RETIREMENT BENEFIT PLANS, Funded Status (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Pension Benefit [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	$ 98,522,201	$ 92,258,937
Change due to availability of final actual assets and census data	0	0
Change in discount rate	(8,319,874)	6,200,491
Service cost	1,319,841	1,276,608
Interest cost	3,107,164	3,170,194
Actuarial (gain)/loss	531,799	(1,495,135)
Benefits paid	(3,627,931)	(3,385,793)
Plan amendment	0	496,899
Benefit obligation at end of year	91,533,200	98,522,201
Change in fair value of plan assets [Roll Forward]
Fair value of plan assets at beginning of year	72,098,772	65,627,499
Actual return on plan assets	(4,827,641)	9,315,225
Employer contributions	2,527,675	541,841
Benefits paid	(3,627,931)	(3,385,793)
Fair value of plan assets at end of year	66,170,875	72,098,772
Funded Status [Abstract]
Net amount recognized in the balance sheet	(25,362,325)	(26,423,429)
Other Postretirement Benefit [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	2,423,410	2,339,050
Change due to availability of final actual assets and census data	0	0
Change in discount rate	(217,539)	181,691
Service cost	37,024	27,389
Interest cost	77,161	80,827
Actuarial (gain)/loss	(89,664)	(65,601)
Benefits paid	(133,631)	(139,946)
Benefit obligation at end of year	2,096,761	2,423,410
Change in fair value of plan assets [Roll Forward]
Fair value of plan assets at beginning of year	1,391,239	1,287,350
Actual return on plan assets	56,887	103,889
Employer contributions	133,631	139,946
Benefits paid	(133,631)	(139,946)
Fair value of plan assets at end of year	1,448,126	1,391,239
Funded Status [Abstract]
Net amount recognized in the balance sheet	$ (648,635)	$ (1,032,171)