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Income Taxes - Tax Effects of Temporary Differences that Give Rise to Significant Portion of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets (liabilities):
Reserves and allowances		$ 6,161	$ 5,521
Accrued expenses		8,103	8,977
Net operating losses		142,708	58,813
Research and development tax credit		53,472	30,138
Stock-based compensation		16,621	13,584
Prepaid expenses		(1,674)	(1,365)
Property and equipment		(21,924)	(14,375)
Intangibles	[1]	219,492	184,965
Capitalized software development costs		(3,565)	(2,836)
Operating lease assets		(46,435)	(55,685)
Operating lease liabilities		56,415	64,359
Other		484	487
Valuation allowance		(361,614)	(242,415)
Total deferred tax assets, net		$ 68,244	$ 50,168
[1] As of December 31, 2021 and 2020, includes intangibles associated with our international restructuring, net of amortization, offset by a reserve for uncertain tax position. See discussion below.

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