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11. QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)
 12 Months Ended
Feb. 28, 2017
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Information [Text Block]
11.     QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

The following is a summary of the quarterly results of operations for the years ended February 28, 2017 and February 29, 2016.

                     
Basic
    
Diluted
  
   
Net
                
Earnings
    
Earnings
  
   
Revenues
    
Gross Margin
    
Net Earnings
    
Per Share
    
Per Share
  
2017
                              
  First quarter
  
$
22,784,200
    
$
16,110,400
    
$
620,200
    
$
0.15
    
$
0.15
  
  Second quarter
    
25,893,000
      
18,394,600
      
318,500
      
0.08
      
0.08
  
  Third quarter
    
30,697,600
      
22,369,500
      
1,274,200
      
0.31
      
0.31
  
  Fourth quarter
    
27,253,300
      
21,140,100
    
 
648,000
      
0.16
      
0.16
  
Total year
  
$
106,628,100
    
$
78,014,600
    
$
2,860,900
    
$
0.70
    
$
0.70
  
                                         
2016
                                        
  First quarter
  
$
9,637,800
    
$
6,064,000
    
$
324,600
    
$
0.08
    
$
0.08
  
  Second quarter
    
12,606,800
      
8,029,400
      
644,400
      
0.16
      
0.16
  
  Third quarter
    
24,424,200
      
17,038,000
      
1,258,500
      
0.31
      
0.31
  
  Fourth quarter
    
16,949,500
      
11,992,700
      
(108,200
)
    
(0.03
)
    
(0.03
)
Total year
  
$
63,618,300
    
$
43,124,100
    
$
2,119,300
    
$
0.52
    
$
0.52