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Retirement Benefit Plans (Details Narrative) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Jan. 01, 2022 | Dec. 31, 2021
Accrued amount for non discretionary safe harbor contribution | $ 379,090 | $ 323,082 |
Description of investment plan | The 401(k) Plan Amendment increased this match to 50% of the first 6% of contributions for the remainder of Fiscal 2016 and going forward. The 401(k) Plan Amendment also provided for an additional non-discretionary contribution (the “transitional credit”) for certain non-union U.S. employees who were eligible to participate in the Salaried Plan. The amount of this non-discretionary contribution ranges from 0% to 4% of wages, based on the age of the individual on June 1, 2016. The 401(k) Plan Amendment increased the non-discretionary safe harbor contribution to 3% and changed the eligibility to all non-union U.S. employees |  |
Pension Benefit [Member] |  |  |
Fair value of plan assets | $ 58,527,250 | $ 80,814,956 |
Discount rate | 2.08% | 26.10% | 1.49%
Accumulated benefit obligation | $ 80,701,715 | $ 107,420,338 |
2023 | 5,000,000.0 |  |
2024 | 5,100,000 |  |
2025 | 5,300,000 |  |
2026 | 5,500,000 |  |
2027 | 5,600,000 |  |
2028 through 2032 | 29,000,000.0 |  |
Cash contributions | 800,000 |  |
Dividend received | 95,488 | 95,488 |
Pension Benefit [Member] | Eastern Company Common Stock [Member] |  |  |
Fair value of plan assets | $ 4,184,107 | 5,460,173 |
Other Postretirement Benefit [Member] |  |  |
Discount rate | 5.28% |  | 2.66%
2023 | $ 46,000 |  |
2024 | 46,000 |  |
2025 | 49,000 |  |
2026 | 52,000 |  |
2027 | 53,000 |  |
2028 through 2032 | $ 302,000 |  |
Cash contributions |  | $ 50,000 |
Minimum [Member] | Pension Benefit [Member] |  |  |
Discount rate | 2.75% | 5.21% | 2.40%
Maximum [Member] | Pension Benefit [Member] |  |  |
Discount rate | 2.81% | 5.23% | 2.48%

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