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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)

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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