Annual report pursuant to Section 13 and 15(d)

SHAREHOLDERS' EQUITY, Equity Compensation Plan (Details)

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SHAREHOLDERS' EQUITY, Equity Compensation Plan (Details) - USD ($)
 12 Months Ended
Jan. 31, 2016
Aug. 31, 2018
Aug. 31, 2017
Aug. 31, 2016
2014 Equity Plan [Member]        
Stock Option Activity [Abstract]        
Reserved shares of common stock for issuance (in shares)   1,600,000    
Awards to purchase shares of common stock (in shares)   287,000    
Variable Assumptions Used in Fair Value Calculations [Abstract]        
Expected term   5 years 9 months 18 days 10 years 10 years
Risk-free interest rate   2.41% 1.84% 2.06%
Expected volatility   57.88% 57.77% 58.26%
Expected dividend yield   0.00% 0.00% 0.00%
Weighted average grant-date fair value (in dollars per share)   $ 4.41 $ 3.67 $ 2.89
2014 Equity Plan [Member] | President [Member]        
Stock Option Activity [Abstract]        
Expiration period   10 years    
Number of Options [Roll Forward]        
Granted (in shares)   50,000    
2014 Equity Plan [Member] | Non-employee Directors [Member]        
Stock Option Activity [Abstract]        
Expiration period   10 years 10 years  
Number of Options [Roll Forward]        
Granted (in shares) 36,000 32,500 32,500  
2014 Equity Plan [Member] | Senior Management [Member]        
Stock Option Activity [Abstract]        
Expiration period     10 years  
Number of Options [Roll Forward]        
Granted (in shares)     110,000  
2004 Incentive Plan and 2014 Equity Plan [Member]        
Stock Option Activity [Abstract]        
Options expired (in shares)   (2,500) (15,000)  
Variable Assumptions Used in Fair Value Calculations [Abstract]        
Weighted average grant-date fair value (in dollars per share)   $ 4.41    
Number of Options [Roll Forward]        
Outstanding, beginning of period (in shares)   465,500 338,000  
Granted (in shares)   82,500 142,500  
Exercised (in shares)   (10,000) 0 0
Forfeited or expired (in shares)   (2,500) (15,000)  
Outstanding, end of period (in shares)   535,500 465,500 338,000
Options exercisable (in shares)   379,688    
Weighted Average Exercise Price [Roll Forward]        
Outstanding, beginning of period (in dollars per share)   $ 4.88 $ 4.77  
Granted (in dollars per share)   8.05 5.47  
Exercised (in dollars per share)   7.50 0  
Forfeited or expired (in dollars per share)   7.50 7.88  
Outstanding, end of period (in dollars per share)   5.31 $ 4.88 $ 4.77
Options exercisable (in dollars per share)   $ 4.66    
Stock Options, Additional Disclosure [Abstract]        
Weighted average remaining contractual term   6 years 14 days 6 years 3 months 18 days 0 years
Weighted average remaining contractual term options exercisable   4 years 11 months 12 days    
Approximate aggregate intrinsic value   $ 3,180,990 $ 1,007,740 $ 0
Approximate aggregate intrinsic value options exercisable   $ 2,501,642    
2004 Incentive Plan and 2014 Equity Plan [Member] | Minimum [Member]        
Variable Assumptions Used in Fair Value Calculations [Abstract]        
Expected term   8 years    
2004 Incentive Plan and 2014 Equity Plan [Member] | Maximum [Member]        
Variable Assumptions Used in Fair Value Calculations [Abstract]        
Expected term   10 years