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Note 13 - Business Segment Information (Tables)
 3 Months Ended
Apr. 30, 2017
Notes Tables  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
   
Three Months Ended
April 30,
  
   
201
7
    
201
6
  
Revenue:
  
(in thousands)
  
North America
(1)
   $
33,370
     $
29,519
  
EMEA
    
20,881
      
19,792
  
Asia Pacific
    
12,166
      
11,680
  
Latin America
    
4,965
      
4,406
  
    $
71,382
     $
65,397