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Short-Term Borrowed Funds - Summary of FHLB (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Debt Disclosure [Abstract]    
Average balance during the year $ 17,305,184 $ 12,238,066
Average interest rate during the year 2.29% 1.83%
Maximum month-end balance during the year $ 20,971,429 $ 22,114,286