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Note 14 - Fair Value - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Total securities available-for-sale | $ 324,181 | $ 277,219
Securities available-for-sale | 324,181 | 277,219
Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 324,181 | 277,219
Securities available-for-sale | 324,181 | 277,219
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale | 26,789 | 9,670
Securities available-for-sale | 26,789 | 9,670
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 296,513 | 266,473
Securities available-for-sale | 296,513 | 266,473
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale | 879 | 1,076
Securities available-for-sale | 879 | 1,076
Money Market Funds [Member] |  |
Total securities available-for-sale | 26,789 | 9,670
Securities available-for-sale | 26,789 | 9,670
Money Market Funds [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 26,789 | 9,670
Securities available-for-sale | 26,789 | 9,670
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale | 26,789 | 9,670
Securities available-for-sale | 26,789 | 9,670
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
US Government-sponsored Enterprises Debt Securities [Member] |  |
Total securities available-for-sale | 4,989 |
Securities available-for-sale | 4,989 |
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 4,989 | 13,058
Securities available-for-sale | 4,989 | 13,058
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale |  | 0
Securities available-for-sale |  | 0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 4,989 | 13,058
Securities available-for-sale | 4,989 | 13,058
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale |  | 0
Securities available-for-sale |  | 0
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] |  |
Total securities available-for-sale | 128,963 | 150,988
Securities available-for-sale | 128,963 | 150,988
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 128,963 | 150,988
Securities available-for-sale | 128,963 | 150,988
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 128,963 | 150,988
Securities available-for-sale | 128,963 | 150,988
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
US States and Political Subdivisions Debt Securities [Member] |  |
Total securities available-for-sale | 162,561 | 102,427
Securities available-for-sale | 162,561 | 102,427
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 162,561 | 102,427
Securities available-for-sale | 162,561 | 102,427
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 162,561 | 102,427
Securities available-for-sale | 162,561 | 102,427
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
Collateralized Debt Obligations [Member] |  |
Total securities available-for-sale | 879 | 1,076
Securities available-for-sale | 879 | 1,076
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 879 | 1,076
Securities available-for-sale | 879 | 1,076
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 0 | 0
Securities available-for-sale | 0 | 0
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale | 879 | 1,076
Securities available-for-sale | $ 879 | $ 1,076

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