Stock-Based Compensation - Overview (Details) - shares
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6 Months Ended |
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Jan. 31, 2016 |
Dec. 31, 2015 |
Oct. 31, 2015 |
Jul. 31, 2015 |
| Stock options |
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| Stock-Based Awards Outstanding By Award Type (In Shares) |
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| Number of stock-based option awards outstanding at period end |
2,350,258
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2,398,498
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2,119,683
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| Employee Stock Purchase Plan - ESPP |
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| 2001 Employee Stock Purchase Plan |
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| Increase in total common shares reserved for an issuance under the Company's ESPP requested by the Company |
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675,000
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| 2000 Stock Incentive Plan |
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| 2000 Stock Incentive Plan |
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| Aggregate maximum number of shares of common stock which may be issued under stock option plan |
8,962,500
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| Aggregate net number of stock-based awards granted |
7,718,350
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| Aggregate number of stock based awards expired and canceled |
3,124,811
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| Aggregate number of stock-based awards exercised |
5,143,687
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| Stock-Based Awards Outstanding By Award Type (In Shares) |
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| Number of total stock-based awards outstanding |
2,574,663
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| 2000 Stock Incentive Plan | Stock options |
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| 2000 Stock Incentive Plan |
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| Maximum term for grants of incentive and non-qualified stock-based awards, excluding incentive stock-based awards granted to stockholders who own more than 10% of the voting power |
10 years
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| Percentage of a stockholder's voting power that limits the contractual term of an incentive stock-based award |
10.00%
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| Maximum term for incentive stock-based awards granted to stockholders who own more than 10% of the voting power |
5 years
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| Stock-Based Awards Outstanding By Award Type (In Shares) |
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| Number of stock-based option awards outstanding at period end |
2,350,258
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| 2000 Stock Incentive Plan | Performance shares |
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| Stock-Based Awards Outstanding By Award Type (In Shares) |
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| Number of stock-based non-option awards outstanding at period end |
174,665
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| 2000 Stock Incentive Plan | RSUs and restricted stock |
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| Stock-Based Awards Outstanding By Award Type (In Shares) |
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| Number of stock-based non-option awards outstanding at period end |
41,237
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| 2000 Stock Incentive Plan | Share units |
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| Stock-Based Awards Outstanding By Award Type (In Shares) |
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| Number of stock-based non-option awards outstanding at period end |
8,503
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| 2001 Employee Stock Purchase Plan | Employee Stock Purchase Plan - ESPP |
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| 2001 Employee Stock Purchase Plan |
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| Discount rate from market value, on purchase date, offered to employees participating in the Employee Stock Purchase Plan (ESPP) |
85.00%
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| Total number of common shares reserved for issuance under employee stock purchase plan |
800,000
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| Total number of shares of common stock issued to employees under employee stock purchase plan and through the end of the reporting period |
609,184
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