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v3.21.1

COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands | 6 Months Ended
--- | ---
Apr. 03, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract] |
Lease expiration year | 2044
Letters of credit outstanding, amount | $ 238

X
- Definition Lease expiration year. + References No definition available. + Details
Name: | arkr_LeaseExpirationYear
Namespace Prefix: | arkr_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant