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Acquisition of BAM Labs, Inc. - Acquired Intangible Assets (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 09, 2015
Oct. 03, 2015
Acquisition of BAM Labs, Inc. [Line Items]    
Definite-lived intangible assets tax deductibility period 15 years  
Developed Technology Rights [Member] | BAM Labs, Inc. [Member]    
Acquisition of BAM Labs, Inc. [Line Items]    
Purchased intangible assets $ 13.6  
Estimated useful life   8 years