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Note 3 - Computation of Net (Loss) Income Per Share (Tables)
 6 Months Ended
Jul. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
Six Months Ended
  
   
July 31,
    
July 31,
  
   
201
9
    
201
8
    
201
9
    
201
8
  
   
(in thousands, except per share data)
    
(in thousands, except per share data)
  
Net (loss) income
   $
(13,250
)
   $
1,113
     $
(16,484
)
   $
2,510
  
Less: Dividends declared
    
(1,387
)
    
(1,372
)
    
(2,761
)
    
(2,731
)
Undistributed net loss
   $
(14,637
)
   $
(259
)
   $
(19,245
)
   $
(221
)
                                 
Net
(loss) income
per share – Class A Common Stock
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Dividends declared
   $
1,191
     $
1,176
     $
2,370
     $
2,340
  
Allocation of undistributed net loss
    
(12,570
)
    
(222
)
    
(16,522
)
    
(190
)
Net (loss) income attributable to Class A common stock
   $
(11,379
)
   $
954
     $
(14,152
)
   $
2,150
  
                                 
Weighted average shares of Class A common stock outstanding—
basic
    
16,465
      
16,266
      
16,417
      
16,173
  
Weighted average potential shares of Class A common stock
    
—
      
1,661
      
—
      
1,713
  
Weighted average shares of Class A common stock and potential common shares outstanding—
diluted
    
16,465
      
17,927
      
16,417
      
17,886
  
                                 
Basic net (loss) income per Class A common share
   $
(0.69
)
   $
0.06
     $
(0.86
)
   $
0.13
  
Diluted net (loss) income per Class A common share
   $
(0.69
)
   $
0.05
     $
(0.86
)
   $
0.12
  
                                 
Net
(loss) income
per share – Class B Common Stock
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Dividends declared
   $
196
     $
196
     $
391
     $
391
  
Allocation of undistributed net loss
    
(2,067
)
    
(37
)
    
(2,723
)
    
(31
)
Net (loss) income attributable to Class B common stock
   $
(1,871
)
   $
159
     $
(2,332
)
   $
360
  
                                 
Weighted average shares of Class B common stock outstanding—
basic
    
3,264
      
3,263
      
3,264
      
3,248
  
Weighted average potential shares of Class B common stock
    
—
      
171
      
—
      
177
  
Weighted average shares of Class B common stock and potential common shares outstanding—
diluted
    
3,264
      
3,434
      
3,264
      
3,425
  
                                 
Basic net (loss) income per Class B common share
   $
(0.57
)
   $
0.05
     $
(0.71
)
   $
0.11
  
Diluted net (loss) income per Class B common share
   $
(0.57
)
   $
0.05
     $
(0.71
)
   $
0.11
  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Three Months Ended
    
Six Months Ended
  
   
July 31,
    
July 31,
  
   
201
9
    
201
8
    
201
9
    
201
8
  
   
(in thousands)
    
(in thousands)
  
Class A
    
2,897
      
351
      
2,898
      
179
  
Class B
    
278
      
—
      
278
      
—