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Stock-Based Compensation (Overview) (Details) - shares | 3 Months Ended |
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Oct. 31, 2023 | Jul. 31, 2023
Stock options |  |
Stock-Based Awards Outstanding By Award Type (In Shares) |  |
Number of stock-based awards outstanding at period end (in shares) | 234,260 | 240,510
2000 Stock Incentive Plan |  |
2000 Stock Incentive Plan |  |
Aggregate maximum number of shares of common stock which may be issued under stock option plan (in shares) | 11,962,500 |
Aggregate net number of stock-based awards granted (in shares) | 11,466,709 |
Aggregate number of stock based awards expired and canceled (in shares) | 5,863,266 |
Aggregate number of stock-based awards exercised (in shares) | 8,780,323 |
Stock-Based Awards Outstanding By Award Type (In Shares) |  |
Number of total stock-based awards outstanding (in shares) | 2,686,386 |
2000 Stock Incentive Plan | Stock options |  |
2000 Stock Incentive Plan |  |
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 |
Percentage of a stockholder's voting power that limits the contractual term of an incentive stock-based award | 10.00% |
Maximum term for incentive stock-based awards granted to stockholders who own more than 10% of the voting power | 5 years |
Stock-Based Awards Outstanding By Award Type (In Shares) |  |
Number of stock-based awards outstanding at period end (in shares) | 234,260 |
2000 Stock Incentive Plan | Performance shares |  |
Stock-Based Awards Outstanding By Award Type (In Shares) |  |
Number of stock-based awards outstanding at period end (in shares) | 827,802 |
2000 Stock Incentive Plan | RSUs and restricted stock |  |
Stock-Based Awards Outstanding By Award Type (In Shares) |  |
Number of stock-based awards outstanding at period end (in shares) | 1,624,324 |
2001 Employee Stock Purchase Plan | ESPP |  |
2001 Employee Stock Purchase Plan |  |
Total number of common shares reserved for issuance under employee stock purchase plan (in shares) | 1,300,000 |
Discount rate from market value, on purchase date, offered to employees participating in the Employee Stock Purchase Plan (ESPP) | 85.00% |
Total number of shares of common stock issued to employees under employee stock purchase plan and through the end of the reporting period (in shares) | 1,011,305 |

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