Note 8 - FHLB Advances - Summary of Scheduled Maturities of Fixed Term FHLB Advances (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fixed rate advances, amount, 2019	$ 5,750
Adjustable rate advances, amount, 2019	2,000
2019	7,750
Fixed rate advances, amount, 2020	6,000
Adjustable rate advances, amount, 2020	2,000
2020	8,000
Fixed rate advances, amount, 2021
Adjustable rate advances, amount, 2021	2,000
2021	2,000
Fixed rate advances, amount, Total	11,750
Adjustable rate advances, amount, Total	6,000
Total	$ 17,750	$ 12,750
Weighted Average [Member]
Fixed rate advances, weighted average rate, 2019	2.21%
Adjustable rate advances, weighted average rate, 2019	1.54%
Fixed rate advances, weighted average rate, 2020	2.34%
Adjustable rate advances, weighted average rate, 2020	1.69%
Fixed rate advances, weighted average rate, 2021
Adjustable rate advances, weighted average rate, 2021	2.05%
Fixed rate advances, weighted average rate, Total	2.28%
Adjustable rate advances, weighted average rate, Total	1.76%