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Investments (Details 4) - Held-to-maturity Securities [Member] - USD ($) | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Estimated fair value | $ 7,629,300 | $ 8,753,159
Amortized cost | 7,765,138 | 8,266,334
One To Five Years [Member] |  |
Estimated fair value | 1,262,780 | 1,290,465
Amortized cost | 1,206,159 | 1,205,829
Five To Ten Years [Member] |  |
Estimated fair value | 1,494,773 | 1,648,808
Amortized cost | 1,516,810 | 1,513,942
More Than 10 Years [Member] |  |
Estimated fair value | 4,369,952 | 4,805,706
Amortized cost | 4,547,574 | 4,551,851
Less Than One Year [Member] |  |
Estimated fair value | 501,795 | 1,008,180
Amortized cost | $ 494,595 | $ 994,712

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