Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Debt Securities (Details) - USD ($)	Sep. 30, 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	24,783,056	15,437,594
Available for Sale Amounts maturing in After five through ten years, Amortized Cost	29,782,725	35,610,754
Available for Sale Amounts maturing in After ten years, Amortized Cost	5,679,049	3,205,475
Total debt securities AFS, Amortized Cost	60,244,830	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	24,516,365	15,556,274
Available for Sale Amounts maturing in After five through ten years, Estimated Fair Value	28,443,405	35,441,617
Available for Sale Amounts maturing in After ten years, Estimated Fair Value	5,616,435	3,265,370
Total debt securities AFS, Estimated Fair Value	58,576,205	54,263,261
Held to Maturity Amounts maturing in One year or less, Amortized Cost	8,145,043	9,812,609
Held to Maturity Amounts maturing in After one through five years, Amortized Cost	14,799,992	19,467,142
Held to Maturity Amounts maturing in After five through ten years, Amortized Cost	11,471,319	12,546,856
Held to Maturity Amounts maturing in After ten years, Amortized Cost	2,544,244	2,764,234
Total securities HTM, Amortized Cost	36,960,598	44,590,841
Held to Maturity Amounts maturing in One year or less, Estimated Fair Value	8,157,231	9,821,948
Held to Maturity Amounts maturing in After one through five years, Estimated Fair Value	14,853,083	19,680,375
Held to Maturity Amounts maturing in After five through ten years, Estimated Fair Value	11,414,767	12,806,108
Held to Maturity Amounts maturing in After ten years, Estimated Fair Value	2,510,056	2,839,369
Total securities HTM, Estimated Fair Value	$ 36,935,137	$ 45,147,800