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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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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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 ($)	3 Months Ended		6 Months Ended
Stock-Based Compensation (Expenses) (Details) - USD ($)	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023	Oct. 31, 2023	Jul. 31, 2023
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 2,189,000	$ 1,268,000	$ 4,834,000	$ 2,172,000
CEO transition costs related to equity-classified stock-based awards	0	0	0	3,764,000
Total stock-based compensation expense before income tax benefit	2,189,000	1,268,000	4,834,000	5,936,000
Estimated Income tax benefit	(484,000)	(293,000)	(1,068,000)	(786,000)
Net stock-based compensation expense	1,705,000	975,000	3,766,000	5,150,000
Total remaining unrecognized compensation cost related to the unvested stock-based awards	11,864,000		11,864,000
Estimated forfeitures related to unvested stock-based awards	723,000		$ 723,000
Weighted average number of years net compensation cost is expected to be recognized over			2 years 2 months 12 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	$ 12,000	19,000	$ 31,000	44,000
Number of stock-based awards outstanding at period end (in shares)	224,580		224,580		234,260	240,510
Performance shares
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 585,000	281,000	$ 942,000	355,000
RSUs and restricted stock
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	1,566,000	937,000	3,810,000	1,711,000
ESPP
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 26,000	31,000	$ 51,000	62,000
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)	224,580		224,580
Cost of sales
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 131,000	153,000	$ 413,000	311,000
Selling, general and administrative expenses
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	1,991,000	1,015,000	4,167,000	1,663,000
Research and development expenses
Stock-based Compensation Expenses
Stock-based compensation expense before CEO transition costs	$ 67,000	$ 100,000	$ 254,000	$ 198,000