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Commitments and Contingencies (Details 1) (USD $)
In Thousands, unless otherwise specified
Jan. 03, 2015
Future minimum payments for manufacturing and supply commitments  
2015 $ 6,171us-gaap_ContractualObligationDueInNextTwelveMonths
2016 2,013us-gaap_ContractualObligationDueInSecondYear
2017 750us-gaap_ContractualObligationDueInThirdYear
Total contract manufacturing and supply commitments $ 8,934us-gaap_ContractualObligation