Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 44,771	$ 33,021
Marketable securities	262,509	380,376
Prepaid expenses and other current assets	11,898	11,420
Total current assets	319,178	424,817
Property and equipment, net	13,914	17,145
Operating lease right-of-use assets	16,990	19,951
Restricted cash	1,846	1,846
Other assets	4,494	4,544
Total assets	356,422	468,303
Current liabilities:
Accounts payable	2,217	2,215
Accrued clinical supply costs	5,150	6,989
Accrued liabilities	14,215	28,890
Deferred revenue, current portion	13,402	23,663
Payable to collaboration partner	6,607	5,914
Refund liability to collaboration partner, current portion	33,859	48,634
Operating lease liabilities, current portion	8,904	8,754
Total current liabilities	84,354	125,059
Deferred revenue, long-term portion	168,870	172,169
Long-term debt	9,536	9,389
Refund liability to collaboration partner, long-term portion	0	9,276
Operating lease liabilities, long-term portion	21,043	24,376
Other long-term liabilities	1,444	1,234
Total liabilities	285,247	341,503
Commitments and contingencies (Note 4)
Stockholders' equity:
Common stock, $0.0001 par value; 200,000,000 shares authorized; 101,212, 329 and 99,085,888 shares issued and outstanding as of June 30, 2025 and December 31, 2024, respectively	9	9
Additional paid-in capital	971,192	955,657
Accumulated other comprehensive income	96	261
Accumulated deficit	(900,122)	(829,127)
Total stockholders' equity	71,175	126,800
Total liabilities and stockholders’ equity	$ 356,422	$ 468,303