RETIREMENT BENEFIT PLANS, Funded Status (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Funded status [Abstract]
Net amount recognized in the balance sheet	$ (26,631,438)	$ (24,304,926)
Pension Benefits [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	87,427,769	90,516,922
Change due to availability of final actual assets and census data	0	0
Discount rate	2,359,745	(4,121,170)
Service cost	1,977,295	3,770,191	$ 2,837,134
Interest cost	3,486,982	3,472,870	3,365,194
Actuarial (gain)/loss	2,940,154	(3,316,552)
Benefits paid	(3,398,419)	(2,894,492)
Additional recognition due to significant event	(2,534,589)	0
Benefit obligation at end of year	92,258,937	87,427,769	90,516,922
Change in fair value of plan assets [Roll Forward]
Fair value of plan assets at beginning of year	63,122,843	64,352,110
Actual return on plan assets	4,653,349	(1,340,977)
Employer contributions	1,249,726	3,006,202
Benefits paid	(3,398,419)	(2,894,492)
Fair value of plan assets at end of year	65,627,499	63,122,843	64,352,110
Funded status [Abstract]
Net amount recognized in the balance sheet	(26,631,438)	(24,304,926)
Other Postretirement Benefits [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	1,981,344	4,055,112
Change due to availability of final actual assets and census data	317,440	346
Discount rate	34,471	(87,748)
Service cost	29,300	217,570	173,902
Interest cost	94,872	154,915	157,481
Actuarial (gain)/loss	33,022	(2,235,904)
Benefits paid	(151,399)	(122,947)
Additional recognition due to significant event	0	0
Benefit obligation at end of year	2,339,050	1,981,344	4,055,112
Change in fair value of plan assets [Roll Forward]
Fair value of plan assets at beginning of year	1,188,289	1,149,204
Actual return on plan assets	99,061	39,085
Employer contributions	151,399	122,947
Benefits paid	(151,399)	(122,947)
Fair value of plan assets at end of year	1,287,350	1,188,289	$ 1,149,204
Funded status [Abstract]
Net amount recognized in the balance sheet	$ (1,051,700)	$ (793,055)