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Note 16 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income tax expense at federal statutory rate | $ 5,383 | $ 6,854 | $ 3,583
State expense (benefit), net of federal income tax effect | 953 | 1,261 | (218)
Federal and state income tax credits | 0 | 0 | (7)
Change in valuation allowance | (181) | (3,564) | (2,618)
Tax windfall on share-based compensation | 0 | 0 | (369)
Bargain purchase gain | 0 | 0 | (4,228)
Nondeductible expenses | 447 | (24) | 427
Foreign rate differential | 78 | 36 | 77
Other | (96) | 175 | 101
Total income tax expense (benefit) | $ 6,584 | $ 4,738 | $ (3,252)
Effective income tax rate | 25.70% | 14.50% | (19.10%)

X
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the tax windfall on stock based compensation. + References No definition available. + Details
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