Note 7 - Loans and Allowance for Loan Losses - Risk Category of Loans by Class-Consumer (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Loans, net of unearned income	$ 4,550,000	$ 6,655,000
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Loans, net of unearned income	4,940,000	5,611,000
Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Loans, net of unearned income	7,000	10,000
Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Loans, net of unearned income	141,000	143,000
Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Loans, net of unearned income	4,557,000	6,665,000
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Loans, net of unearned income	5,081,000	5,754,000
Consumer Portfolio Segment [Member]
Loans, net of unearned income	9,638,000	12,419,000
Loans, net of unearned income	$ 957,426,000	$ 959,275,000