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Acquisition (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 28, 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 7.1
Acquired intangible assets $ 4.2
Minimum [Member]
 
Amortization period 2 years
Maximum [Member]
 
Amortization period 5 years