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Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
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Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | $ 145,146 | $ 154,334
Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 145,146 | 154,334
US Government Agencies Debt Securities [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 22,018 | 22,896
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 22,018 | 22,896
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 94,173 | 98,345
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 25,669 | 29,391
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 25,669 | 29,391
Mortgage-backed Securities, Issued by Private Enterprises [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 2,387 | 2,919
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 2,387 | 2,919
Debt Securities [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 144,247 | 153,551
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 144,247 | 153,551
Equity Securities in Financial Institutions [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 899 | 783
Equity Securities in Financial Institutions [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 899 | 783
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 5 | 5
Fair Value, Inputs, Level 1 [Member] | Equity Securities in Financial Institutions [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 5 | 5
Fair Value, Inputs, Level 2 [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 145,146 | 154,334
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 145,141 | 154,329
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 22,018 | 22,896
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 94,173 | 98,345
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 25,669 | 29,391
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 2,387 | 2,919
Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | 144,247 | 153,551
Fair Value, Inputs, Level 2 [Member] | Equity Securities in Financial Institutions [Member] | Fair Value, Measurements, Recurring [Member] |  |
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Recurring Basis [Line Items] |  |
Investment securities available for sale, at fair value | $ 894 | $ 778

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