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Concentration of Risk (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Sales Revenue | Customer Concentration Risk        
Concentration of Risk        
Percentage of total net revenue 7.00% 32.00% 12.00% 31.00%