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RETIREMENT BENEFIT PLANS, Amounts Recognized in, and Changes in Components of Accumulated Other Comprehensive Income (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016 | Dec. 30, 2017 | Dec. 31, 2016
Amounts recognized in accumulated other comprehensive income [Abstract] |  |  |  |  |
Total | $ 21,039,520 | $ 21,039,520 |  | $ 20,485,277 | $ 21,039,520
Defined Benefit Plan, Change in components of accumulated other comprehensive income [Abstract] |  |  |  |  |
Balance at beginning of period | 21,039,520 |  |  |  |
Liability (gains)/losses [Abstract] |  |  |  |  |
Balance at end of period | 20,485,277 | 21,039,520 |  |  |
Pension Benefits [Member] |  |  |  |  |
Amounts recognized in accumulated other comprehensive income [Abstract] |  |  |  |  |
Net (loss)/gain |  |  |  | (32,565,614) | (33,623,438)
Prior service (cost) credit |  |  |  | (494,142) | (176,117)
Total | (33,799,555) | (33,799,555) | $ (32,597,167) | (33,059,756) | (33,799,555)
Defined Benefit Plan, Change in components of accumulated other comprehensive income [Abstract] |  |  |  |  |
Balance at beginning of period | (33,799,555) | (32,597,167) |  |  |
Change due to availability of final actual assets and census data | 0 | 0 |  |  |
Charged to net periodic benefit cost [Abstract] |  |  |  |  |
Prior service cost | 178,874 | 200,568 | 218,585 |  |
Net loss (gain) | 1,231,486 | 1,704,863 | 1,928,298 |  |
Liability (gains)/losses [Abstract] |  |  |  |  |
Discount rate | (6,200,491) | (2,359,745) |  |  |
Asset (gains)/losses deferred | 5,978,071 | (4,325,232) |  |  |
Additional recognition due to plan amendment | (496,899) | 2,534,589 |  |  |
Other | 48,758 | 1,042,569 |  |  |
Balance at end of period | (33,059,756) | (33,799,555) | (32,597,167) |  |
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year [Abstract] |  |  |  |  |
Net (loss) gain |  |  |  | (1,118,370) |
Prior service cost (credit) |  |  |  | 120,968 |
Other Postretirement Benefits [Member] |  |  |  |  |
Amounts recognized in accumulated other comprehensive income [Abstract] |  |  |  |  |
Net (loss)/gain |  |  |  | 1,089,785 | 1,231,081
Prior service (cost) credit |  |  |  | 18,397 | 39,841
Total | 1,108,182 | 1,270,922 | 1,722,137 | 1,108,182 | $ 1,270,922
Defined Benefit Plan, Change in components of accumulated other comprehensive income [Abstract] |  |  |  |  |
Balance at beginning of period | 1,270,922 | 1,722,137 |  |  |
Change due to availability of final actual assets and census data | 0 | (317,440) |  |  |
Charged to net periodic benefit cost [Abstract] |  |  |  |  |
Prior service cost | (21,444) | (23,890) | (23,889) |  |
Net loss (gain) | (77,601) | (93,921) | 18,804 |  |
Liability (gains)/losses [Abstract] |  |  |  |  |
Discount rate | (181,691) | (34,471) |  |  |
Asset (gains)/losses deferred | 52,395 | 51,529 |  |  |
Additional recognition due to plan amendment | 0 | 0 |  |  |
Other | 65,601 | (33,022) |  |  |
Balance at end of period | $ 1,108,182 | 1,270,922 | $ 1,722,137 |  |
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year [Abstract] |  |  |  |  |
Net (loss) gain |  |  |  | 65,591 |
Prior service cost (credit) |  |  |  | $ (5,072) |
Salaried Plan [Member] |  |  |  |  |
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year [Abstract] |  |  |  |  |
Pension expense |  | $ (2,447,000) |  |  |

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