CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 71,396	$ 182,476
Prepaid expenses	2,493	6,777
Other current assets	15,626	14,667
Total current assets	231,406	211,886
Property and equipment, net	22,046	24,404
Operating lease right-of-use assets	117,869	47,156
Restricted cash	13,691	14,062
Total assets	385,012	297,508
Current liabilities:
Accounts payable	9,354	11,351
Accrued expenses and other current liabilities	11,000	15,904
Deferred revenue — related party	6,951	7,092
Operating lease liability	7,714	3,614
Total current liabilities	35,019	37,961
Deferred revenue, net of current — related party	59,751	63,218
Operating lease liability, net of current	110,421	37,180
Research and development funding liability	18,000	6,000
Total liabilities	223,191	144,359
Commitments and contingencies
Stockholders’ equity
Common stock, par value of $0.00001 per share; 775,000,000 shares authorized; 180,309,471 and 131,160,842 shares issued and outstanding as of September 30, 2025 and December 31, 2024, respectively	2	2
Additional paid-in capital	1,004,061	840,358
Accumulated other comprehensive loss	33	1
Accumulated deficit	(842,275)	(687,212)
Total stockholders’ equity	161,821	153,149
Total liabilities and stockholders’ equity	385,012	297,508
Nonrelated Party
Current assets:
Short-term investments	137,030	2,998
Related Party
Current assets:
Short-term investments	$ 4,861	$ 4,968