CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 19,208	$ 19,841
Marketable securities	90,011	110,406
Accounts receivable from collaboration	0	43
Prepaid expenses and other current assets	3,712	3,497
Total current assets	112,931	133,787
Property and equipment, net	349	385
Operating lease right-of-use (ROU) assets	1,731	2,339
Other assets	312	312
Total assets	115,323	136,823
Current liabilities
Accounts payable	801	461
Accrued research and development expenses	2,531	885
Other accrued expenses	3,587	5,744
Deferred revenue from a related party - short-term	33,060	30,915
Operating lease liabilities - short-term	1,295	1,220
Total current liabilities	41,274	39,225
Deferred revenue from a related party - long-term	38,916	55,379
Operating lease liabilities - long-term	451	1,122
Total liabilities	80,641	95,726
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value; 150,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 6,345,561 and 5,482,752 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively	6	5
Additional paid-in capital	840,946	826,921
Accumulated other comprehensive loss	(293)	(81)
Accumulated deficit	(805,977)	(785,748)
Total stockholders' equity	34,682	41,097
Total liabilities and stockholders' equity	$ 115,323	$ 136,823