CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 55,816	$ 73,456
Short-term marketable securities	88,369	198,036
Prepaid expenses and other current assets	9,202	9,787
Restricted cash	2,999	0
Total current assets	156,444	288,859
Property and equipment, net	7,033	8,496
Operating lease right-of-use asset	0	2,096
Restricted cash	2,455	3,954
Other non-current assets	2,936	3,997
Total assets	168,868	307,402
Current liabilities:
Accounts payable	2,982	8,453
Accrued liabilities	17,099	33,638
Operating lease liability, current	0	5,385
Contract liabilities	0	366
Total current liabilities	20,081	47,842
Other non-current liabilities	149	0
Total liabilities	20,230	47,842
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; no shares issued or outstanding as of December 31, 2023 and 2022, respectively	0	0
Common stock, $0.001 par value; 400,000 shares authorized; 82,907 and 81,885 shares issued and outstanding as of December 31, 2023 and 2022, respectively	83	82
Additional paid-in capital	872,545	841,413
Accumulated other comprehensive income (loss)	18	(302)
Accumulated deficit	(724,008)	(581,633)
Total stockholders' equity	148,638	259,560
Total liabilities and stockholders' equity	168,868	307,402
Related Party
Current assets:
Related party receivable from collaboration	$ 58	$ 7,580