Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Unrecognized tax benefits	$ 412,000	$ 412,000	$ 412,000
Interest and penalties	0	0
Cumulative interest and penalties	0	0
Valuation allowance	58,485,000	62,698,000
Increase (decrease) in valuation allowance of deferred tax assets	(4,200,000)	5,400,000
Income before provision for income taxes for foreign subsidiaries	126,000	486,000
Income related to GILTI	2,000,000
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	189,500,000	189,500,000
Tax credit carryforwards	2,500,000	2,500,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	136,200,000	136,200,000
Tax credit carryforwards	$ 700,000	$ 700,000