Disposition of the Hospital Business - Unaudited Pro Forma Condensed Combined Statement of Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues	$ 0	$ 14,229	$ 22,334	$ 48,220
Total operating expense	13,697	18,376	2,259	64,985
Operating income	(13,697)	(4,147)	20,075	(16,765)
Total income before income taxes	(16,743)	(6,630)	9,048	(26,846)
Cost of products	0	2,823	5,742	9,711
Research and development expenses	5,569	7,539	15,156	25,160
Selling, general and administrative expenses	8,423	5,316	23,431	22,520
Intangible asset amortization	0	205	406	610
Changes in fair value of contingent consideration	(69)	627	3,327	2,384
Other expense - changes in fair value of contingent consideration payable	$ 0	$ 139	435	496
Pro Forma
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues			159	213
Total operating expense			(6,230)	50,587
Operating income			6,389	(50,374)
Total income before income taxes			(4,203)	(59,959)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues			22,334	48,220
Total operating expense			2,259	64,985
Operating income			20,075	(16,765)
Total income before income taxes			9,048	(26,846)
Pro Forma Adjustments | Pro Forma
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues			(22,175)	(48,007)
Total operating expense			(8,489)	(14,398)
Operating income			(13,686)	(33,609)
Total income before income taxes			(13,251)	(33,113)
Pro Forma Adjustments | Pro Forma | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of products			3,540	8,972
Research and development expenses			407	1,604
Selling, general and administrative expenses			809	828
Intangible asset amortization			406	610
Changes in fair value of contingent consideration			3,327	2,384
Other expense - changes in fair value of contingent consideration payable			$ 435	$ 496