v2.4.0.6
Share-Based Compensation (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 9 Months Ended 12 Months Ended
Jun. 29, 2012
Sep. 30, 2011
Summary of stock option activity    
Number of Shares outstanding - Beginning Balance 2,292  
Number of Shares, Exercised (153)  
Number of Shares, Canceled or expired (68)  
Number of Shares outstanding - Ending Balance 2,071 2,292
Number of Shares, Options vested and expected to vest as of June 29, 2012 1,968  
Number of Shares, Options vested and exercisable as of June 29, 2012 896  
Weighted-Average Exercise Price Per Share Outstanding - Beginning Balance $ 1.28  
Weighted-Average Exercise Price Per Share, Exercised $ 1.12  
Weighted-Average Exercise Price Per Share, Canceled or expired $ 1.48  
Weighted-Average Exercise Price Per Share outstanding - Ending Balance $ 1.27 $ 1.28
Weighted-Average Exercise Price Per Share, Options vested and expected to vest as of June 29, 2012 $ 1.27  
Weighted-Average Exercise Price Per Share, Options vested and exercisable as of June 29, 2012 $ 1.34  
Weighted- Average Remaining Contractual Term (in years), Beginning Balance 7 years 4 months 24 days 8 years 2 months 12 days
Weighted- Average Remaining Contractual Term (in years), Ending Balance 7 years 4 months 24 days 8 years 2 months 12 days
Weighted- Average Remaining Contractual Term (in years), Options vested and expected to vest as of June 29, 2012 7 years 4 months 24 days  
Weighted- Average Remaining Contractual Term (in years), Options vested and exercisable as of June 29, 2012 7 years 6 months  
Aggregate Intrinsic Value, Beginning Balance $ 32,662  
Aggregate Intrinsic Value, Ending Balance 35,676 32,662
Aggregate Intrinsic Value, Options vested and expected to vest as of June 29, 2012 33,892  
Aggregate Intrinsic Value, Options vested and exercisable as of June 29, 2012 $ 15,369