Retirement Benefit Plans (Details 1) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Defined Contribution Plan [Abstract]
Total contributions for the period	$ 254,122	$ 205,120	$ 1,354,040	$ 1,281,688
Regular matching contribution [Member]
Defined Contribution Plan [Abstract]
Total contributions for the period	178,244	125,266	551,765	418,329
Transitional Credit Contribution [Member]
Defined Contribution Plan [Abstract]
Total contributions for the period	62,842	62,464	209,191	240,840
Non-Discretionary Contribution [Member]
Defined Contribution Plan [Abstract]
Total contributions for the period	$ 13,036	$ 17,390	$ 593,084	$ 622,519