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Note E - Accounts Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 02, 2014
Jun. 03, 2014
Note E - Accounts Receivable (Details) [Line Items]    
Other Receivables, Net, Current $ 1,645us-gaap_OtherReceivablesNetCurrent $ 1,014us-gaap_OtherReceivablesNetCurrent
Due from Distributor [Member]    
Note E - Accounts Receivable (Details) [Line Items]    
Other Receivables, Net, Current 800us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_DueFromDistributorMember		 400us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_DueFromDistributorMember
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
Settlement Proceeds from Lawsuit [Member]    
Note E - Accounts Receivable (Details) [Line Items]    
Other Receivables, Net, Current $ 200us-gaap_OtherReceivablesNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= rt_SettlementProceedsFromLawsuitMember