v2.4.0.6
Share-Based Compensation - Effects of Share-Based Compensation Expense Related to Share-Based Awards to Employees and Non-employees (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 28, 2012
Dec. 30, 2011
Components Of Salaries And Benefits [Line Items]    
Total stock-based compensation expense $ 1,623 $ 473
Cost of revenue [Member]
   
Components Of Salaries And Benefits [Line Items]    
Total stock-based compensation expense 317 30
Research and development [Member]
   
Components Of Salaries And Benefits [Line Items]    
Total stock-based compensation expense 372 98
Selling, general and administrative [Member]
   
Components Of Salaries And Benefits [Line Items]    
Total stock-based compensation expense $ 934 $ 345