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Operating Leases (Details Textual) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Operating Leased Assets [Line Items]      
Operating Leases, Rent Expense, Net, Total $ 0.70us-gaap_OperatingLeasesRentExpenseNet $ 0.07us-gaap_OperatingLeasesRentExpenseNet $ 1.00us-gaap_OperatingLeasesRentExpenseNet