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, 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