Note 15 - Assets and Liabilities Measured and Reported at Fair Value (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Note 15 - Assets and Liabilities Measured and Reported at Fair Value (Details) [Line Items]
Impaired Financing Receivable, Related Allowance	$ 1,603,000	$ 1,376,000
Impaired Financing Receivable, with Related Allowance, Recorded Investment	6,735,000	7,826,000
Other Real Estate, Foreclosed Assets, and Repossessed Assets	4,600,000	6,000,000
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	0
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount	0
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	0
Impaired Loans [Member]
Note 15 - Assets and Liabilities Measured and Reported at Fair Value (Details) [Line Items]
Assets, Fair Value Disclosure	5,132,000
Appraisal Discount Method [Member] | Impaired Loans [Member]
Note 15 - Assets and Liabilities Measured and Reported at Fair Value (Details) [Line Items]
Assets, Fair Value Disclosure	5,100,000	6,400,000
Mortgage Servicing Rights [Member]
Note 15 - Assets and Liabilities Measured and Reported at Fair Value (Details) [Line Items]
Impaired Financing Receivable, Related Allowance	0	0
Fair Value, Inputs, Level 3 [Member]
Note 15 - Assets and Liabilities Measured and Reported at Fair Value (Details) [Line Items]
Assets, Fair Value Disclosure	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0	$ 0