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Investments (Details 4) - Held-to-maturity Securities [Member] - USD ($) | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Amortized cost | $ 7,767,183 | $ 8,266,334
Estimated fair value | 6,611,858 | 8,753,159
Less Than One Year [Member] |  |
Amortized cost | 708,325 | 994,712
Estimated fair value | 742,533 | 1,008,180
One To Five Years [Member] |  |
Amortized cost | 1,120,315 | 1,205,829
Estimated fair value | 1,082,015 | 1,290,465
Five To Ten Years [Member] |  |
Amortized cost | 1,399,725 | 1,513,942
Estimated fair value | 1,177,545 | 1,648,808
More Than 10 Years [Member] |  |
Amortized cost | 4,538,818 | 4,551,851
Estimated fair value | $ 3,609,765 | $ 4,805,706

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