Related Party Transactions - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
Sep. 30, 2018	Jun. 24, 2018	Jun. 25, 2017
Related Party Transaction [Line Items]
Related party receivables	$ 0	$ 0
Director [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Threshold for Individual Disclosure	$ 120,000	$ 120,000	$ 120,000

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Name:	us-gaap_AccountsReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant