Business Segment, Geographic, and Concentration Risk Information - Summary of Revenue by Product Group (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Total revenue by product group:
Total consolidated revenue	$ 18,428	$ 13,994	$ 67,829	$ 23,170
API Sales
Total revenue by product group:
Total consolidated revenue	3,690	5,345	9,538	10,369
Medical Device Sales
Total revenue by product group:
Total consolidated revenue	1,322	562	2,342	1,128
Contract Manufacturing Revenue
Total revenue by product group:
Total consolidated revenue	17	250	412	934
Commercial Product Sales
Total revenue by product group:
Total consolidated revenue	8,280	7,505	25,092	9,547
License Fees
Total revenue by product group:
Total consolidated revenue	5,000		30,000	500
Consulting Revenue
Total revenue by product group:
Total consolidated revenue	96	60	278	256
Grant Revenue
Total revenue by product group:
Total consolidated revenue	$ 23	$ 272	$ 167	$ 436