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Income Taxes - Reconciliation of U.S. Federal Statutory Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	$ (8,468)	$ (18,473)
State income taxes, net of federal tax benefits	(1,097)	(2,678)
Tax credits	(972)	(1,046)
Stock-based compensation	728	986
Permanent items	9	3
State rate differential	32	274
NOL true-up	2	(337)
Other	566	114
Goodwill impairment	0	11,697
Change in valuation allowance	9,200	9,460
Total provision for income taxes	$ 0	$ 0

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