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Investments (Details 4) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Amortized cost	$ 9,180,786	$ 7,368,815
Estimated fair value	9,564,055	8,194,824
Less Than One Year [Member]
Amortized cost	500,639	0
Estimated fair value	512,985	0
One To Five Years [Member]
Amortized cost	2,098,011	2,598,193
Estimated fair value	2,244,083	2,777,936
Five To Ten Years [Member]
Amortized cost	1,505,366	1,502,603
Estimated fair value	1,639,444	1,727,316
More Than 10 Years [Member]
Amortized cost	5,076,770	3,268,019
Estimated fair value	$ 5,167,543	$ 3,689,572

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