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Share-Based Compensation Plans - Annualized weighted average values of the significant assumptions used to estimate fair value of options granted (Details) (USD $)
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Risk-free interest rate 2.45% 2.45%
Expected life in years 9 years 7 years
Expected volatility 82.00% 84.00%
Expected dividend yield $ 0 $ 0
Weighted average fair value of grants $ 1.60 $ 1.15