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Note 16 - Income Taxes - Summary of Components of Income Tax Expense for Continuing Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Federal | $ 958 | $ 174 | $ (117)
State | 1,342 | (16) | 99
Foreign | 243 | 439 | 395
Total current income tax expense | 2,543 | 597 | 377
Federal | 4,380 | 3,597 | (2,954)
State | (386) | 561 | (807)
Foreign | 47 | (17) | 132
Total deferred income tax expense (benefit) | 4,041 | 4,141 | (3,629)
Total income tax expense (benefit) | $ 6,584 | $ 4,738 | $ (3,252)

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