Note 8 - Deposits - Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Non-interest bearing	$ 148,893	$ 126,263
Non-interest bearing deposits	19.60%	19.30%
Interest bearing demand deposits, weighted average rate	0.52%	0.44%
Interest bearing demand deposits, amount	$ 391,054	$ 357,693
Interest bearing demand deposits	51.40%	54.60%
Time deposits, weighted average rate	1.84%	1.58%
Time deposits, amount	$ 221,599	$ 170,687
Time deposits	29.10%	26.10%
Weighted average rate	0.80%	0.65%
Total deposits	$ 761,546	$ 654,643
Percent	100.00%	100.00%