CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 63,527	$ 76,333
Collaboration receivable, current - related party	50,761	49,152
Other receivables	4,734	1,545
Prepaid expenses and other current assets	3,196	4,178
Total current assets	122,218	131,208
Property and equipment, net	0	2
Operating lease right of use assets	3,644	4,155
Collaboration receivable, non-current - related party	23,585	46,590
Other assets	434	435
Total assets	149,881	182,390
Current liabilities:
Accounts payable	2,696	1,378
Accrued expenses and other current liabilities	10,011	6,557
Operating lease liabilities	1,732	1,718
Income taxes payable	387	387
Deferred revenue, current	3,663	2,132
Deferred revenue, current - related party	27,144	24,981
Total current liabilities	45,633	37,153
Non-current operating lease liabilities	3,206	3,825
Deferred revenue, non-current	9,040	10,825
Deferred revenue, non-current - related party	11,477	23,606
Other long-term liabilities	25	87
Total liabilities	69,381	75,496
Commitments and contingencies (Note 7)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized, no shares issued and outstanding as of June 30, 2024 and December 31, 2023	0	0
Common stock, $0.001 par value; 120,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 54,009,139 shares issued and outstanding as of June 30, 2024 and 52,999,680 shares issued and outstanding as of December 31, 2023	54	53
Additional paid-in capital	502,049	497,913
Accumulated deficit	(421,603)	(391,072)
Total stockholders' equity	80,500	106,894
Total liabilities and stockholders' equity	$ 149,881	$ 182,390