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Retirement Benefit Plans (Details Narrative) - USD ($) | 12 Months Ended
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Dec. 28, 2024 | Dec. 30, 2023
Accrued amount for non discretionary safe harbor contribution |  | $ 328,953
Description of investment plan |  | The Eastern Company Savings and Investment Plan as amended effective April 1, 2023 (“401(k) Plan Amendment”) provides for a match of 50% of the first 6% of employee contributions. The 401(k) Plan Amendment also provides for an additional non-discretionary contribution (the “transitional credit”) for certain non-union U.S. employees. 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 provides a non-discretionary safe harbor contribution of 3%. All non-union U.S. employees are eligible to join the plan
Pension Benefit [Member] |  |
Accumulated benefit obligation | $ 75,916,060 | $ 81,862,011
2025 |  | 5,400,000
2026 |  | 5,400,000
2027 |  | 5,500,000
2028 |  | 5,700,000
2029 |  | 5,700,000
2030 through 2034 |  | 28,800,000
Cash contributions | 2,900,000 |
Dividend received | 95,488 | 95,488
Pension Benefit [Member] | Eastern Company Common Stock [Member] |  |
Fair value of plan assets | 5,759,658 | 4,774,396
Other Postretirement Benefit [Member] |  |
2025 |  | 42,000
2026 |  | 44,000
2027 |  | 44,000
2028 |  | 46,000
2029 |  | 49,000
2030 through 2034 |  | $ 261,000
Cash contributions | $ 42,000 |

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