Business Segment, Geographic, and Concentration Risk Information - Summary of Depreciation, Amortization and Assets by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Total depreciation and amortization:
Total consolidated depreciation and amortization	$ 848	$ 335	$ 1,664	$ 752
Total assets:
Total consolidated assets	157,814		157,814		$ 105,890
Operating Segments | Oncology Innovation Platform
Total depreciation and amortization:
Total consolidated depreciation and amortization	120	51	212	98
Total assets:
Total consolidated assets	97,562		97,562		53,022
Operating Segments | Global Supply Chain Platform
Total depreciation and amortization:
Total consolidated depreciation and amortization	495	284	1,021	654
Total assets:
Total consolidated assets	47,052		47,052		48,560
Operating Segments | Commercial Platform
Total depreciation and amortization:
Total consolidated depreciation and amortization	233	$ 0	431	$ 0
Total assets:
Total consolidated assets	$ 13,200		$ 13,200		$ 4,308