Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 2)

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Stock-Based Compensation (Details 2) - shares
 1 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2015
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Mar. 31, 2015
Non-qualified stock options issued prior to Fiscal 2015          
Stockholders' equity          
Options granted (in shares)       3,050,000  
Stock options          
Stockholders' equity          
Options outstanding (in shares)   11,333,631   11,333,631 13,163,363
Options granted (in shares)   0 0 584,500  
Restricted stock units          
Stockholders' equity          
Granted (in shares)       1,563,256  
Restricted stock units outstanding (in shares)   2,497,829   2,497,829 1,868,574
2000 Plan          
Stockholders' equity          
Number of shares of common stock reserved for issuance   36,980,000   36,980,000  
Number of shares of common stock increased under amended and restated plan 9,000,000        
Number of shares available for future grant   12,033,179   12,033,179  
Vesting period       4 years  
Expiration Term       10 years  
2000 Plan | Stock options          
Stockholders' equity          
Portion vesting one year after the issuance date (as a percent)       25.00%  
Portion vesting on first day of each month after one year from the issuance date (as a percent)       2.083%  
Vesting period after one year of grant       48 months  
Non-qualified stock options | Non-qualified stock options issued prior to Fiscal 2015          
Stockholders' equity          
Options granted (in shares)       46,875  
Non-qualified stock options | Stock options          
Stockholders' equity          
Options granted (in shares)       3,300,000  
Granted (in shares)       250,000  
Non-qualified stock options | Stock options | Executive Vice President and Chief Executive Officer          
Stockholders' equity          
Options granted (in shares)       2,000,000  
Non-qualified stock options | Stock options | Executive Vice President of Sales and Marketing          
Stockholders' equity          
Options granted (in shares)       850,000  
Non-qualified stock options | Stock options | Vice President of Operations          
Stockholders' equity          
Options granted (in shares)       250,000  
Non-qualified stock options | Stock options | Former Senior Vice President of Human Resources          
Stockholders' equity          
Options granted (in shares)       200,000  
Non-qualified stock options | Restricted stock units          
Stockholders' equity          
Options granted (in shares)       46,875  
Non-qualified stock options | Restricted stock units | Vice President of Operations          
Stockholders' equity          
Options granted (in shares)       46,875