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Note 2 - Securities (Details Textual) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2019 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Weighted Average Re-pricing Term (Year) |  | 3 years 6 months | 3 years 8 months 12 days
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale, Total |  | $ 34,057 | $ 22,031
Debt Securities, Available-for-sale, Realized Gain |  | 40 | 1
Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities |  | 3,300 | 2,200
Proceeds from Sale of Held-to-maturity Securities |  | 0 | 0
Debt Securities, Held-to-maturity, Fair Value, Total |  | 14,743 | 17,646
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax |  | 0 | (431)
Debt Securities, Available-for-sale, Restricted |  | 66,500 | 40,500
Impairment Losses Related to Federal Home Loan Stock |  | 0 |
Other Assets [Member] |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  | $ 529 | $ 514
Accounting Standards Update 2017-12 [Member] |  |  |
Debt Securities, Held-to-maturity, Fair Value, Total | $ (23,000) |  |
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax | $ 431 |  |
US Agency and Mortgage-backed Securities [Member] |  |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions |  | 7 | 42
Available-for-Sale Securities, Number of Securities |  | 100 | 94
Debt Securities, Held-to-maturity, Fair Value, Total |  | $ 9,852 | $ 12,454
Municipal Bonds [Member] |  |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions |  | 1 | 3
Available-for-Sale Securities, Number of Securities |  | 84 | 79
Debt Securities, Held-to-maturity, Fair Value, Total |  | $ 3,286 | $ 3,680

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