Segment Data (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Information
Number of reportable segments | segment			2
Net loss	$ (7,904)	$ (12,609)	$ (32,592)	$ (40,163)
Segment assets	45,380		45,380		$ 47,449
Human Health
Segment Information
Net loss	(6,228)	(6,360)	(17,345)	(15,956)
Animal Health
Segment Information
Net loss	(1,676)	(6,249)	(15,247)	(24,207)
Product revenue
Segment Information
Revenue from external customers	2,813	3,150	7,461	8,696
Product revenue | Human Health
Segment Information
Revenue from external customers	2,782	3,133	7,335	8,513
Product revenue | Animal Health
Segment Information
Revenue from external customers	31	$ 17	126	$ 183
Operating Segments
Segment Information
Segment assets	183,209		183,209		169,502
Operating Segments | Human Health
Segment Information
Segment assets	39,239		39,239		40,896
Operating Segments | Animal Health
Segment Information
Segment assets	143,970		143,970		128,606
Segment Reconciling Items
Segment Information
Segment assets	(29,232)		(29,232)		(29,232)
Intersegment Eliminations
Segment Information
Segment assets	$ (108,597)		$ (108,597)		$ (92,821)