Segment Information (Details)	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)
Segment Information
Number of segments | segment	2
Revenue from external customers	$ 1,589,733	$ 804,356
Segment profit (loss)	(8,303,871)	(5,696,637)
Human Health
Segment Information
Segment profit (loss)	(5,511,092)	(2,899,306)
Animal Health
Segment Information
Segment profit (loss)	(2,792,779)	(2,797,331)
Product revenue, net
Segment Information
Revenue from external customers	1,589,733	626,967
Product revenue, net | Human Health
Segment Information
Revenue from external customers	1,543,121	583,269
Product revenue, net | Animal Health
Segment Information
Revenue from external customers	$ 46,612	$ 43,698