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Note 7 - FHLB Advances - FHLB Advances (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Open line of credit $ 6,750
Fixed rate, fixed term advances 23,250 4,750
Fixed term advances with floating spread 8,000 8,000
Total $ 38,000 $ 12,750
Minimum [Member]    
Open line of credit rate 2.12%
Fixed rate, fixed term advances rate 1.42% 1.42%
Fixed term advances with floating spread rate 1.32% 1.39%
Maximum [Member]    
Open line of credit rate 2.12%
Fixed rate, fixed term advances rate 2.06% 1.92%
Fixed term advances with floating spread rate 1.74% 1.96%