Note 6 - Foreclosed Real Estate - Net Loss on Foreclosed Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net (gain) loss on sales	$ 23	$ (3)	$ (30)
Direct write-downs	419	263	80
Operating expenses, net of income	34	56	94
	$ 476	$ 316	$ 144