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Note 6 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 6 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than Twelve Months, Fair Value	$ 32,143	$ 2,406
Less than Twelve Months, Gross Unrealized Losses	(675)	(10)
Twelve Months or Greater, Fair Value	31,682	50,740
Twelve Months or Greater, Gross Unrealized Losses	(1,425)	(1,227)
Total, Fair Value	63,825	53,146
Total, Gross Unrealized Losses	(2,100)	(1,237)
US Government Agencies Debt Securities [Member]
Note 6 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than Twelve Months, Fair Value	2,745
Less than Twelve Months, Gross Unrealized Losses	(79)
Twelve Months or Greater, Fair Value	12,791	15,734
Twelve Months or Greater, Gross Unrealized Losses	(378)	(450)
Total, Fair Value	15,536	15,734
Total, Gross Unrealized Losses	(457)	(450)
US States and Political Subdivisions Debt Securities [Member]
Note 6 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than Twelve Months, Fair Value	19,988	2,406
Less than Twelve Months, Gross Unrealized Losses	(457)	(10)
Twelve Months or Greater, Fair Value	11,586	18,232
Twelve Months or Greater, Gross Unrealized Losses	(851)	(543)
Total, Fair Value	31,574	20,638
Total, Gross Unrealized Losses	(1,308)	(553)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 6 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than Twelve Months, Fair Value	9,410
Less than Twelve Months, Gross Unrealized Losses	(139)
Twelve Months or Greater, Fair Value	7,305	16,774
Twelve Months or Greater, Gross Unrealized Losses	(196)	(234)
Total, Fair Value	16,715	16,774
Total, Gross Unrealized Losses	$ (335)	$ (234)

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