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Segment and Geographic Information - Narrative (Details) - segment
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of operating segments     2
Number of reportable segments     1
One Customer | Revenue | Customer Concentration Risk      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Concentration risk, percentage 10.00% 8.00%