Note 7 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Computed income tax (expense) benefit at statutory rate	$ (1,122)	$ 789
Permanent and other deductions, net	419	51
Goodwill impairment	0	(120)
Global intangible low-taxed income	(204)	(113)
Foreign income taxes	156	10
State income taxes, net of federal benefit	(119)	120
Deferred tax effects	55	(153)
Valuation allowance	(8)	(1,486)
Income tax expense	$ (823)	$ (902)
Effective tax rate	15.40%	(22.30%)