Summary of Weighted-Average Grant-Date Fair Value of Options, Total Intrinsic Value of Options Exercised, and Cash Receipts from Options Exercised (Detail) - USD ($)	12 Months Ended
Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023
Share-Based Payment Arrangement [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 1,707,000	$ 2,946,000	$ 169,000
Stock option exercises & other		6,902,000	973,000
Expected forfeiture rate	12.00%
Stock Issued During Period, Value, Stock Options Exercised	$ 1,734,000	$ 6,907,000	$ 973,000
Stock option, aggregate intrinsic Value	$ 2,008,202
Granted	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	74,816
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	24,862
Expired	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	126,171	225,849
Options exercisable at end of Period	126,171
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 26.42	$ 25.81
Options exercisable at end of Period	26.42
Granted	0
Exercised	23.09
Forfeited	30.85
Expired	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding	$ 2,008,202
Option Outstanding weighted average remaining term	1 year 3 months 18 days
Option exercisable weighted average remaining term	1 year 3 months 18 days

Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Forfeiture Rate

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Expired

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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Value of stock issued as a result of the exercise of stock options.

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