Summary of Significant Accounting Policies (Accumulated Other Comprehensive Earnings (Loss)) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive earnings	$ 2,566,155	$ 3,168,615
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	2,953,936	(1,580,976)
Other comprehensive earnings before reclassification	3,019,434	3,393,585
Amount reclassified from accumulated other comprehensive earnings	(453,279)	(224,970)
Total other comprehensive earnings	2,566,155	3,168,615
Balance	5,520,091	2,953,936
Cumulative Effect, Period of Adoption, Adjustment [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		1,366,297
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 2,953,936	(214,679)
Balance		$ 2,953,936