Note 8 - Commitments and Contingencies - Rent Expense and Rent Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Rent income (1)	[1]	$ 9	$ 32	$ 40	$ 52
Rent expense		218	221	612	516
Net rent expense		$ 209	$ 189	$ 572	$ 464

[1] Rental income is derived from OREO properties