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Concentration of Credit Risk and Current Expected Credit Losses
3 Months Ended
Mar. 31, 2023
Risks and Uncertainties [Abstract]  
Concentration of Credit Risk and Current Expected Credit Losses
Note 5. Concentration of Credit Risk and Current Expected Credit Losses
In November 2009, we entered into a collaboration and license agreement with Novartis Pharmaceutical International Ltd. (“Novartis”). In December 2009, we entered into a license, development and commercialization agreement with Eli Lilly and Company (“Lilly”). The above collaboration partners comprised, in aggregate, 18% and 20% of the accounts receivable balance as of March 31, 2023 and December 31, 2022, respectively. For further information relating to these collaboration and license agreements, refer to Note 7.
In November 2011, we began commercialization and distribution of JAKAFI, in April 2020, we began commercialization and distribution of PEMAZYRE, and in October 2021, we began commercialization and distribution of OPZELURA. Our product revenues are concentrated in a number of these customers. The concentration of credit risk related to our JAKAFI, PEMAZYRE and OPZELURA product revenues is as follows:
Percentage of Total Net
Product Revenues for the
Three Months Ended
March 31,
20232022
Customer A17 %19 %
Customer B11 %12 %
Customer C17 %18 %
Customer D10 %10 %
Customer E12 %15 %
We are exposed to risks associated with extending credit to customers related to the sale of products. Customers A, B, C, D, and E comprised, in aggregate, 40% and 41% of the accounts receivable balance as of March 31, 2023 and December 31, 2022, respectively. The concentration of credit risk relating to our other product revenues or accounts receivable is not significant.
We assessed our collaborative and customer receivable assets as of March 31, 2023 according to our accounting policy for applying reserves for expected credit losses, noting minimal history of uncollectible receivables and the continued perceived creditworthiness of our third party sales relationships, upon which the expected credit losses were considered de minimis. As of March 31, 2023 and December 31, 2022, we had no allowance for doubtful accounts.