Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Total revenues	$ 21,561	$ 23,583	$ 79,652	$ 83,845
Operating Expenses
Impairment of other noncurrent assets			543	13,326
Other Expense, Net
Equity in net loss of affiliates			(3)	(1,163)
Loss from continuing operations before income taxes	(29,885)	(27,586)	(71,904)	(64,221)
Income (loss) from discontinued operations, net of income taxes	60	(1,972)	4,599	(64,769)
Net loss	$ (29,764)	$ (29,508)	$ (67,132)	$ (128,860)
Net Loss per Share
Net loss from continuing operations per share, basic (in dollars per share)	$ (0.15)	$ (0.17)	$ (0.36)	$ (0.39)
Net loss from continuing operating per share, diluted (in dollars per share)	(0.15)	(0.17)	(0.36)	(0.39)
Net income (loss) from discontinued operations per share, diluted (in dollars per share)	0	(0.01)	0.02	(0.40)
Net income (loss) from discontinued operations per share, basic (in dollars per share)	0	(0.01)	0.02	(0.40)
Net loss per share, basic (in dollars per share)	(0.15)	(0.18)	(0.34)	(0.79)
Net loss per share, diluted (in dollars per share)	$ (0.15)	$ (0.18)	$ (0.34)	$ (0.79)
Weighted average shares outstanding, basic (in shares)	199,179,963	165,527,024	197,254,438	163,318,375
Weighted average shares outstanding, diluted (in shares)	199,179,963	165,527,024	197,254,438	163,318,375
Collaboration and licensing agreements
Revenues
Total revenues	$ 22	$ 5,223	$ 389	$ 20,259
Continuing Operations
Revenues
Total revenues	21,561	23,583	79,652	83,845
Operating Expenses
Research and development	12,920	10,172	37,122	30,973
Selling, general and administrative	18,660	22,310	57,359	61,665
Impairment of other noncurrent assets	0	920	543	920
Total operating expenses	47,030	46,589	138,483	135,281
Operating loss	(25,469)	(23,006)	(58,831)	(51,436)
Other Expense, Net
Interest expense	(4,799)	(4,646)	(14,005)	(13,830)
Interest income	503	579	1,305	2,025
Other income (expense), net	(120)	10	(370)	145
Total other expense, net	(4,416)	(4,057)	(13,070)	(11,660)
Equity in net loss of affiliates	0	(523)	(3)	(1,125)
Loss from continuing operations before income taxes	(29,885)	(27,586)	(71,904)	(64,221)
Income tax benefit	61	50	173	130
Loss from continuing operations	(29,824)	(27,536)	(71,731)	(64,091)
Continuing Operations | Collaboration and licensing agreements
Revenues
Total revenues	22	5,223	389	20,259
Continuing Operations | Products
Revenues
Total revenues	7,297	6,896	22,013	20,397
Operating Expenses
Cost of products and services	7,492	7,296	19,201	21,526
Continuing Operations | Services
Revenues
Total revenues	14,117	11,288	56,851	42,615
Operating Expenses
Cost of products and services	7,958	5,891	24,258	20,197
Continuing Operations | Other
Revenues
Total revenues	$ 125	$ 176	$ 399	$ 574