XML 57 R46.htm IDEA: XBRL DOCUMENT v3.20.2
Segment Reporting - Narrative (Details) - segment
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Revenue, Major Customer [Line Items]        
Number of operating segments 1 1 1 1
Outside of the United States | Revenue | Geographic Concentration Risk        
Revenue, Major Customer [Line Items]        
Concentration risk percentage 2.00% 2.00% 2.00% 2.00%