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Earnings (loss) per Common Share - Additional Information (Detail)
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12 Months Ended | 3 Months Ended | |||||||
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Aug. 31, 2012
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Aug. 31, 2012
Restricted Stock [Member]
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Aug. 31, 2011
Restricted Stock [Member]
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Aug. 31, 2010
Restricted Stock [Member]
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Aug. 31, 2012
Stock Options [Member]
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Aug. 31, 2011
Stock Options [Member]
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Aug. 31, 2010
Stock Options [Member]
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Aug. 31, 2011
Series B Voting Convertible Preferred Stock [Member]
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May 31, 2012
Convertible Common Stock [Member]
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| Earnings Per Share [Line Items] | |||||||||
| Shares included in weighted average common shares and equivalents computation of basic earnings per share | 100,000 | ||||||||
| Shares converted from Series B Preferred Stock into company's common stock | 1,000,000 | 1,000,000 | |||||||
| Antidilutive weighted-average restricted stock awards/ options excluded from the calculation of diluted earnings (loss) per share | 57,443 | 98,158 | 146,668 | 1,648,704 | 1,325,945 | 1,309,273 | |||