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Note 15 - Income Taxes - Summary of Components of Income Tax Expense for Continuing Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Federal $ 2,256 $ 958 $ 174
State 1,064 1,342 (16)
Foreign 213 243 439
Total current income tax expense 3,533 2,543 597
Federal 573 4,380 3,597
State (464) (386) 561
Foreign (7) 47 (17)
Total deferred income tax expense 102 4,041 4,141
Total income tax expense $ 3,635 $ 6,584 $ 4,738