Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Expenses
Impairment of goodwill			$ 0	$ 482
Impairment of other noncurrent assets			0	638
Other income (Expense), Net
Equity in net income (loss) of affiliates			0	861
Loss from continuing operations before income taxes	$ (19,801)	$ (7,694)	(62,974)	(57,798)
Income tax benefit	6	50	126	197
Income from discontinued operations, net of income taxes	0	95,023	0	108,094
Net (loss) income	$ (19,795)	$ 87,379	$ (62,848)	$ 50,493
Net (loss) income per share
Net loss from continuing operations per share, basic (in dollars per share)	$ (0.08)	$ (0.04)	$ (0.26)	$ (0.29)
Net loss from continuing operating per share, diluted (in dollars per share)	(0.08)	(0.04)	(0.26)	(0.29)
Net income from discontinued operations per share, diluted (in dollars per share)	0	0.48	0	0.54
Net income from discontinued operations per share, basic (in dollars per share)	0	0.48	0	0.54
Net (loss) income per share, basic (in dollars per share)	(0.08)	0.44	(0.26)	0.25
Net (loss) income per share, diluted (in dollars per share)	$ (0.08)	$ 0.44	$ (0.26)	$ 0.25
Weighted average shares outstanding, basic (in shares)	248,520,724	200,670,590	243,075,262	200,256,046
Weighted average shares outstanding, diluted (in shares)	248,520,724	200,670,590	243,075,262	200,256,046
Continuing Operations
Revenues
Total revenues	$ 1,379	$ 16,722	$ 4,997	$ 25,146
Operating Expenses
Research and development	11,583	12,622	35,620	36,377
Selling, general and administrative	9,196	10,137	30,150	36,496
Impairment of goodwill	0	0	0	482
Impairment of other noncurrent assets	0	0	0	638
Total operating expenses	22,316	24,336	70,531	79,075
Operating loss	(20,937)	(7,614)	(65,534)	(53,929)
Other income (Expense), Net
Interest expense	(1)	(2,036)	(461)	(6,137)
Interest income	856	56	2,316	131
Other income, net	281	1,038	705	1,276
Total other income (expense), net	1,136	(942)	2,560	(4,730)
Equity in net income (loss) of affiliates	0	862	0	861
Loss from continuing operations before income taxes	(19,801)	(7,694)	(62,974)	(57,798)
Income tax benefit	6	50	126	197
Loss from continuing operations	(19,795)	(7,644)	(62,848)	(57,601)
Continuing Operations | Collaboration and licensing revenues
Revenues
Total revenues	0	14,561	0	14,561
Continuing Operations | Product revenues
Revenues
Total revenues	82	342	730	1,455
Continuing Operations | Service revenues
Revenues
Total revenues	1,296	1,750	4,261	8,896
Operating Expenses
Cost of products and services	1,537	1,577	4,761	5,082
Continuing Operations | Other revenues
Revenues
Total revenues	$ 1	$ 69	$ 6	$ 234