Significant Accounting Policies - Summary of Impact of Accounts Receivable Reserves on Gross Trade Accounts Receivable Balances (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross trade accounts receivable	$ 189,580	$ 149,567
Accounts receivable, net	158,288	116,430
Trade Allowances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Valuation allowances and reserves	(23,982)	(29,261)
Chargebacks
Accounts, Notes, Loans and Financing Receivable [Line Items]
Valuation allowances and reserves	(6,365)	$ (3,876)
Allowance for Doubtful Accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Valuation allowances and reserves	$ (945)