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Retirement Benefit Plans (Details) - USD ($)
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Pension Benefit [Member]    
Service cost $ 712,013 $ 864,611
Interest cost 3,866,809 3,960,212
Expected return on plan assets (4,396,137) (4,196,060)
Amortization of prior service cost 0 0
Amortization of the net loss 1,309,455 1,371,460
Net periodic benefit cost 1,492,140 2,000,223
Other Postretirement Benefit [Member]    
Service cost 14,296 25,945
Interest cost 51,805 58,131
Expected return on plan assets (18,736) (19,396)
Amortization of prior service cost 4,241 4,241
Amortization of the net loss (78,267) (67,581)
Net periodic benefit cost $ (26,661) $ 1,340