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Stock-Based Compensation (Expenses) (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Oct. 31, 2022 | Oct. 31, 2021 | Jul. 31, 2022
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | $ 904,000 | $ 921,000 |
CEO transition costs related to equity-classified stock-based awards | 3,764,000 | 0 |
Total stock-based compensation expense before income tax benefit | 4,668,000 | 921,000 |
Estimated Income tax benefit | (493,000) | (193,000) |
Net stock-based compensation expense | 4,175,000 | 728,000 |
Total remaining unrecognized compensation cost related to the unvested stock-based awards | 11,988,000 |  |
Estimated forfeitures related to unvested stock-based awards | $ 812,000 |  |
Weighted average number of years net compensation cost is expected to be recognized over | 2 years 9 months 18 days |  |
Stock-based compensation capitalized and included in ending inventory | $ 48,000 |  | $ 48,000
Stock options |  |  |
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | $ 25,000 | 78,000 |
Number of stock-based awards outstanding at period end (in shares) | 474,020 |  | 483,480
Performance shares |  |  |
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | $ 74,000 | 349,000 |
RSUs and restricted stock |  |  |
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | 774,000 | 439,000 |
ESPP |  |  |
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | $ 31,000 | 55,000 |
Discount offered to employees participating in the ESPP as a percentage of market price | 15.00% |  |
2000 Stock Incentive Plan | Stock options |  |  |
Stock-based Compensation Expenses |  |  |
Number of stock-based awards outstanding at period end (in shares) | 474,020 |  |
2000 Stock Incentive Plan | Stock appreciation rights (SARs) |  |  |
Stock-based Compensation Expenses |  |  |
Number of stock-based awards outstanding at period end (in shares) | 0 |  | 0
Cost of sales |  |  |
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | $ 158,000 | 73,000 |
Selling, general and administrative expenses |  |  |
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | 648,000 | 772,000 |
Research and development expenses |  |  |
Stock-based Compensation Expenses |  |  |
Stock-based compensation expense before CEO transition costs | $ 98,000 | $ 76,000 |

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