XML 39 R53.htm IDEA: XBRL DOCUMENT v3.2.0.727
Stock-Based Compensation - Additional Information (Detail)
 6 Months Ended
Jun. 10, 2015
shares
Jun. 30, 2015
Period
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Aggregate number of shares of common stock reserved for future issuance   21,800,000
Outstanding options and other stock based awards   14,100,000
Employee Stock Purchase Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Aggregate number of shares of common stock reserved for future issuance   1,784,130
Increase in shares of common stock authorized for issuance 1,500,000  
Employee Stock Purchase Plan, offering period   12 months
Number of purchase periods within each offering period | Period   2
Stock-based compensation, option to be granted at percentage of fair value of common stock   85.00%
2008 Equity Incentive Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Aggregate number of shares of common stock reserved for future issuance   7,700,000
Increase in shares of common stock authorized for issuance 5,000,000