Note 7 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Computed income tax expense at statutory rate	$ (540)	$ (1,122)
Permanent and other deductions, net	(12)	419
Global intangible low-taxed income	(80)	(204)
Foreign income taxes	196	156
State income taxes, net of federal benefit	(104)	(119)
Deferred tax effects	0	55
Valuation allowance	1,494	(8)
Benefit (provision) for income taxes, net	$ 954	$ (823)
Effective tax rate	(34.90%)	15.40%