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Note 2 - Computation of Net Income (Loss) Per Share (Tables)
 9 Months Ended
Oct. 31, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
 
Three Months Ended
 
 
Nine
Months Ended
 
 
 
October
31,
 
 
October
31,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
 
 
(in thousands, except per share data)
 
 
(in thousands, except per share data)
 
Net income (loss)
   $ 1,533     $ 2,586     $ (291
)
  $ 4,766  
Less: Dividends declared
     (1,328
)
     (1,313
)
     (3,970
)
     (3,922
)
Undistributed net income (loss)
   $ 205     $ 1,273     $ (4,261
)
   $ 844  
                                 
Net income (loss) per share – Class A Common Stock
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Dividends declared
   $ 1,136     $ 1,121     $ 3,393     $ 3,346  
Allocation of undistributed net income (loss)
     175       1,087       (3,638
)
     721  
Net income (loss) attributable to Class A common stock
   $ 1,311     $ 2,208     $ (245
)
   $ 4,067  
                                 
Weighted average shares of Class A common stock outstanding—
basic
     15,773       15,559       15,687       15,431  
Weighted average potential shares of Class A common stock
    829       749       —       777  
Weighted average shares of Class A common stock and potential common shares outstanding—
diluted
     16,602       16,308       15,687       16,208  
                                 
Basic net income (loss) per Class A common share
   $ 0.08     $ 0.14     $ (0.02
)
   $ 0.26  
Diluted net income (loss) per Class A common share
   $ 0.08     $ 0.14     $ (0.02
)
   $ 0.25  
                                 
Net income (loss) per share – Class B Common Stock
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Dividends declared
   $ 192     $ 192     $ 577     $ 576  
Allocation of undistributed net income (loss)
     30       186       (623
)
     123  
Net income (loss) attributable to Class B common stock
   $ 222     $ 378     $ (46
)
   $ 699  
                                 
Weighted average shares of Class B common stock outstanding—
basic
     3,206       3,203       3,205       3,200  
Weighted average potential shares of Class B common stock
    95       83       —       83  
Weighted average shares of Class B common stock and potential common shares outstanding—
diluted
     3,301       3,286       3,205       3,283  
                                 
Basic net income (loss) per Class B common share
   $ 0.07     $ 0.12     $ (0.01
)
   $ 0.22  
Diluted net income (loss) per Class B common share
   $ 0.07     $ 0.12     $ (0.01
)
   $ 0.21  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
 
 
Three Months Ended
 
 
Nine
Months Ended
 
 
 
October 31
,
 
 
October 31
,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
 
 
(in thousands)
 
 
(in thousands)
 
Class A
     1,135       640       1,029       490  
Class B
     180       120       151       92