Retirement Benefit Plans (Details) - USD ($)	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Pension Benefit [Member]
Service Cost	$ 216,153	$ 269,744
Interest Cost	990,054	608,189
Expected Return On Plan Assets	1,049,016	1,460,661
Amortization Of Prior Service Cost	0	16,563
Amortization Of The Net Loss	342,865	390,075
Net Periodic Benefit Cost	(500,056)	(176,090)
Other Postretirement Benefit [Member]
Service Cost	6,486	13,323
Interest Cost	14,533	10,988
Expected Return On Plan Assets	4,849	4,400
Amortization Of Prior Service Cost	0	0
Amortization Of The Net Loss	1,060	1,060
Net Periodic Benefit Cost	(16,895)	(2,054)
Gain On Significant Event	$ 335	$ 18,917