Note 15 - Fair Values (Details Textual)	6 Months Ended
	Jun. 30, 2016 USD ($)
Collateral Impaired Loans [Member]
Collateral Dependent Impaired Loans Carrying Amount	$ 3,400,000
Fair Value Written Down	1,900,000
Allowance for Loan and Lease Losses, Adjustments, Other	1,500,000
Other Real Estate Owned [Member]
Fair Value Written Down	207,000
Allowance for Loan and Lease Losses, Adjustments, Other	$ 71,000
Number of Real Estate Properties	2
OREO Carry Amount	$ 278,000
Minimum [Member]
Other Real Estate Owned Fair Value Adjustments Estimated Selling Costs Percentage	8.00%
Maximum [Member]
Other Real Estate Owned Fair Value Adjustments Estimated Selling Costs Percentage	15.00%
Future Cash Flows Discounted	6.01%
Carrying Value of Loans Fully Charged off	$ 0