CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 76,333	$ 109,107
Collaboration receivable, current - related party	49,152	0
Other receivables	1,545	1,084
Prepaid expenses and other current assets	4,178	3,379
Total current assets	131,208	113,570
Property and equipment, net	2	368
Collaboration receivable, non-current - related party	46,590	0
Operating lease right-of-use assets	4,155	5,124
Other assets	435	5,740
Total assets	182,390	124,802
Current liabilities:
Accounts payable	1,378	617
Accrued expenses and other current liabilities	6,557	8,973
Operating lease liabilities	1,718	1,690
Income taxes payable	387	0
Deferred Revenue, Current	2,132	4,149
Deferred revenue, current - related party	24,981	6,220
Total current liabilities	37,153	21,649
Non-current operating lease liabilities	3,825	4,957
Deferred revenue, non-current	10,825	9,741
Deferred revenue, non-current - related party	23,606	12,425
Other long-term liabilities	87	96
Total liabilities	75,496	48,868
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized, no shares issued and outstanding as of December 31, 2023 and 2022	0	0
Common stock, $0.001 par value; 120,000,000 shares authorized as of December 31, 2023 and 2022; 52,999,680 shares issued and outstanding as of December 31, 2023 and 52,456,195 shares issued and outstanding as of December 31, 2022	53	52
Additional paid-in capital	497,913	489,760
Accumulated deficit	(391,072)	(413,878)
Accumulated other comprehensive income (loss)	0	0
Total stockholders' equity	106,894	75,934
Total liabilities and stockholders' equity	$ 182,390	$ 124,802