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:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)	3 Months Ended		12 Months Ended
GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)	Sep. 26, 2020 USD ($)	Jun. 27, 2020 USD ($)	Dec. 26, 2020 USD ($) tradeName
Indefinite-lived Intangible Assets
Number of trade names impaired \| tradeName			2
Goodwill impairment	$ 0		$ 12,575,000
Access Systems
Indefinite-lived Intangible Assets
Goodwill impairment		$ 12,575,000
Trade Names
Indefinite-lived Intangible Assets
Impairment of intangible assets	$ 0		$ 3,900,000