Business Segment, Geographic, and Concentration Risk Information - Summary of Revenue by Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Total revenue:
Total consolidated revenue	$ 14,873	$ 13,994	$ 4,595	$ 4,581	$ 5,113	$ 5,616	$ 5,193	$ 4,629	$ 38,043	$ 20,551	$ 13,944
Operating Segments
Total revenue:
Total consolidated revenue									47,056	27,579	18,971
Operating Segments | Oncology Innovation Platform
Total revenue:
Total consolidated revenue									1,411	998	973
Operating Segments | Global Supply Chain Platform
Total revenue:
Total consolidated revenue									28,427	26,581	17,998
Operating Segments | Commercial Platform
Total revenue:
Total consolidated revenue									17,218
Intersegment Eliminations
Total revenue:
Total consolidated revenue									$ (9,013)	$ (7,028)	$ (5,027)