Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Statement [Abstract]
Grant revenue	$ 884	$ 1,454
Operating expenses:
Research and development	84,215	41,638
General and administrative	30,233	26,613
Goodwill impairment	0	24,062
Loss on disposal of property and equipment	0	27
Total operating expenses	114,448	92,340
Operating loss	(113,564)	(90,886)
Non-operating income (expense):
Interest income	8,114	10,515
Interest and other expense	(376)	(48)
Other income from a related party (Note 3)	1,400	0
Equity in loss of affiliate	(2)	(8)
Total non-operating income, net	9,136	10,459
Net loss from continuing operations	(104,428)	(80,427)
Net gain (loss) from discontinued operations	514	(949)
Net loss before deferred income tax benefit	(103,914)	(81,376)
Deferred income tax benefit	793	2,097
Net loss	$ (103,121)	$ (79,279)
Basic and diluted loss per share:
Loss from continuing operations, Basic	$ (1.41)	$ (1.22)
Loss from continuing operations, Diluted	(1.41)	(1.22)
Gain (loss) from discontinued operations, Basic	0.01	(0.01)
Gain (loss) from discontinued operations, Diluted	0.01	(0.01)
Basic loss per share	(1.4)	(1.23)
Diluted loss per share	$ (1.4)	$ (1.23)
Weighted average number of common shares used in computing net loss per share, basic and diluted:
Basic	73,813	64,425
Diluted	73,813	64,425
Unrealized gain (loss) on available-for-sale securities	$ 161	$ (51)
Comprehensive loss	$ (102,960)	$ (79,330)