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Interest-bearing Deposits - Scheduled maturities of time deposits (Details 1) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Banking and Thrift [Abstract]    
2017 $ 47,319,320  
2018 14,869,536  
2019 7,572,666  
2020 5,387,756  
2021 5,037,258  
Time deposits $ 80,186,536 $ 79,054,524