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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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 ($)	3 Months Ended
Stock-Based Compensation (Expenses) (Details) - USD ($)	Oct. 31, 2024	Oct. 31, 2023	Jul. 31, 2024
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 155,000	$ 2,645,000
Stock-based compensation expense before income tax benefit	155,000	2,645,000
Estimated Income tax benefit	(20,000)	(584,000)
Net stock-based compensation expense	135,000	2,061,000
Total remaining unrecognized compensation cost related to the unvested stock-based awards	9,923,000
Estimated forfeitures related to unvested stock-based awards	$ 708,000
Weighted average number of years net compensation cost is expected to be recognized over	2 years 1 month 6 days
Stock-based compensation capitalized and included in ending inventory	$ 198,000		$ 198,000
Stock options
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 17,000	19,000
Number of stock-based awards outstanding at period end (in shares)	141,190		141,190
Performance shares
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ (397,000)	357,000
RSUs and restricted stock
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	521,000	2,244,000
ESPP
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 14,000	25,000
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)	141,190
Cost of sales
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 104,000	282,000
Selling, general and administrative expenses
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	(14,000)	2,176,000
Research and development expenses
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 65,000	$ 187,000