XML 56 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1
Geographic Information and Concentrations of Risk - Schedule of Geographic Concentration of Net Revenues (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues $ 50,630 $ 57,461 $ 146,420 $ 172,763
United States and Canada        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 35,891 42,056 98,559 125,969
South Africa        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 9,145 9,754 30,038 29,694
Other        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues $ 5,594 $ 5,651 $ 17,823 $ 17,100