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Investments (Details 1) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Amortized cost	$ 139,299,693	$ 145,045,584
Estimated fair value	147,585,805	157,549,272
Less Than One Year [Member]
Amortized cost	9,079,054	8,559,005
Estimated fair value	9,181,876	8,668,064
One To Five Years [Member]
Amortized cost	43,059,233	44,137,567
Estimated fair value	46,164,289	47,745,430
Five To Ten Years [Member]
Amortized cost	51,273,291	55,508,712
Estimated fair value	55,781,784	63,159,775
More Than 10 Years [Member]
Amortized cost	11,983,778	8,676,409
Estimated fair value	12,087,935	9,314,062
Residential mortgage-backed securities [Member]
Amortized cost	23,904,337	28,163,891
Estimated fair value	$ 24,369,921	$ 28,661,941

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