Note 6 - Foreclosed Real Estate - Foreclosed Real Estate Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Beginning balance	$ 0	$ 170	$ 3,142
Transfers from loans to foreclosed real estate	126	67	311
Direct write-downs	(5)	0	(284)
Sales	(85)	(237)	(3,002)
Capitalized expenses and other adjustments	0	0	3
Ending Balance	$ 36	$ 0	$ 170