Note 6 - Foreclosed Real Estate - Foreclosed Real Estate Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Beginning balance	$ 3,142	$ 3,971	$ 4,674
Transfers from loans to foreclosed real estate	311	142	555
Direct write-downs	(284)	(419)	(263)
Sales	(3,002)	(558)	(1,023)
Capitalized expenses and other adjustments	3	6	28
Ending balance	$ 170	$ 3,142	$ 3,971