Summary of Stock Option Activity (Detail)	12 Months Ended
Aug. 31, 2024 USD ($) $ / shares shares
Number of Stock Option Outstanding
Beginning Balance \| shares	629,407
Granted \| shares	0
Exercised \| shares	(287,791)
Forfeited \| shares	0
Expired \| shares	115,767
Ending Balance \| shares	225,849
Options exercisable at end of Period \| shares	225,849
Weighted Average Exercise Price
Beginning Balance \| $ / shares	$ 27.18
Granted \| $ / shares	0
Exercised \| $ / shares	24.57
Forfeited \| $ / shares	0
Expired \| $ / shares	36.35
Ending Balance \| $ / shares	25.81
Options exercisable at end of Period \| $ / shares	$ 25.81
Option Outstanding weighted average remaining term	2 years
Option exercisable weighted average remaining term	2 years
Stock option, aggregate intrinsic Value \| $	$ 3,485,432

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

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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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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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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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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