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Stockholders' Equity - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 15, 2016 | May 31, 2012 | May 31, 2017 | Feb. 28, 2017 | May 31, 2016 | Feb. 29, 2016 | May 31, 2017 | May 31, 2016 | Nov. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  | 0 |  | 169,729 |  | 0 | 169,729 |
Shares granted during period |  |  |  |  |  |  | 0 |  |
Description on second amendment to employment agreement |  |  |  | The Amendment provides for the grant of shares of the Company's common stock based on certain performance measures being attained by the Company during fiscal year 2016. The Amendment states if Executive is employed by the Company on November 30, 2016, then no later than February 28, 2017, the Company will grant Executive up to 20,000 shares of restricted stock based on performance as set forth in the Amendment. |  |  |  |  |
Amended And Restated Employment Agreement [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs |  |  | $ 0 |  |  |  | $ 0 |  |
Second Amendment Agreement [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs |  |  | $ 0 |  |  |  | $ 0 |  |
David Portnoy [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares granted during period | 186,487 |  |  | 183,145 |  |  |  |  |
Mark Portnoy [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares granted during period | 162,163 |  |  | 159,257 |  |  |  |  |
Oleg Mikulinksy [Member] | Second Amendment Agreement [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  |  | 20,000 |  |  |  |  |
Shares granted during period |  |  |  | 19,620 |  |  |  |  |
2006 Plan [Member] | Employee Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  | 1,000,000 |  |  |  | 1,000,000 |  |
Option issued |  |  | 540,500 |  |  |  | 540,500 |  | 572,281
Shares issued under stock incentive plan |  |  | 231,929 |  |  |  | 231,929 |  |
2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  | 1,500,000 |  |  |  | 1,500,000 |  |
Shares issued under stock incentive plan |  |  | 1,043,332 |  |  |  | 1,043,332 |  |
2012 Plan [Member] | Employee Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Increase in common stock reserved for issuance |  | 2,500,000 |  |  |  |  |  |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share based compensation vested period fair value |  |  |  | $ 1,252,000 |  |  |  |  |
Selling, General and Administrative Expenses [Member] | Second Amendment Agreement [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share based compensation vested period fair value |  |  |  | $ 78,000 |  |  |  |  |
Restricted Common Shares [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |  |  | $ 362,000 |  | $ 0 |  | $ 362,000 | $ 0 |
Compensation cost recognized |  |  |  |  |  |  | $ 362,000 |  |
Restricted Common Shares [Member] | David Portnoy [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  | 186,487 |  |  |  | 186,487 |  |
Number of share issued to option holder |  |  |  |  |  | 118,062 |  |  |
Restricted Common Shares [Member] | Mark Portnoy [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  | 162,163 |  |  |  | 162,163 |  |
Number of share issued to option holder |  |  |  |  |  | 102,663 |  |  |
Service-Based Vesting Condition Options [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  | 0 |  |
Stock option activity for options |  |  | 1,110,229 |  |  |  | 1,110,229 |  | 1,142,010
Service-Based Vesting Condition Options [Member] | 2006 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |  |  | $ 91,000 |  |  |  | $ 91,000 |  |
Service-Based Vesting Condition Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |  |  | $ 91,000 |  |  |  | $ 91,000 |  |
Performance Shares [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  | 0 |  | 0 |  | 0 | 0 |
Market-Based Vesting Condition Options [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  | 0 |  | 0 |  | 0 | 0 |
Service Based Stock Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  | 569,729 |  |
Service Based Restricted Shares [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  | 129,729 |  |
Performance Based Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  | 640,970 |  |
Market Based Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  | 116,240 |  |
Performance and Market-Based Vesting Condition Options [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option activity for options |  |  | 0 |  | 0 |  | 0 | 0 |
Employee Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |  |  | $ 62,000 |  |  |  | $ 62,000 |  |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share based compensation, percentage of vesting upon grant |  |  |  |  |  |  | 33.30% |  |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | December 1, 2016 [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share based compensation, percentage of vesting upon grant |  |  |  |  |  |  | 33.30% |  |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | November 30, 2017 [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share based compensation, percentage of vesting upon grant |  |  |  |  |  |  | 33.30% |  |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | David Portnoy [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares granted during period | 70,270 |  |  |  |  |  |  |  |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Mark Portnoy [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares granted during period | 59,459 |  |  |  |  |  |  |  |
Employee Stock Incentive Plan [Member] | Selling, General and Administrative Expenses [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share based compensation vested period fair value |  |  |  |  |  |  | $ 182,000 |  |
Stock Option [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of share issued to option holder |  |  | 7,500 |  |  |  | 26,781 |  |
Options exercised |  |  | $ 17,900 |  | $ 0 |  | $ 51,396 | $ 0 |
Stock Option [Member] | Service-Based Vesting Condition Options [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted-average period |  |  |  |  |  |  | 6 months 10 days |  |
Total fair value of shares vested |  |  |  |  |  |  | $ 45,000 |  |

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