Quarterly report pursuant to Section 13 or 15(d)

SHAREHOLDERS' EQUITY, Stock Option Activity (Details)

v3.20.4
SHAREHOLDERS' EQUITY, Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Sep. 23, 2020
Nov. 30, 2020
Nov. 30, 2019
Aug. 31, 2020
Aug. 30, 2020
2014 Equity Plan [Member]          
Shareholders' Equity [Abstract]          
Shares reserved for issuance (in shares)   1,600,000      
Shares available for grant (in shares)   979,382     1,088,500
2004 Incentive Plan and 2014 Equity Plan [Member]          
Number of Options [Roll Forward]          
Outstanding, beginning of period (in shares)   661,500      
Granted (in shares)   115,000      
Net settlement exercised (in shares)   (18,000) 0    
Outstanding, end of period (in shares)   758,500   661,500  
Options exercisable (in shares)   540,167      
Weighted Average Exercise Price [Roll Forward]          
Outstanding, beginning of period (in dollars per share)   $ 7.23      
Granted (in dollars per share)   9.00      
Net settlement exercised (in dollars per share)   3.04      
Outstanding, end of period (in dollars per share)   7.59   $ 7.23  
Options exercisable (in dollars per share)   $ 6.73      
Stock Options [Abstract]          
Weighted average remaining contractual term   6 years 7 months 10 days   6 years 2 months 1 day  
Weighted average remaining contractual term, options exercisable   5 years 6 months 11 days      
Approximate aggregate intrinsic value, outstanding   $ 1,670   $ 1,831  
Approximate aggregate intrinsic value, options exercisable   $ 1,608      
Weighted average grant-date fair value (in dollars per share)   $ 3.78      
Shares issued (in shares)   12,118      
Options cancelled (in shares)   5,882      
2004 Incentive Plan and 2014 Equity Plan [Member] | Employee [Member]          
Number of Options [Roll Forward]          
Granted (in shares) 85,000        
Stock Options [Abstract]          
Vesting period 5 years        
Weighted average grant-date fair value (in dollars per share) $ 3.93        
2004 Incentive Plan and 2014 Equity Plan [Member] | Employee [Member] | Maximum [Member]          
Stock Options [Abstract]          
Expiration period 10 years        
2004 Incentive Plan and 2014 Equity Plan [Member] | Executive Officer [Member]          
Number of Options [Roll Forward]          
Granted (in shares) 30,000        
Stock Options [Abstract]          
Vesting period 3 years        
Weighted average grant-date fair value (in dollars per share) $ 3.37        
2004 Incentive Plan and 2014 Equity Plan [Member] | Executive Officer [Member] | Maximum [Member]          
Stock Options [Abstract]          
Expiration period 10 years