Summary of Significant Accounting Policies (Summary of Components of Other Comprehensive Earnings) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Summary of Significant Accounting Policies [Abstract]
Unrealized holding (losses) gains arising during the period, Pre-tax	$ (74,733)	$ 764,541	$ (2,222,069)	$ 1,291,868
Reclassification adjustment for (gains) losses included in net earnings, Pre-tax	29,930	57,319	(1,072,200)	(387,462)
Total other comprehensive (loss) earnings, Pre-tax	(44,803)	821,860	(3,294,269)	904,406
Unrealized holding (losses) gains arising during the period, Tax	15,692	(259,944)	466,634	(439,235)
Reclassification adjustment for (gains) losses included in net earnings, Tax	(6,285)	(19,489)	225,162	131,737
Total other comprehensive (loss) earnings, Tax	9,407	(279,433)	691,796	(307,498)
Unrealized holding (losses) gains arising during the period, After-tax	(59,041)	504,597	(1,755,435)	852,633
Reclassification adjustment for (gains) losses included in net earnings, After-tax	23,645	37,830	(847,038)	(255,725)
Total other comprehensive (loss) earnings	$ (35,396)	$ 542,427	$ (2,602,473)	$ 596,908