Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	$ (5,963)	$ (5,296)
Consumer Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(3,351)	(3,460)
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(2,217)	(2,292)
Consumer Portfolio Segment [Member] | Student Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	0	(38)
Consumer Portfolio Segment [Member] | Other Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(1,134)	(1,130)
Commercial Real Estate Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(1,377)	(1,118)
Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(926)	(167)
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(44)	(356)
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(407)	(595)
Commercial Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(1,235)	(718)
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	(1,202)	(704)
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans [Line Items]
Loans Receivable	$ (33)	$ (14)