Segment Information (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Information
Number of reportable segments \| segment	2
Revenue from external customers	$ 869	$ 1,590
Segment net loss	(7,936)	(8,304)
Segment assets	33,276		$ 36,410
Less: investment in subsidiary	(29,241)		(29,241)
Less: Intercompany loan	(36,607)		(34,950)
Human Health
Segment Information
Segment net loss	(3,200)	(5,512)
Segment assets	30,743		32,432
Animal Health
Segment Information
Segment net loss	(4,736)	(2,792)
Segment assets	68,381		68,169
Product revenue, net
Segment Information
Revenue from external customers	869	1,590
Product revenue, net \| Human Health
Segment Information
Revenue from external customers	835	1,543
Product revenue, net \| Animal Health
Segment Information
Revenue from external customers	34	$ 47
Operating Segments
Segment Information
Segment assets	$ 99,124		$ 100,601

For an unclassified balance sheet, the amount of loan receivable.

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