Note 3 - Derivative Instruments and Hedging Activities (Details)	9 Months Ended
	Sep. 30, 2015 USD ($)
Other Liabilities [Member]
Note 3 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Increase (Decrease) in Derivative Liabilities	$ 75,000
Gain on Sales of Loans [Member]
Note 3 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	75,000
Mortgage Pipeline [Member] | Other Assets [Member]
Note 3 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Increase (Decrease) in Derivative Assets	76,000
Mortgage Pipeline [Member] | Other Liabilities [Member]
Note 3 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Increase (Decrease) in Derivative Liabilities	9,000
Mortgage Pipeline [Member] | Gain on Sales of Loans [Member]
Note 3 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 67,000