Note 9 - Securities Sold Under Agreements to Repurchase and Other Long-term Borrowings - Long-term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Federal Home Loan Bank advances	$ 18,646	$ 18,806
Federal Home Loan Bank advances, average rate	3.97%	3.98%
Subordinated notes payable	$ 33,506	$ 48,970
Subordinated notes payable, average rate	2.30%	1.94%
Securities sold under agreements to repurchase	$ 1,285	$ 101,474
Securities sold under agreements to repurchase, average rate	0.75%	3.90%
Total long-term borrowings	$ 53,437	$ 169,250
Total long-term borrowings, average rate	2.84%	3.34%