Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Land	$ 3,846,146	$ 3,866,891
Building	12,821,154	12,512,392
Furniture and equipment	9,442,378	8,846,887
Construction in process	1,074,744	162,231
Premises and equipment, gross	27,184,422	25,388,401
Less accumulated depreciation	(14,934,904)	(14,179,116)
Total	$ 12,249,518	$ 11,209,285