Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than Twelve Months, Fair Value	$ 10,586	$ 59,255
Less than Twelve Months, Gross Unrealized Losses	(107)	(4,608)
Twelve Months or Greater, Fair Value	56,549	15,092
Twelve Months or Greater, Gross Unrealized Losses	(2,924)	(1,386)
Total, Fair Value	67,135	74,347
Total, Gross Unrealized Losses	(3,031)	(5,994)
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		13,130
Less than Twelve Months, Gross Unrealized Losses		(929)
Twelve Months or Greater, Fair Value	16,599	7,166
Twelve Months or Greater, Gross Unrealized Losses	(849)	(732)
Total, Fair Value	16,599	20,295
Total, Gross Unrealized Losses	(849)	(1,661)
US States and Political Subdivisions Debt Securities [Member] | Taxable [Member]
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than Twelve Months, Fair Value		1,301
Less than Twelve Months, Gross Unrealized Losses		(38)
Total, Fair Value		1,301
Total, Gross Unrealized Losses		(38)
US States and Political Subdivisions Debt Securities [Member] | Tax-exempt [Member]
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than Twelve Months, Fair Value		26,743
Less than Twelve Months, Gross Unrealized Losses		(2,883)
Twelve Months or Greater, Fair Value		2,678
Twelve Months or Greater, Gross Unrealized Losses		(383)
Total, Fair Value		29,421
Total, Gross Unrealized Losses		(3,267)
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	9,511
Less than Twelve Months, Gross Unrealized Losses	(104)
Twelve Months or Greater, Fair Value	19,616
Twelve Months or Greater, Gross Unrealized Losses	(1,585)
Total, Fair Value	29,127
Total, Gross Unrealized Losses	(1,689)
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	1,075	18,082
Less than Twelve Months, Gross Unrealized Losses	(3)	(757)
Twelve Months or Greater, Fair Value	20,334	5,248
Twelve Months or Greater, Gross Unrealized Losses	(490)	(271)
Total, Fair Value	21,409	23,330
Total, Gross Unrealized Losses	$ (493)	$ (1,028)