Business Segment, Geographic, and Concentration Risk Information - Summary of Depreciation, Amortization and Assets by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Total depreciation and amortization:
Total consolidated depreciation and amortization	$ 1,001	$ 909	$ 2,808	$ 2,424
Total assets:
Total consolidated assets	287,595		287,595		$ 231,095
Oncology Innovation Platform
Total depreciation and amortization:
Total consolidated depreciation and amortization	227	174	626	505
Total assets:
Total consolidated assets	174,938		174,938		135,878
Global Supply Chain Platform
Total depreciation and amortization:
Total consolidated depreciation and amortization	376	490	1,012	1,185
Total assets:
Total consolidated assets	65,833		65,833		58,816
Commercial Platform
Total depreciation and amortization:
Total consolidated depreciation and amortization	398	$ 245	1,170	$ 734
Total assets:
Total consolidated assets	$ 46,824		$ 46,824		$ 36,401