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Concentration of Risk (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Sales Revenue | Customer Concentration Risk        
Concentration of Risk        
Percentage of total net revenue 9.00% 31.00% 15.00% 31.00%