Note 10 - FHLB Advances - Maturity and Interest Rate Information on Advances from FHLB (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amount due - one to two years after balance sheet date	$ 15,000
Weighted average interest rate at year-end - year two	0.29%
Total FHLB advances, Amount due	$ 15,000
Total FHLB advances, Weighted average interest rate at year-end	0.29%
Federal Home Loan Bank, Advances, Putable Option [Member]
Amount due within one year		$ 110,900
Weighted average interest rate at year-end - next 12 months		1.73%
Amount due - one to two years after balance sheet date		$ 5,000
Weighted average interest rate at year-end - year two		1.55%
Amount due - two to three years after balance sheet date		$ 23,400
Weighted average interest rate at year-end - year three		1.73%
Amount due - three to four years after balance sheet date		$ 20,000
Weighted average interest rate at year-end - year four		1.84%
Total FHLB advances, Amount due		$ 159,300
Total FHLB advances, Weighted average interest rate at year-end		1.74%