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Related Party Transactions (Tables)
 12 Months Ended
Jan. 31, 2015
Related Party Transactions [Abstract]  
Revenue Recognized from Related Party
The following table shows revenue recognized from these customers:
 
Year ended January 31,
2015
 
2014
 
2013
Revenue from customers
$
32,594

 
$
85,037

 
$
56,878

Percentage of total revenues
2.6
%
 
7.4
%
 
5.2
%