Revenue Recognition - Summary of Accounts Receivable and Contract Assets Balances by Reportable Segments (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts Receivable And Contract Asset Balances By Reportable Segments [Line Items]
Accounts receivable, gross	$ 66,406	$ 31,207
Chargebacks and other deductions	(14,858)	(14,394)
Provision for credit losses	(130)	(124)
Accounts receivable, net	51,418	16,689
Oncology Innovation Platform
Accounts Receivable And Contract Asset Balances By Reportable Segments [Line Items]
Accounts receivable, gross	30,110	49
Accounts receivable, net	30,110	49
Global Supply Chain Platform
Accounts Receivable And Contract Asset Balances By Reportable Segments [Line Items]
Accounts receivable, gross	1,505	1,522
Chargebacks and other deductions	(1)	(1)
Provision for credit losses	(116)	(114)
Accounts receivable, net	1,388	1,407
Commercial Platform
Accounts Receivable And Contract Asset Balances By Reportable Segments [Line Items]
Accounts receivable, gross	34,791	29,636
Chargebacks and other deductions	(14,857)	(14,393)
Provision for credit losses	(14)	(10)
Accounts receivable, net	$ 19,920	$ 15,233