Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating Expenses
Impairment of goodwill			$ 3,907	$ 1,630
Impairment of other noncurrent assets			0	32,915
Other Income (Expense), Net
Income tax (expense) benefit	$ (3)	$ 1,689	(3)	1,718
Net loss	$ (26,642)	$ (58,792)	$ (80,795)	$ (82,530)
Net loss per share
Net loss per share, basic (in dollars per share)	$ (0.09)	$ (0.23)	$ (0.27)	$ (0.33)
Net loss per share, diluted (in dollars per share)	$ (0.09)	$ (0.23)	$ (0.27)	$ (0.33)
Weighted average shares outstanding, basic (in shares)	296,434,726	252,366,533	295,164,303	250,803,790
Weighted average shares outstanding, diluted (in shares)	296,434,726	252,366,533	295,164,303	250,803,790
Continuing Operations
Revenues
Total revenues	$ 856	$ 717	$ 2,197	$ 1,782
Operating Expenses
Research and development	11,488	15,693	21,966	29,942
Selling, general and administrative	16,133	10,306	28,492	20,457
Impairment of goodwill	3,907	1,630	3,907	1,630
Impairment of other noncurrent assets	0	32,915	0	32,915
Total operating expenses	32,620	61,558	56,557	87,033
Operating loss	(31,764)	(60,841)	(54,360)	(85,251)
Other Income (Expense), Net
Change in fair value of warrant liabilities	4,460	0	(28,021)	0
Interest expense	0	(2)	(1)	(4)
Interest income	696	319	1,614	927
Other (expense) income, net	(31)	43	(24)	80
Total other (expense) income, net	5,125	360	(26,432)	1,003
Loss before income taxes	(26,639)	(60,481)	(80,792)	(84,248)
Income tax (expense) benefit	(3)	1,689	(3)	1,718
Product revenues | Continuing Operations
Revenues
Total revenues	41	31	244	169
Service revenues | Continuing Operations
Revenues
Total revenues	781	673	1,896	1,592
Operating Expenses
Cost of products and services	1,092	1,014	2,192	2,089
Other revenues | Continuing Operations
Revenues
Total revenues	$ 34	$ 13	$ 57	$ 21