Retirement Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Pension Benefit [Member]
Service cost	$ 864,611	$ 1,078,973
Interest cost	3,960,212	2,432,756
Expected return on plan assets	(4,196,060)	(5,842,641)
Amortization of prior service cost	0	66,252
Amortization of the net loss	1,371,460	1,560,299
Net periodic benefit cost	2,000,223	(704,361)
Other Postretirement Benefit [Member]
Service cost	25,945	53,291
Interest cost	58,131	43,950
Expected return on plan assets	(19,396)	(17,600)
Amortization of prior service cost	4,241	4,241
Amortization of the net loss	(67,581)	(8,214)
Net periodic benefit cost	$ 1,340	$ 75,668