Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.20.2
Stockholders' Equity - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 31, 2020
Feb. 27, 2020
May 31, 2019
May 21, 2018
Dec. 20, 2019
Aug. 30, 2019
May 31, 2012
May 31, 2020
May 31, 2019
May 31, 2020
May 31, 2019
Nov. 30, 2019
Nov. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares                 1,500 44,969 1,500    
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, 2020 and the remaining 1/3 on November 30, 2021.      
Shares earned paid in cash               $ 444,000          
Stock compensation, number of shares opted to lump sum cash payment               30,000          
David Portnoy [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares         23,636                
Shares earned during period               304,946          
Number of shares surrendered               157,472          
Payments Of Cash In Surrender Of Shares In Share Based Compensation Activities               $ 534,917          
Mark Portnoy [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares         20,000                
Shares earned during period               265,172          
Number of shares surrendered               134,977          
Payments Of Cash In Surrender Of Shares In Share Based Compensation Activities               $ 457,327          
Oleg Mikulinksy [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation cost related to non-vested options $ 11,500             $ 11,500   $ 11,500      
Oleg Mikulinksy [Member] | Second Amendment Agreement [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares       8,000                  
Shares granted during period               34,349          
Optionee [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares                   1,500      
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   1,000,000      
Option issued 305,000             305,000   305,000   325,000  
Shares issued under stock incentive plan 0             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   1,500,000      
Shares issued under stock incentive plan 622,510             622,510   622,510      
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]                          
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted $ 147,000             $ 147,000   $ 147,000      
Share based compensation options fair value                   73,000      
Selling, General and Administrative Expenses [Member] | 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 $ 86,000             86,000   86,000      
Share based compensation options fair value                   $ 86,000      
Selling, General and Administrative Expenses [Member] | Performance And 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                     $ 9,600    
Service Based Stock Options [Member] | 2012 Plan [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares 808,243   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   129,729                    
Performance Based Options [Member] | 2012 Plan [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares 530,851   823,300                    
Market Based Options [Member] | 2012 Plan [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares 116,218   116,218                    
Service-Based Vesting Condition Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares                   44,969      
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 $ 457,000             $ 457,000   $ 457,000      
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] | 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      
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]                          
Shares forfeited during period                       2,666  
Market-Based Vesting Condition Options [Member] | Share-based Compensation Award, Tranche Two [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares forfeited during period   1,333                   4,444  
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                       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                       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 $ 2,000                 $ 7,600      
Stock Option [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of share issued to option holder               0 0 20,000 2,500    
Options exercised               $ 0 $ 0 $ 41,000 $ 5,700    
Stock Option [Member] | Service-Based Vesting Condition Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted, Shares               0   44,969      
Weighted-average period                   1 year 10 days      
Total fair value of shares vested                   $ 335,000      
Non Qualified Stock Options [Member] | Performance And Market Based Vesting Condition Options [Member] | David Portnoy [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares granted during period           26,243              
Non Qualified Stock Options [Member] | Performance And Market Based Vesting Condition Options [Member] | Mark Portnoy [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares granted during period           22,222