GOODWILL AND INTANGIBLE ASSETS - Goodwill Impairment (Details) - USD ($)	9 Months Ended	12 Months Ended
Sep. 25, 2021	Dec. 26, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment loss	$ 0	$ 12,575,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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