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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
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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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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