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Related Party Transactions (Tables)
 12 Months Ended
Jan. 31, 2016
Related Party Transactions [Abstract]  
Revenue Recognized from Related Party
The following table shows revenue recognized from these customers:
Year ended January 31,
2016
 
2015
 
2014
Revenue from customers
$
25,059

 
$
32,594

 
$
85,037

Percentage of total revenues
2.1
%
 
2.6
%
 
7.4
%