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Concentration of credit risk and current expected credit losses (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Net Product Revenues | Customer Concentration Risk | Customer A |  |  |  |  |
Concentration of risk |  |  |  |  |
Percentage of concentration risk | 20.00% | 20.00% | 19.00% | 19.00% |
Net Product Revenues | Customer Concentration Risk | Customer B |  |  |  |  |
Concentration of risk |  |  |  |  |
Percentage of concentration risk | 14.00% | 13.00% | 13.00% | 14.00% |
Net Product Revenues | Customer Concentration Risk | Customer C |  |  |  |  |
Concentration of risk |  |  |  |  |
Percentage of concentration risk | 16.00% | 16.00% | 17.00% | 16.00% |
Net Product Revenues | Customer Concentration Risk | Customer D |  |  |  |  |
Concentration of risk |  |  |  |  |
Percentage of concentration risk | 11.00% | 11.00% | 11.00% | 12.00% |
Accounts Receivable | Credit Concentration Risk | Collaboration Partner B, C and D |  |  |  |  |
Concentration of risk |  |  |  |  |
Percentage of concentration risk |  |  | 45.00% |  | 30.00%
Accounts Receivable | Credit Concentration Risk | Customer A, B, C and D |  |  |  |  |
Concentration of risk |  |  |  |  |
Percentage of concentration risk |  |  | 29.00% |  | 39.00%

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