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Concentration of credit risk and current expected credit losses (Tables) | 6 Months Ended
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Jun. 30, 2020
Concentration of credit risk and current expected credit losses |
Schedule of concentration of credit risk related to specialty pharmacy customers | In November 2011, we began commercialization and distribution of JAKAFI and in April 2020, we began commercialization and distribution of PEMAZYRE to a number of customers. Our product revenues are concentrated in a number of these customers. The concentration of credit risk related to our JAKAFI and PEMAZYRE product revenues is as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Percentage of Total Net | ​ | Percentage of Total Net | ​
​ | ​ | Product Revenues for the | ​ | Product Revenues for the | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ | ​ | June 30, | ​ | June 30, | ​
​ |  | 2020 |  | 2019 |  | ​ | 2020 |  | 2019 |  |
Customer A |  | 20 | % | 20 | % |  | 19 | % | 19 | % | ​
Customer B |  | 14 | % | 13 | % |  | 13 | % | 14 | % | ​
Customer C |  | 16 | % | 16 | % |  | 17 | % | 16 | % | ​
Customer D |  | 11 | % | 11 | % |  | 11 | % | 12 | % | ​

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- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark, related to the specialty pharmaceutical customers. + References No definition available. + Details
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- References No definition available. + Details
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