Quarterly report pursuant to Section 13 or 15(d)

Segment, Geographical and Other Revenue Information - Concentration Risk (Details)

v3.20.1
Segment, Geographical and Other Revenue Information - Concentration Risk (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Revenue, Product and Service Benchmark [Member] | Customer A [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 24.00% 41.00%  
Revenue, Product and Service Benchmark [Member] | Customer B [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 19.00% 0.00%  
Revenue, Product and Service Benchmark [Member] | Customer C [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 15.00% 0.00%  
Revenue, Product and Service Benchmark [Member] | Customer D [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 11.00% 35.00%  
Accounts Receivable [Member] | Customer A [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 47.00%   38.00%
Accounts Receivable [Member] | Customer D [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 0.00%   10.00%