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Stockholder's Equity - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  |  |  |  |  |  | 9 Months Ended | 0 Months Ended |  | 9 Months Ended |  |  | 9 Months Ended | 12 Months Ended
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Aug. 31, 2014 | Aug. 31, 2013 | Aug. 31, 2014 | Aug. 31, 2013 | Aug. 31, 2014 Employee Stock Incentive Plan [Member] | Aug. 31, 2013 Employee Stock Incentive Plan [Member] | Aug. 31, 2014 Employee Stock Incentive Plan [Member] | Aug. 31, 2013 Employee Stock Incentive Plan [Member] | Aug. 31, 2014 Market-Based Vesting Condition Options [Member] | Nov. 30, 2013 Market-Based Vesting Condition Options [Member] | Aug. 31, 2014 Performance Shares [Member] | Aug. 31, 2014 Performance and Market-Based Vesting Condition Options [Member] | Nov. 30, 2013 Performance and Market-Based Vesting Condition Options [Member] | Aug. 31, 2014 Restricted Common Shares [Member] | Aug. 31, 2014 David Portnoy [Member] Restricted Common Shares [Member] | Aug. 31, 2014 Mark Portnoy [Member] Restricted Common Shares [Member] | Aug. 31, 2014 2000 Plan [Member] | Aug. 31, 2014 2000 Plan [Member] Employee Stock Incentive Plan [Member] | Nov. 30, 2013 2000 Plan [Member] Employee Stock Incentive Plan [Member] | Aug. 31, 2014 2000 Plan [Member] Employee Stock Incentive Plan [Member] Minimum [Member] | Aug. 31, 2014 2000 Plan [Member] Employee Stock Incentive Plan [Member] Maximum [Member] | Aug. 31, 2014 2012 Plan [Member] | Aug. 31, 2014 2012 Plan [Member] Service Based Option [Member] | Nov. 30, 2013 2012 Plan [Member] Service Based Option [Member] | Aug. 31, 2014 2012 Plan [Member] Service Based Restricted Shares [Member] | Aug. 31, 2014 2012 Plan [Member] Performance Based Options [Member] | Nov. 30, 2013 2012 Plan [Member] Performance Based Options [Member] | Aug. 31, 2014 2012 Plan [Member] Market Based Options [Member] | Nov. 30, 2013 2012 Plan [Member] Market Based Options [Member] | Aug. 31, 2014 2012 Plan [Member] Restricted Common Shares [Member] | Dec. 01, 2013 2012 Plan [Member] David Portnoy [Member] Restricted Common Shares [Member] | Dec. 01, 2013 2012 Plan [Member] Mark Portnoy [Member] Restricted Common Shares [Member] | May 31, 2012 2012 Plan [Member] Scenario, Previously Reported [Member] | May 31, 2012 2012 Plan [Member] Amendment [Member] | Aug. 31, 2014 2012 Plan [Member] Scenario, Forecast [Member] Restricted Common Shares [Member] December One Two Thousand Fourteen [Member] | Aug. 31, 2014 2012 Plan [Member] Scenario, Forecast [Member] Restricted Common Shares [Member] December One Two Thousand Fifteen [Member] | Aug. 31, 2014 2006 Plan [Member] | Aug. 31, 2014 2006 Plan [Member] Employee Stock Incentive Plan [Member] | Nov. 30, 2013 2006 Plan [Member] Employee Stock Incentive Plan [Member] | Aug. 31, 2014 Stock Option [Member] | Aug. 31, 2013 Stock Option [Member] | Aug. 31, 2014 Stock Option [Member] Performance Shares [Member] | Nov. 30, 2013 Stock Option [Member] Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of share issued to option holder |  |  |  |  | 13,750 | 2,500 | 46,246 | 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 46,246 | 10,000 |  |
Stock options exercised, value |  |  |  |  | $ 22,238 | $ 3,125 | $ 70,902 | $ 14,950 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 | 2,500,000 |  |  |  | 1,000,000 |  |  |  |  |
Term of options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period ranging from, date of grant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercisable period after termination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  |  |  |  | 640,000 |  |  |  |  | 2,500 | 12,500 |  |  |  | 400,000 | 400,000 | 129,729 | 261,488 | 400,000 | 87,162 | 200,000 |  |  |  |  |  |  |  |  | 585,597 | 739,760 |  |  |  |
Shares issued under stock incentive plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  | 1,621,621 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 274,511 |  |  |  |  |
Granted, Shares | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,902 | 14,950 |  |
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |  |  |  |  |  |  |  |  | 0 |  | 7,500 | 0 |  | 100,000 |  |  | 5,400 |  |  |  |  | 5,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,400 |  |  |  |  |  |
Weighted-average period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 months 22 days |  |  |
Total fair value of shares vested |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125,000 |  |  |
Performance-based or market based vesting condition options | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  | 213,334 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 426,666
Options forfeited |  |  |  |  |  |  |  |  | 213,334 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 426,666 |
Share based compensation recognized on achievement of performance targets |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expenses recognized without performance target achievement |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,270 | 59,459 |  |  |  |  |  |  |  |  |  |  |
Share based compensation, percentage of vesting upon grant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.33% |  |  |  |  | 33.33% | 33.33% |  |  |  |  |  |  |
Share based compensation vested period fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 80,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum restricted common shares granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 186,487 | 162,163 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of minimum requirement to be satisfied by employee for restricted common share |  |  |  |  |  |  |  |  |  |  |  |  |  | The Employment Agreements state if David Portnoy and Mark Portnoy are employed by the Company on November 30, 2014, then no later than February 15, 2015, the Company will grant up to 186,487 and 162,163 shares of restricted common shares, respectively, based on certain performance thresholds, as defined in the agreements. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional restricted common shares to be granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 186,487 | 162,163 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of minimum requirement to be satisfied by employee for additional restricted common share |  |  |  |  |  |  |  |  |  |  |  |  |  | In addition, if David Portnoy and Mark Portnoy are employed by the Company on November 30, 2015, then no later than February 15, 2016, the Company will grant up to an additional 186,487 and 162,163 shares of restricted common shares, respectively, based on similar performance thresholds, as defined in the agreements. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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