Investment Securities - Schedule of Securities Available for Sale (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Amortized Cost	$ 57,192,361	$ 54,354,203
Unrealized Gains	281,130	761,248
Unrealized Losses	1,245,561	751,810
Total Estimated Fair Value	56,127,550	54,263,261
U.S. Government Treasury Securities [Member]
Amortized Cost	980,491	979,983
Unrealized Gains	0	0
Unrealized Losses	37,361	12,213
Total Estimated Fair Value	943,130	967,770
U.S. Government Agency Securities [Member]
Amortized Cost	44,930,017	43,978,023
Unrealized Gains	241,553	580,366
Unrealized Losses	1,117,816	698,299
Total Estimated Fair Value	44,053,754	43,860,090
State and Municipal Securities [Member]
Amortized Cost	7,460,936	7,482,912
Unrealized Gains	9,365	129,231
Unrealized Losses	82,341	38,454
Total Estimated Fair Value	7,387,960	7,573,689
Residential Mortgage-Backed Securities [Member]
Amortized Cost	3,720,537	1,812,905
Unrealized Gains	30,212	51,651
Unrealized Losses	8,043	2,844
Total Estimated Fair Value	$ 3,742,706	$ 1,861,712