Investment Securities (Details 1) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 4,371,538	$ 11,554,040
Due in one year to five years	94,804,499	72,622,056
Due in five years to ten years	22,991,242	53,290,088
Due in ten years and over	840,162	3,140,623
Total	123,007,441	140,606,807
Estimated Fair Value
Due in one year or less	4,391,446	11,546,968
Due in one year to five years	92,553,106	72,124,395
Due in five years to ten years	22,088,221	52,576,036
Due in ten years and over	798,552	3,002,851
Total	$ 119,831,325	$ 139,250,250