Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Credit risk profile based on payment activity:
Loans	$ 933,305	$ 931,943
Consumer Portfolio Segment [Member]
Credit risk profile based on payment activity:
Loans	12,235	13,413
Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	7,152	7,963
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	5,083	5,450
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	7,140	7,963
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	4,933	5,441
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	12	0
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	$ 150	$ 9