Note 7 - Closures and Impairments Expense, Including Trademark Impairments - Future Liabilities Associated with Closed Properties (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 06, 2017	May 31, 2016
Balance	$ 6,270	$ 7,051
Closing expense including rent and other lease charges	18,035	4,090
Payments	(17,205)	(5,737)
Adjustments to deferred escalating minimum rent and other	9,130	866
Balance	$ 16,230	$ 6,270

Amount of cash paid during the period to settle lease obligations associated with closed properties.

No definition available.

Name:	rt_PaymentsClosedPropertyLeaseObligation
Namespace Prefix:	rt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration