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Note 8 - Income Taxes (Restated) (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Income Tax Expense (Benefit), Total | $ 1,780 | $ 2,140 | $ 3,690 | $ 7,090
Effective Income Tax Rate Reconciliation, Percent, Total | 17.80% | 17.70% | 12.80% | 19.90%
Effective Income Tax Rate Reconciliation, Reversal of Deferred Tax Liability From Termination of Defined Benefit Plan, Amount |  |  | $ 1,800 |
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount | $ (800) |  | (800) |
Income Tax Expense Related to Termination of Defined Benefit Plan | $ (600) |  | $ (600) |

X
- 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 reversal of deferred tax liability from termination of defined benefit plan. + References No definition available. + Details
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