Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 11,819	$ 12,622
Commercial Real Estate Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	5,736	5,913
Construction and Land Development Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	117	117
Commercial Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	2,448	3,156
Owner Occupied Real Estate [Member]
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	2,786	2,894
Consumer Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	732	542
Residential Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 0	$ 0