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Segment Reporting (Tables)
3 Months Ended
Apr. 30, 2015
Segment Reporting [Abstract]  
Revenues related to operations in geographic regions
Revenues related to operations in the geographic regions were:
 
 
Three months ended April 30,
 
 
2015
 
2014
Revenues:
 
 
 
 
United States
 
$
129,191

 
$
124,766

Europe
 
46,319

 
60,149

Japan
 
21,417

 
21,281

Pacific Rim
 
70,129

 
43,713

Other
 
5,087

 
2,242

Total revenues
 
$
272,143

 
$
252,151