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Net Loss Per Share (Details)
3 Months Ended 9 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Sep. 28, 2014
Sep. 29, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 6,600,000 7,300,000 6,600,000 7,300,000
Warrant [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Warrants available to purchase (in shares) 4,205,000 4,200,000.0 4,200,000.0 4,200,000.0