Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Securities (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Schedule of Investments [Abstract]
Available for Sale Amounts maturing in One year or less, Amortized Cost	$ 0	$ 0
Available for Sale Amounts maturing in After one through five years, Amortized Cost	17,237,022	15,437,594
Available for Sale Amounts maturing in After five through ten years, Amortized Cost	35,605,150	35,610,754
Available for Sale Amounts maturing in After ten years, Amortized Cost	4,249,809	3,205,475
Total debt securities AFS, Amortized Cost	57,091,981	54,253,823
Available for Sale Amounts maturing in One year or less, Estimated Fair Value	0	0
Available for Sale Amounts maturing in After one through five years, Estimated Fair Value	17,146,703	15,556,274
Available for Sale Amounts maturing in After five through ten years, Estimated Fair Value	34,722,501	35,441,617
Available for Sale Amounts maturing in After ten years, Estimated Fair Value	4,258,346	3,265,370
Total debt securities AFS, Estimated Fair Value	56,127,550	54,263,261
Held to Maturity Amounts maturing in One year or less, Amortized Cost	11,388,180	9,812,609
Held to Maturity Amounts maturing in After one through five years, Amortized Cost	18,186,344	19,467,142
Held to Maturity Amounts maturing in After five through ten years, Amortized Cost	11,562,923	12,546,856
Held to Maturity Amounts maturing in After ten years, Amortized Cost	2,760,631	2,764,234
Total securities HTM, Amortized Cost	43,898,078	44,590,841
Held to Maturity Amounts maturing in One year or less, Estimated Fair Value	11,393,123	9,821,948
Held to Maturity Amounts maturing in After one through five years, Estimated Fair Value	18,361,598	19,680,375
Held to Maturity Amounts maturing in After five through ten years, Estimated Fair Value	11,597,169	12,806,108
Held to Maturity Amounts maturing in After ten years, Estimated Fair Value	2,761,190	2,839,369
Total securities HTM, Estimated Fair Value	$ 44,113,080	$ 45,147,800