Note 7 - Loans (Details) - Contractual Aging of Nonaccrual Loans - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 7 - Loans (Details) - Contractual Aging of Nonaccrual Loans [Line Items]
Loans current & past due	$ 12,060	$ 12,610
Nonaccrual Loans [Member]
Note 7 - Loans (Details) - Contractual Aging of Nonaccrual Loans [Line Items]
Loans current & past due	12,060	12,610
Nonaccrual Loans [Member] | Financing Receivables, 1 to 29 Days Past Due [Member]
Note 7 - Loans (Details) - Contractual Aging of Nonaccrual Loans [Line Items]
Loans current & past due	6,885	6,959
Nonaccrual Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Note 7 - Loans (Details) - Contractual Aging of Nonaccrual Loans [Line Items]
Loans current & past due	669	369
Nonaccrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Note 7 - Loans (Details) - Contractual Aging of Nonaccrual Loans [Line Items]
Loans current & past due	$ 4,506	$ 5,282