Note 4 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Credit risk profile based on payment activity:
Loans	$ 959,275	$ 931,943
Consumer Portfolio Segment [Member]
Credit risk profile based on payment activity:
Loans	12,419	13,413
Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	6,665	7,963
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	5,754	5,450
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity:
Loans	6,655	7,963
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity:
Loans	5,611	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	$ 143	$ 9