Income Taxes - Summary of Supplemental Balance Sheet Information Related to Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets	$ 57,952	$ 55,687
Valuation Allowance	(48,504)	(45,818)
Deferred Tax Assets, net	9,448	9,869
Domestic [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets	46,479	43,791
Valuation Allowance	(46,479)	(43,791)
International [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets	11,473	11,896
Valuation Allowance	(2,025)	(2,027)
Deferred Tax Assets, net	$ 9,448	$ 9,869