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Major Customers (Tables)
 12 Months Ended
Dec. 31, 2016
Major Customers  
Summary of revenues from major customers

 

 

 

 

 

 

 

 

 

 

Year Ended December 31,

 

 

    

2016

    

2015

 

2014

 

Fidelity

 
15

%
18

%
19

%