Fair Value Measurements and Disclosures - Schedule of Assets Recorded at Fair Value on a Recurring Basis (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
U.S. government treasury securities	$ 967,770	$ 962,150
U.S. government agency securities	43,860,090	40,984,897
State and municipal securities	7,573,689	6,452,597
Residential mortgage-backed securities	1,861,712	2,529,314
Corporate notes		2,524,165
Equity securities	100,380	112,380
Total	54,363,641	53,565,503
Level 1 [Member]
U.S. government treasury securities	967,770	962,150
U.S. government agency securities	0	0
State and municipal securities	0	0
Residential mortgage-backed securities	0	0
Corporate notes		0
Equity securities	0	0
Total	967,770	962,150
Level 2 [Member]
U.S. government treasury securities	0	0
U.S. government agency securities	43,860,090	40,984,897
State and municipal securities	7,573,689	6,452,597
Residential mortgage-backed securities	1,861,712	2,529,314
Corporate notes		2,524,165
Equity securities	100,380	112,380
Total	53,395,871	52,603,353
Level 3 [Member]
U.S. government treasury securities	0	0
U.S. government agency securities	0	0
State and municipal securities	0	0
Residential mortgage-backed securities	0	0
Corporate notes		0
Equity securities	0	0
Total	$ 0	$ 0