v2.4.0.6
Stock Option and RSU Award Activity under Stock Plans (Detail) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Shares Available for Grant    
Beginning Balance 52,318  
RSUs granted (28,603)  
Stock options exercised 0  
Stock options forfeited/cancelled 584  
RSUs forfeited and cancelled 4,385  
2012 Equity Incentive Plan shares authorized 25,000  
Ending Balance 53,684 52,318
Number of Shares    
Beginning Balance 258,539  
Stock options exercised (84,078)  
Stock options forfeited/cancelled (584)  
Ending Balance 173,877 258,539
Weighted Average Exercise Price    
Beginning Balance $ 0.47  
Stock options exercised $ 0.11  
Stock options forfeited/cancelled $ 0.62  
Ending Balance $ 0.65 $ 0.47
Weighted-Average Remaining Contractual Term    
Beginning Balance 4 years 29 days 4 years 4 months 17 days
Aggregate Intrinsic Value    
Beginning Balance $ 7,360 [1]  
Ending Balance $ 5,294 [1] $ 7,360 [1]
Outstanding RSUs    
Beginning Balance 378,772  
RSUs granted 28,603  
RSUs forfeited and cancelled (4,385)  
Ending Balance 402,990 378,772
Weighted Average Grant Date Fair Value    
Beginning Balance $ 6.83  
RSUs granted $ 36.04  
RSUs forfeited and cancelled $ 14.86  
Ending Balance $ 8.81 $ 6.83
[1] The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the assessed fair value of our common stock as of December 31, 2011 and the closing market price of our common stock as of June 30, 2012.