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Note 13 - Fair Value - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Total securities available-for-sale | $ 261,054 | $ 241,768
Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 261,054 | 241,768
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale | 5,771 | 2,480
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 253,213 | 237,239
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale | 2,070 | 2,049
Money Market Funds [Member] |  |
Total securities available-for-sale | 5,771 | 2,480
Money Market Funds [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 5,771 | 2,480
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale | 5,771 | 2,480
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale |  |
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale |  |
US Treasury Securities [Member] |  |
Total securities available-for-sale |  | 7,894
US Treasury Securities [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale |  |
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale |  |
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale |  |
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale |  |
US Government-sponsored Enterprises Debt Securities [Member] |  |
Total securities available-for-sale | 14,513 |
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 14,513 | 7,894
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale |  |
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 14,513 | 7,894
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale |  |
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] |  |
Total securities available-for-sale | 140,621 | 135,281
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 140,621 | 135,281
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale |  |
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 140,621 | 135,281
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale |  |
US States and Political Subdivisions Debt Securities [Member] |  |
Total securities available-for-sale | 98,079 | 94,064
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 98,079 | 94,064
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale |  |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale | 98,079 | 94,064
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale |  |
Collateralized Debt Obligations [Member] |  |
Total securities available-for-sale | 2,070 | 2,049
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] |  |
Total securities available-for-sale | 2,070 | 2,049
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total securities available-for-sale |  |
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total securities available-for-sale |  |
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total securities available-for-sale | $ 2,070 | $ 2,049

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