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Stockholders' Equity (Details 2)
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12 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2013
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Mar. 31, 2012
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Mar. 31, 2011
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Mar. 31, 2013
Stock options
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Mar. 31, 2012
Stock options
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Mar. 31, 2013
Restricted stock units
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Mar. 31, 2012
Restricted stock units
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Sep. 30, 2012
Restricted stock units
Senior vice president of customer service
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Mar. 31, 2013
1993 Incentive Stock Plan and 2000 Equity Incentive Plan
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Mar. 31, 2013
1993 Plan
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Mar. 31, 2013
2000 Plan
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Mar. 31, 2013
Non-qualified stock options
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Mar. 31, 2013
Non-qualified stock options
Non-qualified stock options issued prior to Fiscal 2008
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Sep. 30, 2012
Non-qualified stock options
Stock options
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Mar. 31, 2012
Non-qualified stock options
Stock options
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Mar. 31, 2013
Non-qualified stock options
Stock options
President and chief executive officer
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Mar. 31, 2013
Non-qualified stock options
Stock options
Executive vice president of sales and marketing
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Mar. 31, 2013
Non-qualified stock options
Stock options
Senior vice president of program management
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Mar. 31, 2013
Non-qualified stock options
Stock options
Senior vice president of human resources
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Mar. 31, 2013
Non-qualified stock options
Stock options
Senior vice president of customer service
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| Stockholders' equity | ||||||||||||||||||||
| Number of shares of common stock reserved for issuance | 18,980,000 | 7,800,000 | 11,180,000 | |||||||||||||||||
| Number of shares available for future grant | 7,059,019 | |||||||||||||||||||
| Options outstanding (in shares) | 11,800,000 | 10,000,000 | 10,100,000 | 11,791,765 | 10,039,651 | 3,550,000 | ||||||||||||||
| Options granted (in shares) | 1,958,330 | 3,050,000 | 250,000 | 250,000 | 2,000,000 | 850,000 | 250,000 | 200,000 | 250,000 | |||||||||||
| Restricted stock units outstanding (in shares) | 1,500,000 | 1,100,000 | 1,500,000 | 1,467,096 | 1,143,262 | 62,500 | ||||||||||||||
| 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 of awards after issuance date | 1 year | |||||||||||||||||||
| Vesting period after one year of grant | 48 months | |||||||||||||||||||
| Vesting period | 4 years | |||||||||||||||||||
| Contractual term | 10 years | |||||||||||||||||||