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Note 21 - Fair Value of Financial Instruments - Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investment securities available-for-sale, at fair value	$ 153,871	$ 181,910
Fair Value, Measurements, Recurring [Member] | Other Assets [Member]
Other assets – derivatives	443	346
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]
Other assets – derivatives
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Assets [Member]
Other assets – derivatives	443	346
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Assets [Member]
Other assets – derivatives
Residential Mortgage Backed Securities [Member]
Investment securities available-for-sale, at fair value	82,786	98,409
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available-for-sale, at fair value	82,786	98,409
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available-for-sale, at fair value
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available-for-sale, at fair value	82,786	98,409
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available-for-sale, at fair value
Commercial Mortgage Backed Securities [Member]
Investment securities available-for-sale, at fair value	66,074	70,530
Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available-for-sale, at fair value	66,074	70,530
Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available-for-sale, at fair value
Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available-for-sale, at fair value	66,074	70,530
Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available-for-sale, at fair value
US States and Political Subdivisions Debt Securities [Member]
Investment securities available-for-sale, at fair value	4,931	10,142
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available-for-sale, at fair value	4,931	10,142
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available-for-sale, at fair value
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available-for-sale, at fair value	4,931	10,142
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available-for-sale, at fair value
US Treasury Securities [Member]
Investment securities available-for-sale, at fair value	80	80
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available-for-sale, at fair value	80	80
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available-for-sale, at fair value
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available-for-sale, at fair value	80	80
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available-for-sale, at fair value
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available-for-sale, at fair value		1,993
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available-for-sale, at fair value
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available-for-sale, at fair value		1,993
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available-for-sale, at fair value
Corporate Debt Securities [Member]
Investment securities available-for-sale, at fair value		756
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available-for-sale, at fair value		756
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available-for-sale, at fair value
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available-for-sale, at fair value		756
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available-for-sale, at fair value

X

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
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-Section 50
-Paragraph 2
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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