Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 15,977	$ 21,440
Commercial Real Estate Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	8,430	13,979
Construction and Land Development Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	414	377
Commercial Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	4,049	4,349
Owner Occupied Real Estate [Member]
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	2,666	2,306
Consumer Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	418	429
Residential Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 0	$ 0