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Note 19 - Out-of-Period Adjustment (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Deferred Tax Expense from Stock Options Exercised |  |  | $ 291,000
Retained Earnings (Accumulated Deficit), Ending Balance | $ 62,488,000 | $ 58,986,000 |
Income Tax Expense (Benefit), Total | $ 1,744,000 | $ 5,360,000 |
Earnings Per Share, Basic, Total (in dollars per share) | $ 0.51 | $ 2.00 |
Earnings Per Share, Diluted, Total (in dollars per share) | $ 0.50 | $ 1.92 |
Revision of Prior Period, Error Correction, Adjustment [Member] |  |  |
Retained Earnings (Accumulated Deficit), Ending Balance | $ (291,000) | $ (489,000) |
Income Tax Expense (Benefit), Total | 198,000 |  |
Accrued Liabilities, Total |  | 198,000 |
Deferred Tax Liabilities, Gross, Total |  | $ 279,000 |
Earnings Per Share, Basic, Total (in dollars per share) |  | $ (1) |
Earnings Per Share, Diluted, Total (in dollars per share) |  | $ (2) |
Revision of Prior Period, Error Correction, Adjustment [Member] | Error Correction for Taxes Corrected in Retained Earnings [Member] |  |  |
Current State and Local Tax Expense (Benefit) | 12,000 |  |
Revision of Prior Period, Error Correction, Adjustment [Member] | Error Correction for Taxes Corrected in Provision for Income Tax [Member] |  |  |
Deferred Tax Expense from Stock Options Exercised | 44,000 |  |
Current State and Local Tax Expense (Benefit) | $ 154,000 |  |

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