Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 41,249	$ 36,056
Accounts receivable	1,395	3,539
Short-term investments	181,581	243,012
Prepaid expenses and other current assets	6,172	9,302
Total current assets	230,397	291,909
Long-term investments	26,097	27,657
Property and equipment, net	61,097	64,384
Operating lease right-of-use assets	43,814	46,508
Restricted cash	10,227	10,227
Other assets	0	9
Total assets	371,632	440,694
Current liabilities:
Accounts payable	4,040	9,365
Accrued expenses	18,182	21,348
CIRM award liability, current portion	795	0
Deferred revenue	0	393
Operating lease liabilities, current portion	5,656	7,416
Total current liabilities	28,673	38,522
CIRM award liability, net of current portion	5,600	5,070
Operating lease liabilities, net of current portion	75,675	77,849
Stock price appreciation milestones	320	527
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; authorized shares - 5,000,000 at June 30, 2025 and December 31, 2024; Class A Convertible Preferred shares issued and outstanding - 2,755,086 at June 30, 2025 and December 31, 2024	3	3
Common stock, $0.001 par value; authorized shares - 350,000,000 at June 30, 2025 and 250,000,000 at December 31, 2024; issued and outstanding - 114,655,067 at June 30, 2025 and 113,928,279 at December 31, 2024	115	114
Additional paid-in capital	1,730,869	1,716,335
Accumulated other comprehensive income	62	268
Accumulated deficit	(1,469,685)	(1,397,994)
Total stockholders’ equity	261,364	318,726
Total liabilities and stockholders’ equity	$ 371,632	$ 440,694