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Acquisition (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 27, 2014
Assets acquired and liabilities assumed $ 3.0
Held in escrow 0.3
Purchase price, common stock 1.0
Vesting pervision 4 years
Contingent consideration 8.0
Purchase price 7.6
Acquired intangible assets $ 4.1
Minimum [Member]
 
Amortization period 2 years
Maximum [Member]
 
Amortization period 5 years