Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Share-Based Compensation (Details)

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Stockholders' Equity and Share-Based Compensation (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 30, 2013
Dec. 29, 2012
Summary of stock option activity    
Options outstanding, Shares, Beginning 7,428,240  
Granted - Shares 10,000  
Exercised - Shares (17,226)  
Expired - Shares (23,684)  
Forfeited - Shares (25,418)  
Options outstanding, Shares, Ending 7,371,912 7,428,240
Vested and expected to vest, Shares, Ending 7,096,695  
Options exercisable, Shares, Ending 6,059,321  
Options Outstanding, Weighted Average Exercise Price, Beginning $ 5.13  
Granted - Weighted Average Exercise Price $ 1.46  
Exercised - Weighted Average Exercise Price $ 1.31  
Expired - Weighted Average Exercise Price $ 6.88  
Forfeited - Weighted Average Exercise Price $ 4.08  
Options Outstanding, Weighted Average Exercise Price, Ending $ 5.14 $ 5.13
Vested and expected to vest, Weighted Average Exercise Price, Ending $ 5.16  
Options exercisable, Weighted Average Exercise Price, Ending $ 5.13  
Options Outstanding, Weighted Average Remaining Contractual Term (in years), Beginning 5 years 10 months 10 days 6 years 2 months 23 days
Options Outstanding, Weighted Average Remaining Contractual Term (in years), Ending 5 years 10 months 10 days 6 years 2 months 23 days
Vested and expected to vest, Weighted Average Remaining Contractual Term (in years), Ending 5 years 9 months 0 days  
Options exercisable, Weighted Average Remaining Contractual Term (in years), Ending 5 years 3 months 11 days  
Options outstanding, Aggregate Intrinsic Value, Ending     
Vested and expected to vest, Aggregate Intrinsic Value, Ending     
Options exercisable, Aggregate Intrinsic Value, Ending