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Share Repurchase Plan - Additional Information (Detail) - $ / shares	3 Months Ended		159 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Nov. 30, 2024	Oct. 06, 2016	Apr. 08, 2015	Jun. 06, 2012	Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to repurchase					8,000,000	6,000,000	3,000,000	1,000,000
Share repurchase plan	open market purchases, privately negotiated block trades, unsolicited negotiated transactions, and/or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities and Exchange Commission
Treasury stock, common, shares	6,787,460		6,787,460	6,787,460
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury stock, common, shares	6,787,460		6,787,460
Repurchase agreement, purchase price per share	$ 0	$ 5.36	$ 3.66
Treasury Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased	0	31,808

X

- Definition

Number of shares authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

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+ References

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

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-Topic 505
-SubTopic 30
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Description of share repurchase program, including accounting treatment.

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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