UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 759	$ 0	$ 2,763	$ 0
Cost of revenues	806	0	2,667	0
Gross (loss) profit	(47)	0	96	0
Operating expenses
Research and development	10,136	9,462	32,503	25,741
Selling, general and administrative	5,184	5,648	17,228	18,502
Exit and termination (benefits) costs	(70)	(929)	1,007	2,946
Total operating expenses	15,250	14,181	50,738	47,189
Loss from operations	(15,297)	(14,181)	(50,642)	(47,189)
Interest income	1,960	2,979	6,637	9,504
Gain on disposal of assets	0	0	0	3
Other income, net	0	0	0	32
Net loss	$ (13,337)	$ (11,202)	$ (44,005)	$ (37,650)
Net loss per share, basic (in USD per share)	$ (0.08)	$ (0.06)	$ (0.25)	$ (0.21)
Net loss per share, diluted (in USD per share)	$ (0.08)	$ (0.06)	$ (0.25)	$ (0.21)
Weighted-average shares outstanding, basic (in shares)	175,652,193	173,612,768	175,106,583	175,302,069
Weighted-average shares outstanding, diluted (in shares)	175,652,193	173,612,768	175,106,583	175,302,069
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Research and development services		Research and development services	Research and development services
Government Contract
Operating expenses
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]		Research and development services
Research and development services
Cost of revenues	$ 806	$ 0	$ 2,667	$ 0