Note 6 - Premises and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Depreciation	$ 801	$ 749	$ 732
Operating Leases, Future Minimum Payments Due, Next Twelve Months	292
Operating Leases, Future Minimum Payments, Due in Two Years	292
Operating Leases, Future Minimum Payments, Due in Three Years	233
Operating Leases, Future Minimum Payments, Due in Four Years	56
Operating Leases, Future Minimum Payments, Due in Five Years	34
Operating Leases, Future Minimum Payments, Due Thereafter	$ 164