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12. Earnings Per Share (Tables)
 6 Months Ended
Jul. 31, 2016
Earnings Per Share [Abstract]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] The following table sets forth the number of outstanding restricted stock awards and RSUs, net of forfeitures and vested shares, as of the fiscal period-end dates indicated:

   
July 31,
    
January 31,
  
   
2016
    
2016
  
             
Restricted shares
    
26
      
25
  
Restricted stock units
    
20
      
13
  
     
46
      
38
  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] The following table sets forth the computation of basic and diluted earnings per share:

   
Thirteen Weeks Ended
    
Twenty-Six Weeks Ended
  
   
July 31,
    
August 2,
    
July 31,
    
August 2,
  
   
2016
    
2015
    
2016
    
2015
  
                         
Net income
  
$
5,349
    
$
3,938
    
$
7,848
    
$
7,410
  
   Less: Unvested participating restricted stock dividends
    
3
      
3
      
5
      
3
  
            Net earnings allocated to unvested participating restricted stock
    
12
      
10
      
18
      
10
  
Earnings available for common shareholders
    
5,334
      
3,925
      
7,825
      
7,397
  
                                 
Weighted average shares outstanding for basic earnings per share
    
11,533
      
10,783
      
11,524
      
10,770
  
Dilutive effect of unvested restricted stock and RSU awards
    
21
      
23
      
24
      
26
  
   Weighted average shares outstanding for diluted earnings per share
    
11,554
      
10,806
      
11,548
      
10,796
  
                                 
Basic earnings per share
  
$
0.46
    
$
0.36
    
$
0.68
    
$
0.69
  
                                 
Diluted earnings per share
  
$
0.46
    
$
0.36
    
$
0.68
    
$
0.69