Note 6 - Other Real Estate Owned - Expenses Related to Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net gain on sales of other real estate owned		$ (72)	$ (74)
Valuation adjustment write-downs	260	850	1,963
Operating expense	108	90	84
Total	$ 368	$ 868	$ 1,973