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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2020	Dec. 25, 2019	Dec. 26, 2018
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 895	$ 772	$ 509
Defined Contribution Plan, Initial Contribution
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution percentage	50.00%
Employer matching contribution as a percent of employees' gross pay	3.00%
Defined Contribution Plan, Additional Contribution
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution as a percent of employees' gross pay	3.00%
Defined Contribution Plan, Additional Contribution | Maximum
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution as a percent of employees' gross pay	5.00%

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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 cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

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