Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred income tax assets
Net operating loss carry forwards	$ 41,561	$ 48,317
Research and development expenses	6,953	5,100
Intangibles	4,643	4,907
Credit carry forwards	2,479	3,028
Nondeductible accruals	405	453
163j limitation	87	333
Fixed assets	346	289
Equity-based compensation	404	188
Deferred rent	12	15
State taxes	1,515	3
Total deferred income tax assets - net	58,405	62,633
Deferred income tax liabilities
Prepaid expenses	(82)	(92)
Unrealized translation gain/loss	(6)	(21)
Total deferred income tax liabilities - net	(88)	(113)
Valuation allowance	(58,485)	(62,698)
Net deferred income tax liabilities	$ (168)	$ (178)