Allowance for Credit Losses - Schedule of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allowance For Credit Loss [Abstract]
Allowance for credit losses, January 1	$ 887	$ 615
Provision for expected credit losses	805	46
Write-offs charged against allowance	(439)	(19)
Foreign currency translation adjustment	14	(47)
Allowance for credit losses, March 31	1,267	595
Accounts receivable balance before allowance for credit losses and provision for sales returns, March 31, 2021 and 2020	$ 30,298	$ 40,057