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Note 13 - Quarterly Information (Unaudited) (Tables)
 12 Months Ended
Jan. 31, 2019
Notes Tables  
Quarterly Financial Information [Table Text Block]
   
Quarters Ended
  
   
April 30
    
July 31
    
Oct. 31
    
Jan. 31
  
   
(in thousands, except per share data)
  
Fiscal
2019
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Total revenue
   $
86,190
     $
84,543
      
79,577
      
82,706
  
Total costs and expenses
    
84,381
      
82,817
      
77,103
      
79,142
  
Gross margin
    
45,123
      
44,107
      
42,216
      
45,686
  
Operating income
    
1,809
      
1,726
      
2,474
      
3,564
  
Net income
    
1,397
      
1,113
      
2,982
      
4,936
  
Basic net income per share
                                
Class A
   $
0.07
     $
0.06
      
0.16
      
0.26
  
Class B
    
0.06
      
0.05
      
0.13
      
0.22
  
Diluted net income per share
                                
Class A
   $
0.07
     $
0.05
      
0.14
      
0.24
  
Class B
    
0.06
      
0.05
      
0.12
      
0.21
  
 
Fiscal
2018
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Total revenue
   $
71,382
     $
75,958
     $
76,925
     $
80,753
  
Total costs and expenses
    
72,741
      
75,415
      
76,495
      
83,441
  
Gross margin
    
36,516
      
39,264
      
38,879
      
40,934
  
Operating (loss) income
    
(1,359
)
    
543
      
430
      
(2,688
)
Net loss
    
(2,571
)
    
(1,161
)
    
(161
)
    
(5,172
)
Basic net loss per share
                                
Class A
   $
(0.14
)
   $
(0.06
)
   $
(0.01
)
   $
(0.28
)
Class B
    
(0.12
)
    
(0.05
)
    
(0.01
)
    
(0.23
)
Diluted net loss per share
                                
Class A
   $
(0.14
)
   $
(0.06
)
   $
(0.01
)
   $
(0.28
)
Class B
    
(0.12
)
    
(0.05
)
    
(0.01
)
    
(0.23
)