Share Repurchase Plan - Additional Information (Detail) - $ / shares |
12 Months Ended | 108 Months Ended | ||||||
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Mar. 31, 2018 |
Nov. 30, 2020 |
Nov. 30, 2019 |
Nov. 30, 2020 |
Oct. 06, 2016 |
Apr. 08, 2015 |
Jun. 06, 2012 |
Dec. 31, 2011 |
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| 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, shares | 6,093,535 | 6,093,535 | 6,093,535 | |||||
| 2012 Stock Incentive Plan [Member] | ||||||||
| Equity, Class of Treasury Stock [Line Items] | ||||||||
| Number of shares repurchased | 292,449 | |||||||
| Common Stock [Member] | ||||||||
| Equity, Class of Treasury Stock [Line Items] | ||||||||
| Treasury stock, shares | 6,093,535 | 6,093,535 | ||||||
| Repurchase agreement, purchase price per share | $ 0.00 | $ 3.39 | $ 3.37 | |||||
| Number of shares repurchased | 0 | 292,449 | ||||||
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- Definition 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. No definition available.
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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. No definition available.
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Description of share repurchase program, including accounting treatment. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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