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Stockholder's Equity - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 12 Months Ended |  |  | 6 Months Ended | 1 Months Ended |  |  |  |  |  |  | 6 Months Ended | 0 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  |  | 6 Months Ended | 3 Months Ended | 12 Months Ended | 6 Months Ended
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May 31, 2014 | May 31, 2013 | May 31, 2014 | May 31, 2013 | May 31, 2014 Performance Shares [Member] | May 31, 2014 Performance and Market-Based Vesting Condition Options [Member] | Nov. 30, 2013 Performance and Market-Based Vesting Condition Options [Member] | May 31, 2014 Restricted Common Shares [Member] | May 31, 2014 Employee Stock Incentive Plan [Member] | May 31, 2013 Employee Stock Incentive Plan [Member] | May 31, 2014 Employee Stock Incentive Plan [Member] | May 31, 2013 Employee Stock Incentive Plan [Member] | Feb. 28, 2014 Market-Based Vesting Condition Options [Member] | Nov. 30, 2013 Market-Based Vesting Condition Options [Member] | May 31, 2014 Market-Based Vesting Condition Options [Member] | May 31, 2014 Service-Based Vesting Condition Options [Member] | Nov. 30, 2013 Service-Based Vesting Condition Options [Member] | May 31, 2014 David Portnoy [Member] Restricted Common Shares [Member] | May 31, 2014 Mark Portnoy [Member] Restricted Common Shares [Member] | May 31, 2012 2012 Plan [Member] | May 31, 2014 2012 Plan [Member] | May 31, 2014 2012 Plan [Member] Service Based Option [Member] | Nov. 30, 2013 2012 Plan [Member] Service Based Option [Member] | May 31, 2014 2012 Plan [Member] Service Based Restricted Shares [Member] | May 31, 2014 2012 Plan [Member] Performance Based Options [Member] | Nov. 30, 2013 2012 Plan [Member] Performance Based Options [Member] | May 31, 2014 2012 Plan [Member] Market Based Options [Member] | Nov. 30, 2013 2012 Plan [Member] Market Based Options [Member] | May 31, 2014 2012 Plan [Member] Restricted Common Shares [Member] | May 31, 2014 2012 Plan [Member] Scenario, Forecast [Member] Restricted Common Shares [Member] December One Two Thousand Fourteen [Member] | May 31, 2014 2012 Plan [Member] Scenario, Forecast [Member] Restricted Common Shares [Member] December One Two Thousand Fifteen [Member] | Nov. 30, 2013 2012 Plan [Member] David Portnoy [Member] Restricted Common Shares [Member] | Nov. 30, 2013 2012 Plan [Member] Mark Portnoy [Member] Restricted Common Shares [Member] | May 31, 2014 2000 Plan [Member] | May 31, 2014 2000 Plan [Member] Employee Stock Incentive Plan [Member] | Nov. 30, 2013 2000 Plan [Member] Employee Stock Incentive Plan [Member] | May 31, 2014 2000 Plan [Member] Employee Stock Incentive Plan [Member] Minimum [Member] | May 31, 2014 2000 Plan [Member] Employee Stock Incentive Plan [Member] Maximum [Member] | May 31, 2014 2006 Plan [Member] | May 31, 2014 2006 Plan [Member] Employee Stock Incentive Plan [Member] | Nov. 30, 2013 2006 Plan [Member] Employee Stock Incentive Plan [Member] | May 31, 2014 Stock Option [Member] | May 31, 2013 Stock Option [Member] | Feb. 28, 2014 Stock Option [Member] Performance Shares [Member] | Nov. 30, 2013 Stock Option [Member] Performance Shares [Member] | May 31, 2013 Stock Option [Member] Service-Based Vesting Condition Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of share issued to option holder |  |  |  |  |  |  |  |  | 32,496 | 7,500 | 32,496 | 7,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,496 | 7,500 |  |  |
Stock options exercised, value |  |  |  |  |  |  |  |  | $ 48,665 | $ 11,825 | $ 48,665 | $ 11,825 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,250,000 |  |  |  |  | 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 |  |  |  |  |  | 40,000 | 640,000 |  |  |  |  |  |  |  |  | 1,016,016 | 1,112,260 |  |  |  |  | 400,000 | 400,000 | 129,729 | 261,488 | 400,000 | 87,162 | 200,000 |  |  |  |  |  |  | 2,500 | 12,500 |  |  |  | 653,516 | 739,760 |  |  |  |  |
Shares issued under stock incentive plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,621,621 |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  | 220,342 |  |  |  |  |  |
Increase in common stock reserved for issuance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted, Shares | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average grant date fair value of options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.67
Options exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,665 | 11,825 |  |  |
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |  |  |  |  | 44,000 |  |  | 15,000 |  |  |  |  |  |  | 6,200 |  |  |  |  |  | 25,000 |  |  |  |  |  |  |  | 120,000 |  |  |  |  | 25,000 |  |  |  |  | 25,000 |  |  |  |  |  |  |
Weighted-average period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 months 19 days |  |  |  |
Total fair value of shares vested |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73,000 |  |  |  |
Performance-based or market based vesting condition options | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 213,334 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 426,666 |
Options forfeited |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 |  |
Options remaining |  |  | 26,666 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 162,163 | 186,487 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 162,163 | 186,487 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share instruments newly issued under a share-based compensation plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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