Discontinued Operations - Consolidated Statement of Operations (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Mar. 01, 2019	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other income (expense):
Income from discontinued operations, net of income taxes				$ 22,697	$ 5,965	$ 8,563
Commercial Product Portfolio | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues				22,615	108,603	127,426
Operating costs and expenses:
Selling, general and administrative				5,801	28,010	19,508
Research and development				2,624	19,799	14,370
Amortization of intangible assets				1,248	28,098	27,647
Restructuring charges - employee severance (Note 13)				3,858	0	0
Total operating costs and expenses				25,538	102,663	108,743
Income (loss) from discontinued operations				(2,923)	5,940	18,683
Other income (expense):
Change in fair value of contingent consideration				(1,478)	1,927	(4,957)
Gain on sale of Commercial Product Portfolio		$ (1,100)	$ (200)	34,568	0	0
Total other income (expense)				33,090	1,927	(4,957)
Income from discontinued operations before income taxes				30,167	7,867	13,726
Provision for income taxes from discontinued operations				(7,470)	(1,902)	(5,163)
Income from discontinued operations, net of income taxes				22,697	5,965	8,563
Proceeds from sale of discontinued operations	$ 158,800
Carrying value of net assets transferred	121,200
Transaction expenses	$ 3,900
Escrow deposits			$ 4,000
Product sales, net | Commercial Product Portfolio | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues				22,325	103,736	115,237
Operating costs and expenses:
Cost of goods and services sold				12,007	26,756	42,859
License fees and service revenue | Commercial Product Portfolio | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues				290	4,867	12,189
Service | Commercial Product Portfolio | Discontinued Operations, Disposed of by Sale
Operating costs and expenses:
Cost of goods and services sold				$ 0	$ 0	$ 4,359