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Note 22 - Qualified Affordable Housing Project Investment (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Tax Credits and Other Tax Benefits | $ 468,000 | $ 497,000
Income Tax Expense (Benefit) [Member] |  |
Investment Amortization | 338,000 | 361,000
Other Assets [Member] |  |
Investments, Total | 2,900,000 | 3,200,000
Other Liabilities [Member] |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | $ 496,000 | $ 1,900,000

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