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Note 13 - Business Segment Information (Tables)
 6 Months Ended
Jul. 31, 2017
Notes Tables  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
 
 
Three Months Ended
July 31,
 
 
Six Months Ended
July 31,
 
 
 
201
7
 
 
201
6
 
 
201
7
 
 
201
6
 
 
 
(in thousands)
 
 
(in thousands)
 
Revenue:
                                
North America
(1)
   $
35,156
     $
32,815
     $
68,526
     $
62,334
  
EMEA
   
22,227
      
19,835
      
43,108
      
39,627
  
Asia Pacific
    
12,967
      
12,137
      
25,133
      
23,817
  
Latin America
    
5,608
      
4,991
      
10,573
      
9,397
  
    $
75,958
     $
69,778
     $
147,340
     $
135,175