281	3,123
Total current assets	272,189	250,996
Restricted cash	106	106
Long-term marketable securities	55,171	121,293
Property and equipment, net	7,163	4,763
Right-of-use assets	3,204	3,898
Other non-current assets	174	291
Total assets	338,007	381,347
Current liabilities
Accounts payable	4,227	2,100
Accrued liabilities	16,230	12,320
Contract liability	35,849	29,040
Operating lease liabilities - current	1,783	1,699
Total current liabilities	58,089	45,159
Long-term contract liability	8,025	31,192
Long-term operating lease liabilities	2,572	3,482
Total liabilities	68,686	79,833
Commitments and contingencies (Note 5)
Stockholders’ equity
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of June 30, 2022 and December 31, 2021; no shares issued and outstanding as of June 30,2022 and December 31, 2021
Common stock, $0.0001 par value, 300,000,000 shares authorized as of June 30, 2022 and December 31, 2022; 38,704,010 and 38,533,045 shares issued and outstanding as of June 30, 2022 and December 31, 2021	4	4
Additional paid-in capital	485,763	478,970
Accumulated other comprehensive loss	(3,629)	(712)
Accumulated deficit	(212,817)	(176,748)
Total stockholders’ equity	269,321	301,514
Total liabilities and stockholders’ equity	$ 338,007	$ 381,347