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Stock-Based Compensation (Expenses) (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 12, 2024 shares | Dec. 31, 2021 director | Jul. 31, 2024 USD ($) shares | Jul. 31, 2023 USD ($) shares | Jul. 31, 2022 USD ($) shares | Jul. 31, 2021 shares
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | $ 6,096,000 | $ 10,107,000 | $ 7,767,000 |
CEO transition costs related to equity-classified stock-based awards |  |  | 0 | 3,764,000 | 7,388,000 |
Total stock-based compensation expense before income tax benefit |  |  | 6,096,000 | 13,871,000 | 15,155,000 |
Estimated income tax benefit |  |  | (1,298,000) | (2,552,000) | (2,260,000) |
Net stock-based compensation expense |  |  | 4,798,000 | $ 11,319,000 | $ 12,895,000 |
Total remaining unrecognized compensation cost related to the unvested stock-based awards |  |  | 6,183,000 |  |  |
Estimated forfeitures related to unvested stock-based awards |  |  | $ 687,000 |  |  |
Weighted average number of years net compensation cost is expected to be recognized over |  |  | 1 year 10 months 24 days |  |  |
Stock-based compensation capitalized and included in ending inventory |  |  | $ 198,000 |  |  |
Number of stock-based awards outstanding at period end (in shares) | shares |  |  | 141,190 | 240,510 | 483,480 | 1,073,435
Stock-based compensation related to retirement of Board of Directors |  |  |  | $ 827,000 |  |
Number of retired Board of Directors | director |  | 3 |  |  |  |
Stock options |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | $ 60,000 | 87,000 | $ 519,000 |
Performance shares |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | 480,000 | 973,000 | 1,136,000 |
RSUs, restricted stock, share units and other stock-based awards |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | 5,477,000 | 8,926,000 | 5,912,000 |
ESPP |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | $ 79,000 | $ 121,000 | 200,000 |
Discount offered to employees participating in the ESPP as a percentage of market price |  |  | 15.00% |  |  |
RSU and Performance Shares |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, forfeited in period (in shares) | shares | 581,021 |  |  |  |  |
2000 Stock Incentive Plan | Stock appreciation rights (SARs) |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Number of stock-based awards outstanding at period end (in shares) | shares |  |  | 0 | 0 |  |
2000 Stock Incentive Plan | Stock options |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Number of stock-based awards outstanding at period end (in shares) | shares |  |  | 141,190 |  |  |
Cost of sales |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | $ 778,000 | $ 1,110,000 | 692,000 |
Selling, general and administrative expenses |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | 4,777,000 | 7,960,000 | 6,312,000 |
Research and development expenses |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |
Stock-based compensation expense (benefit) before income tax benefit |  |  | $ 541,000 | $ 1,037,000 | $ 763,000 |

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