Income Taxes - Summary of Components of Deferred Tax Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Tax credit carryforward	$ 16,236	$ 0
Depreciation and amortization expense	10,722	9,710
Stock-based compensation	10,760	9,383
Accrued employee costs and other expenses	13,264	12,208
Net operating loss carryforwards	2,057	2,042
Unrealized exchange loss	408	391
Deferred rent	4,454	4,782
Others	642	281
Deferred tax assets	58,543	38,797
Valuation allowance	(188)	(188)
Deferred tax assets	58,355	38,609
Deferred tax liabilities:
Unrealized exchange gain	5,840	2,668
Intangible assets	28,119	19,720
Unamortized discount on convertible notes	0	2,753
Others	3,957	6,566
Deferred tax liabilities	37,916	31,707
Net deferred tax assets	$ 20,439	$ 6,902