Income Tax Provision Reconciled to Amount Computed by Applying Statutory Federal Tax Rate to Income (Loss) Before Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Income tax provision (benefit) at statutory federal tax rate of 21%	$ (61)	$ 345	$ (1,057)
State taxes, net of federal benefit	2	(19)	(12)
Foreign taxes provisions provided for at rates other than U.S statutory rate	(410)	(494)	(202)
Section 951(A) inclusion	428	523
Stock options	(218)	(443)
Change in valuation allowance	274	700	1,432
Permanent differences	86	42	(76)
PPP loan forgiveness		(619)
Other		(7)	(12)
Total income tax provision	$ 101	$ 28	$ 73