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Deposits - Summary of interest expense on deposits (Details 1) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Deposits [Abstract]      
NOW and SuperNOW $ 9,711 $ 11,608 $ 11,300
Money Market 12,763 9,965 10,618
Savings 39,936 37,537 55,591
Certificates of Deposit, $100,000 or more 522,637 523,472 373,880
Other time deposits 1,165,027 1,310,732 1,562,938
Interest expense $ 1,750,074 $ 1,893,314 $ 2,014,327