Segment Data (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)
Segment Information
Number of reportable segments | segment	2
Revenue from external customers	$ 9,385	$ 5,775
Segment net loss	(33,809)	(38,539)
Segment assets	42,843	36,410
Human Health
Segment Information
Segment net loss	(9,779)	(19,263)
Animal Health
Segment Information
Segment net loss	(24,030)	(19,276)
Product revenue, net
Segment Information
Revenue from external customers	9,385	5,775
Product revenue, net | Human Health
Segment Information
Revenue from external customers	9,309	5,673
Product revenue, net | Animal Health
Segment Information
Revenue from external customers	76	102
Operating Segments
Segment Information
Segment assets	113,961	100,601
Operating Segments | Human Health
Segment Information
Segment assets	34,201	32,432
Operating Segments | Animal Health
Segment Information
Segment assets	79,760	68,169
Segment Reconciling Items
Segment Information
Segment assets	42,843	36,410
Less: investment in subsidiary	(29,241)	(29,241)
Less: Intercompany loan	$ (41,877)	$ (34,950)