The estimated future forfeitures related to total unrecognized stock-based compensation cost.

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Share-Based Payment Arrangement, Expense, Before Equity Classified Stock-Based Awards

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The portion of stock-based compensation that is capitalized in ending inventory.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount, after tax, of expense for award under share-based payment arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Discount rate from fair value on purchase date that participants pay for shares.

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Number of options outstanding, including both vested and non-vested options.

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Stock-Based Compensation (Expenses) (Details) - USD ($)	3 Months Ended		9 Months Ended
Stock-Based Compensation (Expenses) (Details) - USD ($)	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024	Jan. 31, 2025	Oct. 31, 2024	Jul. 31, 2024
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs			$ 2,520,000	$ 5,238,000
Stock-based compensation expense before income tax benefit	$ 1,195,000	$ 404,000	2,520,000	5,238,000
Estimated Income tax benefit	(252,000)	(81,000)	(516,000)	(1,149,000)
Net stock-based compensation expense	943,000	323,000	2,004,000	4,089,000
Total remaining unrecognized compensation cost related to the unvested stock-based awards	6,023,000		6,023,000
Estimated forfeitures related to unvested stock-based awards	459,000		$ 459,000
Weighted average number of years net compensation cost is expected to be recognized over			1 year 9 months 18 days
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	$ 6,000	11,000	$ 26,000	42,000
Number of stock-based awards outstanding at period end (in shares)	125,470		125,470		135,690	141,190	141,190
Performance shares
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 384,000	(662,000)	$ 289,000	280,000
RSUs and restricted stock
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	794,000	1,040,000	2,165,000	4,850,000
ESPP
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 11,000	15,000	$ 40,000	66,000
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)	125,470		125,470
Cost of sales
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 99,000	67,000	$ 299,000	480,000
Selling, general and administrative expenses
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	1,033,000	313,000	2,033,000	4,480,000
Research and development expenses
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 63,000	$ 24,000	$ 188,000	$ 278,000