Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 14,372	$ 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	8,142	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	4,044	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	1,225	2,306
Consumer Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	547	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