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Income Taxes - Schedule of Temporary Differences Between Basis of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 76,802	$ 61,181
Tax credit carryforwards	7,248	5,748
Accrued expenses	181	126
Property and equipment	591	279
Lease liabilities	5,618	6,230
Equity compensation	2,396	2,200
Amortizable intangibles	1,197	1,195
Other	238	74
Gross deferred tax assets	94,271	77,033
Deferred tax liabilities:
Right of use assets	(3,794)	(4,242)
Gross deferred tax liabilities	(3,794)	(4,242)
Valuation allowance	$ (90,477)	$ (72,791)	$ (53,834)

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