Retirement Benefit Plans (Details 1) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Oct. 02, 2021	Oct. 03, 2020
Total contributions for the period	$ 183,133	$ 254,122	$ 918,884	$ 1,354,040
Regular Matching Contributions [Member]
Total contributions for the period	135,664	178,244	433,061	551,765
Transitional Credit Contributions [Member]
Total contributions for the period	32,468	62,842	108,337	209,191
Non-Discretionary Contributions [Member]
Total contributions for the period	$ 15,001	$ 13,036	$ 377,486	$ 593,084