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Note 15 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income tax expense at federal statutory rate	$ 3,183	$ 5,383	$ 6,854
State expense, net of federal income tax effect	547	953	1,261
Change in valuation allowance	(247)	(181)	(3,564)
Nondeductible expenses	(31)	447	(24)
Foreign rate differential	104	78	36
Other	79	(96)	175
Total income tax expense	$ 3,635	$ 6,584	$ 4,738
Effective income tax rate	24.00%	25.70%	14.50%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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