Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Share-Based Compensation (Details)

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Stockholders' Equity and Share-Based Compensation (Details) (USD $)
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Summary of stock option activity    
Options outstanding, Shares, Beginning 7,454,718  
Granted - Shares 897,500  
Exercised - Shares (489,105)  
Expired - Shares (228,206)  
Forfeited - Shares (206,667)  
Options outstanding, Shares, Ending 7,428,240 7,454,718
Vested and expected to vest, Shares, Ending 7,048,525  
Options exercisable, Shares, Ending 5,827,185  
Options Outstanding, Weighted Average Exercise Price, Beginning $ 5.03  
Granted - Weighted Average Exercise Price $ 4.02  
Exercised - Weighted Average Exercise Price $ 1.30  
Expired - Weighted Average Exercise Price $ 5.78  
Forfeited - Weighted Average Exercise Price $ 4.95  
Options Outstanding, Weighted Average Exercise Price, Ending $ 5.13 $ 5.03
Vested and expected to vest, Weighted Average Exercise Price, Ending $ 5.16  
Options exercisable, Weighted Average Exercise Price, Ending $ 5.12  
Options Outstanding, Weighted Average Remaining Contractual Term (in years), Beginning 6 years 2 months 23 days 6 years 1 month 2 days
Options Outstanding, Weighted Average Remaining Contractual Term (in years), Ending 6 years 2 months 23 days 6 years 1 month 2 days
Vested and expected to vest, Weighted Average Remaining Contractual Term (in years), Ending 6 years 29 days  
Options exercisable, Weighted Average Remaining Contractual Term (in years), Ending 5 years 6 months 18 days  
Options outstanding, Aggregate Intrinsic Value, Ending $ 273,450  
Vested and expected to vest, Aggregate Intrinsic Value, Ending 273,445  
Options exercisable, Aggregate Intrinsic Value, Ending $ 266,990