XML 73 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1
Segment Reporting and Significant Customer Information - Long Lives Assets by Geographic Area (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 4,921 $ 6,158
United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 3,893 4,755
Rest of the world    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 1,028 $ 1,403