Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.19.2
Stockholders' Equity - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 21, 2018
Mar. 08, 2018
May 31, 2012
May 31, 2019
May 31, 2018
Feb. 28, 2017
May 31, 2019
May 31, 2018
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2017
Nov. 30, 2016
May 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares             1,500            
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted       $ 49,000     $ 49,000            
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 and fiscal year 2017. The Amendment states if Executive is employed by the Company on November 30, 2016 and November 30, 2017, then no later than February 28, 2017 and February 28, 2018, respectively, the Company will grant Executive up to 20,000 shares of restricted stock based on performance as set forth in the Amendment per each fiscal year.            
Plan modification description and terms             The options were issued under the Company's 2012 Stock Plan and will vest 1/3 upon grant, 1/3 on December 1, 2018 and the remaining 1/3 on November 30, 2019            
Shares earned paid in cash                     $ 444,000    
Stock compensation, number of shares opted to lump sum cash payment             30,000            
Unrecognized compensation cost related to non-vested options       39,000 $ 91,000   $ 39,000 $ 91,000          
Amended And Restated Employment Agreement [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation costs         0     0         $ 0
Second Amendment Agreement [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation costs         0     0         0
Unrecognized compensation cost related to non-vested options       9,000 19,000   9,000 19,000          
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    
Granted, Shares   23,636                      
Shares granted during period                     91,801 183,145  
Shares earned during period                     121,801    
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    
Granted, Shares   20,000                      
Shares granted during period                     75,915 159,257  
Shares earned during period                     105,915    
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              
Granted, Shares 8,000                        
Share based compensation options fair value             $ 19,000 9,000     $ 80,000    
Shares granted during period           19,620         14,729    
Optionee [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares             1,500            
Performance And Market Based Vesting Condition Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted       $ 90,900 $ 73,550   $ 90,900 73,550          
Share based compensation options fair value             $ 161,000 0          
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       370,000     370,000     444,000      
Shares issued under stock incentive plan       0     0            
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       0     0            
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 options fair value             $ 100,000 $ 48,000          
Service Based Stock Options [Member] | 2012 Plan [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares             621,365            
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             823,300            
Market Based Options [Member] | 2012 Plan [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares             116,218            
Service-Based Vesting Condition Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares       1,500 51,636   1,500 51,636          
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       $ 49,000     $ 49,000            
Performance And Market Based Vesting Condition Options [Member] | David Portnoy [Member] | Share-based Compensation Award, Tranche One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares granted during period                   47,273      
Performance And Market Based Vesting Condition Options [Member] | Mark Portnoy [Member] | Share-based Compensation Award, Tranche One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares granted during period                   40,000      
Performance And Market Based Vesting Condition Options [Member] | Oleg Mikulinksy [Member] | Share-based Compensation Award, Tranche Two [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares granted during period             8,000            
Performance And Market Based Vesting Condition Options [Member] | 2018 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       $ 9,600 $ 6,750   $ 9,600 $ 6,750          
Performance And Market Based Vesting Condition Options [Member] | Selling, General and Administrative Expenses [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Fair value adjustment             66,000 0          
Performance And Market Based Vesting Condition Options [Member] | Selling, General and Administrative Expenses [Member] | Share-based Compensation Award, Tranche One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share based compensation options fair value             90,900 73,550          
Performance And Market Based Vesting Condition Options [Member] | Selling, General and Administrative Expenses [Member] | Share-based Compensation Award, Tranche Two [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share based compensation options fair value             9,600 6,750          
Market-Based Vesting Condition Options [Member] | Share-based Compensation Award, Tranche Two [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share based compensation options fair value             $ 16,000 $ 0          
Shares forfeited during period             4,444            
Market-Based Vesting Condition Options [Member] | Scenario, Forecast [Member] | Share-based Compensation Award, Tranche Two [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares forfeited during period                 2,666        
Market-Based Vesting Condition Options [Member] | David Portnoy [Member] | Share-based Compensation Award, Tranche One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares forfeited during period             26,243            
Market-Based Vesting Condition Options [Member] | David Portnoy [Member] | Scenario, Forecast [Member] | Share-based Compensation Award, Tranche One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares forfeited during period                 15,756        
Market-Based Vesting Condition Options [Member] | Mark Portnoy [Member] | Share-based Compensation Award, Tranche One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares forfeited during period               22,222          
Market-Based Vesting Condition Options [Member] | Mark Portnoy [Member] | Scenario, Forecast [Member] | Share-based Compensation Award, Tranche One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares forfeited during period                 13,332        
Market-Based Vesting Condition Options [Member] | Selling, General and Administrative Expenses [Member] | Share-based Compensation Award, Tranche Two [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share based compensation options fair value             $ 6,000 $ 0          
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         $ 0     $ 0         $ 0
Share based compensation options fair value                     $ 756,000    
Stock Option [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of share issued to option holder       0 1,000   2,500 2,250          
Options exercised       $ 0 $ 2,670   $ 5,700 $ 4,920          
Stock Option [Member] | Service-Based Vesting Condition Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Weighted-average period             52 years            
Total fair value of shares vested             $ 60,000