Stockholder's Equity - Additional Information (Detail) - USD ($)
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1 Months Ended |
3 Months Ended |
6 Months Ended |
12 Months Ended |
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Apr. 15, 2016 |
Nov. 30, 2013 |
May 31, 2012 |
May 31, 2016 |
Feb. 29, 2016 |
May 31, 2015 |
Feb. 28, 2015 |
May 31, 2016 |
May 31, 2015 |
Nov. 30, 2015 |
Nov. 26, 2014 |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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169,729
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169,729
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0
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| Options, exercised |
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0
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0
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| Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |
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$ 0
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$ 0
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| Shares granted during period |
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169,729
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| Common stock, par value |
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$ 0.01
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$ 0.01
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$ 0.01
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| Share distribution period |
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20 days
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| Common shares exchange ratio |
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One Common Share per Right
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| Preferred Stock, redemption price Per Share |
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$ 0.01
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$ 0.01
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| Market price for common stock, percentage |
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50.00%
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| Assets sale percentage |
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50.00%
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| Rights expiration date |
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Dec. 05, 2017
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| Preferred Stock Rights Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock, par value |
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$ 0.01
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| Terms for right to purchasing preferred stock |
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Each Right represents the right to purchase from the Company one one-thousandth (1/1,000) of a share of Series A Junior Participating Preferred Stock (the "Preferred Shares"), subject to adjustment as provided in the Rights Agreement. This fraction of a Preferred Share is substantially similar to a Common Share, in that the Rights Agreement provides for each Preferred Share to have the voting, liquidation and dividend rights that are equivalent to 1,000 times the rights of a Common Share.
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| 2006 Plan [Member] | Employee Stock Incentive Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock for issuance pursuant to stock options or restricted stock |
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1,000,000
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1,000,000
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| Option issued |
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566,430
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566,430
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566,430
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| Shares issued under stock incentive plan |
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256,179
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256,179
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| 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock for issuance pursuant to stock options or restricted stock |
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1,500,000
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1,500,000
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| 2012 Plan [Member] | Employee Stock Incentive Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Increase in common stock reserved for issuance |
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2,500,000
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| Service Based Stock Options [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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569,729
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400,000
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| Service Based Restricted Shares [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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129,729
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129,729
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| Performance Based Options [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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278,948
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203,403
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| Market Based Options [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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116,240
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116,240
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| Service-Based Vesting Condition Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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169,729
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| Options, exercised |
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0
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| Stock option activity for options |
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1,136,159
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1,136,159
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968,930
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| Service-Based Vesting Condition Options [Member] | 2006 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |
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$ 204,000
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$ 204,000
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| Service-Based Vesting Condition Options [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |
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$ 204,000
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$ 204,000
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| Performance Shares [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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0
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0
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| Market-Based Vesting Condition Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
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0
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0
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| Performance and Market-Based Vesting Condition Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock option activity for options |
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0
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0
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0
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0
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| Restricted Common Shares [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |
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$ 0
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$ 0
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| Description of minimum requirement to be satisfied by employee for additional restricted common share |
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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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| Restricted Common Shares [Member] | David Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock for issuance pursuant to stock options or restricted stock |
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186,487
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186,487
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| Additional restricted common shares to be granted |
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186,487
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| Number of share issued to option holder |
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118,062
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93,244
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| Restricted Common Shares [Member] | Mark Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock for issuance pursuant to stock options or restricted stock |
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162,163
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162,163
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| Additional restricted common shares to be granted |
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162,163
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| Number of share issued to option holder |
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102,663
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81,082
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| Restricted Common Shares [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation, percentage of vesting upon grant |
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33.30%
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| Restricted Common Shares [Member] | 2012 Plan [Member] | December One Two Thousand Fourteen [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation, percentage of vesting upon grant |
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33.30%
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| Restricted Common Shares [Member] | 2012 Plan [Member] | December One Two Thousand Fifteen [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation, percentage of vesting upon grant |
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33.30%
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| Restricted Common Shares [Member] | 2012 Plan [Member] | David Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares granted during period |
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70,270
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| Restricted Common Shares [Member] | 2012 Plan [Member] | Mark Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares granted during period |
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59,459
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| Restricted Common Shares [Member] | Selling, General and Administrative Expenses [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation vested period fair value |
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$ 200,000
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| Employee Stock Incentive Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation cost related to non-vested share-based compensation arrangements granted |
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$ 142,000
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$ 142,000
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| Description of minimum requirement to be satisfied by employee for additional common share |
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In addition, if David Portnoy and Mark Portnoy are employed by the Company on November 30, 2017, then no later than February 28, 2018, the Company will grant up to an additional 186,487 and 162,163 qualified options of common stock, respectively, based on similar performance thresholds, as defined in the 2016 Employment Agreements.
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| Employee Stock Incentive Plan [Member] | David Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock for issuance pursuant to stock options or restricted stock |
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186,487
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186,487
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| Increase in common stock reserved for issuance |
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186,487
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| Employee Stock Incentive Plan [Member] | Mark Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock for issuance pursuant to stock options or restricted stock |
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162,163
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162,163
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| Increase in common stock reserved for issuance |
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162,163
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| Employee Stock Incentive Plan [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation, percentage of vesting upon grant |
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33.30%
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| Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | December 1, 2016 [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation, percentage of vesting upon grant |
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33.30%
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| Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | November 30, 2017 [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation, percentage of vesting upon grant |
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33.30%
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| Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | David Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
70,270
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| Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Mark Portnoy [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted, Shares |
59,459
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| Employee Stock Incentive Plan [Member] | Selling, General and Administrative Expenses [Member] | 2012 Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share based compensation vested period fair value |
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$ 97,000
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| Stockholder Rights Agreement [Member] | Minimum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Acquisition of common stock outstanding percentage |
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20.00%
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20.00%
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| Addition of common stock outstanding percentage |
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0.25%
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| Increase in common stock outstanding percentage |
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22.50%
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| Stock Option [Member] | Service-Based Vesting Condition Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted-average period |
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1 year 5 months 19 days
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| Total fair value of shares vested |
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$ 147,000
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