Annual report pursuant to Section 13 and 15(d)

Major Customers (Details)

v3.6.0.2
Major Customers (Details) - Revenues - Customer concentration risk - Fidelity - customer
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Major Customers      
Number of customers accounted for as major customer 1 1 1
Revenue as a percentage of the company's total 15.00% 18.00% 19.00%