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Investments (Details 4) - Held-to-maturity Securities [Member] - USD ($) | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Estimated fair value | $ 6,913,536 | $ 8,753,159
Amortized cost | 7,768,218 | 8,266,334
Less Than One Year [Member] |  |
Estimated fair value | 497,110 | 1,008,180
Amortized cost | 459,032 | 994,712
One To Five Years [Member] |  |
Estimated fair value | 1,246,690 | 1,290,465
Amortized cost | 1,246,206 | 1,205,829
Five To Ten Years [Member] |  |
Estimated fair value | 1,370,950 | 1,648,808
Amortized cost | 1,519,749 | 1,513,942
More Than 10 Years [Member] |  |
Estimated fair value | 3,798,786 | 4,805,706
Amortized cost | $ 4,543,231 | $ 4,551,851

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