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Investments (Details 1) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Amortized cost	$ 145,045,584	$ 162,202,355
Estimated fair value	157,549,272	168,236,181
Less Than One Year [Member]
Amortized cost	8,559,005	11,986,401
Estimated fair value	8,668,064	12,025,804
One To Five Years [Member]
Amortized cost	44,137,567	49,715,422
Estimated fair value	47,745,430	51,000,025
Five To Ten Years [Member]
Amortized cost	55,508,712	69,850,104
Estimated fair value	63,159,775	74,410,275
More Than 10 Years [Member]
Amortized cost	8,676,409	4,511,795
Estimated fair value	9,314,062	4,568,847
Residential mortgage-backed securities [Member]
Amortized cost	28,163,891	26,138,633
Estimated fair value	$ 28,661,941	$ 26,231,230

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