Note 6 - Loans Receivable and Allowance for Loan Losses - Non-accrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Commercial Real Estate Portfolio Segment [Member]
Non-accrual loans	$ 13,280	$ 5,913
Construction and Land Development Portfolio Segment [Member]
Non-accrual loans	56	117
Commercial Portfolio Segment [Member]
Non-accrual loans	3,149	3,156
Owner Occupied Real Estate [Member]
Non-accrual loans	1,874	2,894
Consumer Portfolio Segment [Member]
Non-accrual loans	979	542
Residential Portfolio Segment [Member]
Non-accrual loans
Non-accrual loans	$ 19,338	$ 12,622