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RETIREMENT BENEFIT PLANS, Defined Contribution Plan (Details) - USD ($) | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total contributions made for the period | $ 1,206,996 | $ 611,461 | $ 232,399
Regular Matching Contributions [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total contributions made for the period | 465,671 | 328,144 | 232,399
Transitional Credit Contributions [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total contributions made for the period | 385,578 | 231,847 | 0
Non-discretionary Contributions [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total contributions made for the period | $ 355,747 | $ 51,470 | $ 0
Plan 401 K Plan Amendment [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of voluntary contributions allowed to participants, maximum | 100.00% |  |
Employer matching contribution percentage |  | 50.00% |
Increase in employer matching contribution on first of total employee contributions, percentage |  | 6.00% |
Non-discretionary contribution percentage for employees who were not eligible to participate in the salaried plan |  | 3.00% |
Non-Union U.S. Employees [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total contributions made for the period | $ 502,618 | $ 307,568 |
Non-Union U.S. Employees [Member] | Minimum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Non-discretionary contribution percentage for certain employees who were eligible to participate in the salaried plan |  | 0.00% |
Non-Union U.S. Employees [Member] | Maximum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Non-discretionary contribution percentage for certain employees who were eligible to participate in the salaried plan |  | 4.00% |

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- Definition Non-discretionary percentage of contribution for the eligible employees. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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