Income Taxes Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss and capital loss carryforwards	$ 18,182	$ 25,410
Reserves and accruals	39,264	24,769
Stock-based compensation	8,416	8,571
Deferred revenue	20,909	14,285
Net translation losses	1,589	1,158
Credit carryforwards	1,801	115
Total deferred tax assets, gross	90,161	74,308
Deferred tax liabilities:
Depreciation and amortization	23,817	8,320
Others	0	612
Prepaid expenses	1,341	902
Total deferred tax liabilities, gross	25,158	9,834
Net deferred tax assets before valuation allowance	65,003	64,474
Valuation allowance	(1,086)	(251)
Net deferred tax assets	$ 63,917	$ 64,223