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Note E - Accounts Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 03, 2015
Jun. 03, 2014
Note E - Accounts Receivable (Details) [Line Items]    
Other Receivables, Net, Current $ 1,352us-gaap_OtherReceivablesNetCurrent $ 1,014us-gaap_OtherReceivablesNetCurrent
Due from Distributor [Member]    
Note E - Accounts Receivable (Details) [Line Items]    
Other Receivables, Net, Current 500us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_DueFromDistributorMember		 400us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_DueFromDistributorMember
Settlement Proceeds from Lawsuit [Member]    
Note E - Accounts Receivable (Details) [Line Items]    
Other Receivables, Net, Current 400us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_SettlementProceedsFromLawsuitMember		 100us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_SettlementProceedsFromLawsuitMember
Sales and Other Miscellaneous Tax Refunds [Member]    
Note E - Accounts Receivable (Details) [Line Items]    
Other Receivables, Net, Current $ 200us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_SalesAndOtherMiscellaneousTaxRefundsMember		 $ 200us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_SalesAndOtherMiscellaneousTaxRefundsMember