Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues
Total revenues	$ 32,021	$ 24,511
Operating Expenses
Impairment of goodwill	482	0
Other Expense, Net
Equity in net loss of affiliates	(1)	(3)
Loss from continuing operations before income taxes	(19,309)	(21,896)
Income from discontinued operations, net of income taxes	0	4,526
Net loss	$ (19,251)	$ (17,318)
Net Loss per Share
Net loss from continuing operations per share, basic (in dollars per share)	$ (0.10)	$ (0.11)
Net loss from continuing operating per share, diluted (in dollars per share)	(0.10)	(0.11)
Net income (loss) from discontinued operations per share, diluted (in dollars per share)	0	0.02
Net income (loss) from discontinued operations per share, basic (in dollars per share)	0	0.02
Net loss per share, basic (in dollars per share)	(0.10)	(0.09)
Net loss per share, diluted (in dollars per share)	$ (0.10)	$ (0.09)
Weighted average shares outstanding, basic (in shares)	199,629,218	193,499,546
Weighted average shares outstanding, diluted (in shares)	199,629,218	193,499,546
Collaboration and licensing agreements
Revenues
Total revenues	$ 0	$ 66
Continuing Operations
Revenues
Total revenues	32,021	24,511
Operating Expenses
Research and development	12,760	10,521
Selling, general and administrative	19,576	18,702
Impairment of goodwill	482	0
Total operating expenses	49,917	42,199
Operating loss	(17,896)	(17,688)
Other Expense, Net
Interest expense	(2,069)	(4,539)
Interest income	434	392
Other income (expense), net	223	(58)
Total other expense, net	(1,412)	(4,205)
Equity in net loss of affiliates	(1)	(3)
Loss from continuing operations before income taxes	(19,309)	(21,896)
Income tax benefit	58	52
Loss from continuing operations	(19,251)	(21,844)
Continuing Operations | Collaboration and licensing agreements
Revenues
Total revenues	0	66
Continuing Operations | Products
Revenues
Total revenues	8,724	6,381
Operating Expenses
Cost of products and services	7,510	5,574
Continuing Operations | Services
Revenues
Total revenues	23,209	17,931
Operating Expenses
Cost of products and services	9,589	7,402
Continuing Operations | Other
Revenues
Total revenues	$ 88	$ 133