CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) shares in Thousands	12 Months Ended
Oct. 01, 2016 shares
Retirement of treasury shares	1,356

Number of shares that have been repurchased and retired during the period.

No definition available.

Name:	arkr_RetirementOfTreasuryShares
Namespace Prefix:	arkr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration