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Note J - Employee Post-employment Benefits (Details) - Roll Forward of Employee Separation Obligations (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Mar. 03, 2015
Jun. 03, 2014
Note J - Employee Post-employment Benefits (Details) - Roll Forward of Employee Separation Obligations [Line Items]    
Employee severance and unused vacation accruals $ 1,005us-gaap_SeveranceCosts1  
Cash payments (1,853)rt_PaymentsToEmployeesForSeveranceAndUnusedVacation  
Employee Severance [Member]    
Note J - Employee Post-employment Benefits (Details) - Roll Forward of Employee Separation Obligations [Line Items]    
Employee related liabilities 207us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
1,055us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Employee severance and unused vacation accruals $ 300us-gaap_SeveranceCosts1
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember