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Retirement Benefit Plans (Details) - USD ($) | 12 Months Ended | 24 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022
Pension Benefit [Member] |  |  |
Service cost | $ 1,078,973 | $ 1,087,333 | $ 1,078,973
Interest cost | 2,432,756 | 2,017,015 | 2,432,756
Expected return on plan assets | (5,842,641) | (5,794,694) |
Amortization of prior service cost | 66,252 | 99,380 |
Amortization of the net loss | 1,560,299 | 1,730,150 |
Net periodic benefit cost | (704,361) | (860,816) |
Other Postretirement Benefit [Member] |  |  |
Service cost | 53,291 | 54,505 | 53,291
Interest cost | 43,950 | 39,369 | $ 43,950
Expected return on plan assets | (17,600) | (25,681) |
Amortization of prior service cost | 0 | 0 |
Amortization of the net loss | (8,214) | (12,374) |
Net periodic benefit cost | $ 75,668 | $ 55,819 |

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