Note 6 - Foreclosed Real Estate - Foreclosed Real Estate Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Beginning balance	$ 3,971	$ 4,674	$ 4,890
Transfers from loans to foreclosed real estate	142	555	1,307
Direct write-downs	(419)	(263)	(80)
Sales	(558)	(1,023)	(1,504)
Capitalized expenses and other adjustments	6	28	61
Ending balance	$ 3,142	$ 3,971	$ 4,674