Note 8 - Deposits - Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Non-interest bearing	$ 148,842	$ 148,893
Non-interest bearing deposits	18.90%	19.50%
Interest bearing demand deposits, weighted average rate	0.76%	0.52%
Interest bearing demand deposits, amount	$ 420,515	$ 391,054
Interest bearing demand deposits	53.40%	51.40%
Time deposits, weighted average rate	2.17%	1.84%
Time deposits, amount	$ 217,767	$ 221,599
Time deposits	27.70%	29.10%
Weighted average rate	1.01%	0.80%
Amount	$ 787,124	$ 761,546
Percent	100.00%	100.00%