Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Credit risk profile based on payment activity:
Loans	$ 935,145	$ 931,943
Consumer Portfolio Segment [Member]
Credit risk profile based on payment activity:
Loans	12,029	13,413
Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	6,787	7,963
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	5,242	5,450
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	6,777	7,963
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	5,095	5,441
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	10	0
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	$ 147	$ 9