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Stock-Based Compensation (Expenses) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2026 | Apr. 30, 2025 | Jan. 31, 2026 | Oct. 31, 2025 | Jul. 31, 2025
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs |  |  | $ 2,720,000 | $ 2,520,000 |  |  |
Stock-based compensation expense before income tax benefit | $ 1,181,000 | $ 1,195,000 | 2,720,000 | 2,520,000 |  |  |
Estimated Income tax benefit | 0 | (252,000) | 0 | (516,000) |  |  |
Net stock-based compensation expense | 1,181,000 | 943,000 | 2,720,000 | 2,004,000 |  |  |
Total remaining unrecognized compensation cost related to the unvested stock-based awards | 8,446,000 |  | 8,446,000 |  |  |  |
Estimated forfeitures related to unvested stock-based awards | 361,000 |  | $ 361,000 |  |  |  |
Weighted average number of years net compensation cost is expected to be recognized over |  |  | 2 years |  |  |  |
Stock-based compensation capitalized and included in ending inventory | 198,000 |  | $ 198,000 |  |  |  | $ 198,000
Stock options |  |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs | $ 0 | 6,000 | $ 0 | 26,000 |  |  |
Number of stock-based awards outstanding at period end (in shares) | 96,250 |  | 96,250 |  | 96,250 | 96,250 | 124,470
Performance shares |  |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs | $ 277,000 | 384,000 | $ 121,000 | 289,000 |  |  |
RSUs and restricted stock |  |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs | 893,000 | 794,000 | 2,574,000 | 2,165,000 |  |  |
ESPP |  |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs | $ 11,000 | 11,000 | $ 25,000 | 40,000 |  |  |
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) | 96,250 |  | 96,250 |  |  |  |
Cost of sales |  |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs | $ 51,000 | 99,000 | $ 165,000 | 299,000 |  |  |
Selling, general and administrative expenses |  |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs | 1,089,000 | 1,033,000 | 2,445,000 | 2,033,000 |  |  |
Research and development expenses |  |  |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |  |  |
Stock-based compensation expense before CEO transition costs | $ 41,000 | $ 63,000 | $ 110,000 | $ 188,000 |  |  |

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