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Note 4 - Fair Value Measurements (Details) - Assets Measured on a Nonrecurring Basis - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Nonrecurring Basis [Line Items]
Impaired loans	$ 11,902	$ 14,368
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Nonrecurring [Member]
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Nonrecurring Basis [Line Items]
Impaired loans	11,277	12,772
Other real estate owned	2,006	2,590
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Note 4 - Fair Value Measurements (Details) - Assets Measured on a Nonrecurring Basis [Line Items]
Impaired loans	11,277	12,772
Other real estate owned	$ 2,006	$ 2,590

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

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