Revenue Recognition - Summary of Accounts Receivable and Contract Assets Balances by Reportable Segments (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts Receivable By Reportable Segments [Line Items]
Accounts receivable, gross	$ 46,935	$ 45,792
Chargebacks and other deductions	(17,264)	(12,552)
Provision for credit losses	(9,482)	(9,637)
Accounts receivable, net	20,189	23,603
Oncology Innovation Platform
Accounts Receivable By Reportable Segments [Line Items]
Accounts receivable, gross	9,167	10,783
Provision for credit losses	(8,919)	(8,919)
Accounts receivable, net	248	1,864
Global Supply Chain Platform
Accounts Receivable By Reportable Segments [Line Items]
Accounts receivable, gross	3,589	4,074
Chargebacks and other deductions		(1)
Provision for credit losses	(138)	(164)
Accounts receivable, net	3,451	3,909
Commercial Platform
Accounts Receivable By Reportable Segments [Line Items]
Accounts receivable, gross	34,179	30,935
Chargebacks and other deductions	(17,264)	(12,551)
Provision for credit losses	(425)	(554)
Accounts receivable, net	$ 16,490	$ 17,830