Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax assets
Net operating loss carry forwards	$ 48,317	$ 47,204
Research and development expenses	5,100	0
Intangibles	4,907	6,259
Credit carry forwards	3,028	3,027
Nondeductible accruals	453	532
163j Limitation	333	0
Fixed assets	289	84
Equity-based compensation	188	208
Deferred rent	15	33
Other	3	7
Total deferred income taxes - net	62,633	57,354
Deferred income tax liabilities
Prepaid expenses	(92)	(80)
Unrealized translation gain/loss	(21)	(45)
Total deferred income liabilities- net	(113)	(125)
Valuation allowance	(62,698)	(57,346)
Net deferred income tax liabilities	$ (178)	$ (117)