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Retirement Benefit Plans (Details 2) - USD ($) | 12 Months Ended
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Dec. 28, 2024 | Dec. 30, 2023
Other Postretirement Benefit [Member] |  |
Change in discount rate | $ (81,579) | $ 35,126
Service cost | 14,296 | 25,945
Interest cost | 51,805 | 58,131
Plan amendment | (44,757) |
Actuarial (gain)/loss | (85,064) | (162,766)
Benefits paid | (27,362) | (37,286)
Benefit obligation at end of year | 897,615 | 1,070,276
Net amount recognized in the balance sheet | (410,476) | (554,758)
Benefit obligation at beginning of year | 1,070,276 | 1,151,126
Pension Benefits [Member] |  |
Change in discount rate | (4,449,660) | 1,794,084
Service cost | 712,013 | 864,611
Interest cost | 3,866,809 | 3,960,212
Actuarial (gain)/loss | (924,172) | (587,910)
Benefits paid | (5,150,941) | (4,870,701)
Benefit obligation at end of year | 75,916,060 | 81,862,011
Net amount recognized in the balance sheet | (16,604,840) | (21,025,365)
Benefit obligation at beginning of year | 81,862,011 | 80,701,715
Pension Plans Defined Benefit [Member] |  |
Benefits paid | (5,150,941) | (4,870,701)
Fair value of plan assets at beginning of year | 60,836,643 | 58,527,250
Actual return on plan assets | 1,509,268 | 5,902,956
Employer contributions | 2,116,250 | 1,277,138
Fair value of plan assets at end of year | 59,311,220 | 60,836,643
Other Postretirement Benefit Plans Defined Benefit [Member] |  |
Benefits paid | (46,479) | (51,180)
Fair value of plan assets at beginning of year | 468,403 | 484,904
Actual return on plan assets | 18,736 | (16,501)
Employer contributions | 46,479 | 51,180
Fair value of plan assets at end of year | $ 487,139 | $ 468,403

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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