Note 8 - Fair Value Measurements (Details) - Level 3 Fair Value Measurements (Impaired Loans [Member])	9 Months Ended
	Sep. 30, 2014
Present Value of Cash Flows [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	5.88%
Present Value of Cash Flows [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	9.50%
Present Value of Cash Flows [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	6.11%
Present Value of Cash Flows [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	Present value of cash flows
Impaired loans	Present value of cash flows
Discounted Appraised Value [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	10.00%	[1]
Discounted Appraised Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	Discounted appraised value
Impaired loans	Discounted appraised value

[1] As of September 30, 2014, the collateral method of fair valuation was applied to one loan.