Note 7 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabililties Measure on Non-Recurring Basis (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Note 7 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabililties Measure on Non-Recurring Basis [Line Items]
Impaired loans, net of valuation allowance	$ 309	$ 1,130
Other real estate owned	8,400	8,938	10,090	9,562
Fair Value, Inputs, Level 1 [Member]
Note 7 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabililties Measure on Non-Recurring Basis [Line Items]
Impaired loans, net of valuation allowance	0	0
Other real estate owned	0	0
Fair Value, Inputs, Level 2 [Member]
Note 7 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabililties Measure on Non-Recurring Basis [Line Items]
Impaired loans, net of valuation allowance	309	62
Other real estate owned	6,407	4,382
Fair Value, Inputs, Level 3 [Member]
Note 7 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabililties Measure on Non-Recurring Basis [Line Items]
Impaired loans, net of valuation allowance	0	1,068
Other real estate owned	$ 1,993	$ 4,556