Note 6 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Computed income tax expense at statutory rate	$ (187)	$ (540)
Permanent and other deductions, net	55	(12)
Global intangible low-taxed income	0	(80)
Foreign income taxes	(61)	196
State income taxes, net of federal benefit	(46)	(104)
Deferred tax effects	(19)	0
Valuation allowance	0	1,494
(Provision) benefit for income taxes, net	$ (258)	$ 954
Effective tax rate	37.30%	(34.90%)