Note 6 - Foreclosed Real Estate - Net Loss on Foreclosed Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net (gain) loss on sales	$ 0	$ 4	$ (114)
Direct write-downs	5	(0)	284
Operating expenses, net of income	14	9	129
Ending Balance	$ 19	$ 13	$ 299