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Note 2 - Computation of Net (Loss) Income Per Share (Tables)
 6 Months Ended
Jul. 31, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
  
Three Months Ended
    
Six Months Ended
  
 
  
July 31,
   
July 31,
 
 
  
2016
    
2015
    
2016
    
2015
  
 
  
(in thousands, except per share data)
    
(in thousands, except per share data)
  
Net income (loss)
   $ 600     $ 1,631     $ (2,142
)
  $ 2,180  
Less: Dividends declared
     (1,326
)
     (1,310
)
     (2,642
)
     (2,609
)
Undistributed net (loss) income
   $ (726
)
   $ 321     $ (4,784
)
   $ (429
)
                                 
Net income
(loss)
per share – Class A Common Stock
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Dividends declared
   $ 1,134     $ 1,118     $ 2,257     $ 2,225  
Allocation of undistributed net (loss) income
     (621
)
     274       (4,086
)
     (365
)
Net income (loss) attributable to Class A common stock
   $ 513     $ 1,392     $ (1,829
)
   $ 1,860  
                                 
Weighted average shares of Class A common stock outstanding—
basic
     15,694       15,467       15,644       15,367  
Weighted average potential shares of Class A common stock
    586       794       —       793  
Weighted average shares of Class A common stock and potential common shares outstanding—
diluted
     16,280       16,261       15,644       16,160  
                                 
Basic net income (loss) per Class A common share
   $ 0.03     $ 0.09     $ (0.12
)
   $ 0.12  
Diluted net income (loss) per Class A common share
   $ 0.03     $ 0.09     $ (0.12
)
   $ 0.12  
                                 
Net income
(loss)
per share – Class B Common Stock
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Dividends declared
   $ 192     $ 192     $ 385     $ 384  
Allocation of undistributed net (loss) income
     (105
)
     47       (698
)
     (64
)
Net income (loss) attributable to Class B common stock
   $ 87     $ 239     $ (313
)
   $ 320  
                                 
Weighted average shares of Class B common stock outstanding—
basic
     3,205       3,201       3,204       3,198  
Weighted average potential shares of Class B common stock
    70       83       —       84  
Weighted average shares of Class B common stock and potential common shares outstanding—
diluted
     3,275       3,284       3,204       3,282  
                                 
Basic net income (loss) per Class B common share
   $ 0.03     $ 0.08     $ (0.10
)
   $ 0.10  
Diluted net income (loss) per Class B common share
   $ 0.03     $ 0.07     $ (0.10
)
   $ 0.10  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
 
  
Three Months
Ended
    
Six Months
Ended
  
 
  
July 31
,
   
July 31
,
 
 
  
2016
    
2015
    
2016
    
2015
  
 
  
(in thousands)
    
(in thousands)
  
Class A
     1,027       504       745       478  
Class B
     151       95       136       78