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Debt Obligations Aggregate Maturities (Details) (USD $)
In Millions, unless otherwise specified
Jan. 01, 2015
Dec. 26, 2013
Debt Disclosure [Abstract]    
2015 $ 0.3us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths  
2016 0.2us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo  
2017 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree  
2018 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour  
2019 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive  
Thereafter 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive  
Subtotal 0.5uatc_BorrowedFundsBeforeInterestOnCapitalLeases  
Less interest on capital leases 0uatc_InterestPortionOfMinimumLeasePayments  
Total $ 0.5us-gaap_DebtAndCapitalLeaseObligations $ 0.8us-gaap_DebtAndCapitalLeaseObligations