Note 15 - Commitments and Contingencies - Rent Expense and Rent Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Rent income(1)	[1]		$ 46	$ 78
Rent expense		922	841	707
Net rent expense		$ 922	$ 795	$ 629

[1] Rental income is derived from OREO properties