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Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 15. Commitments and Contingencies We have entered into the collaboration agreements described in Note 8, as well as various other collaboration agreements that are not individually, or in the aggregate, significant to our operating results or financial condition at this time. We may in the future seek to license additional rights relating to technologies or drug development candidates in connection with our drug discovery and development programs. Under these agreements, we may be required to pay upfront fees, milestone payments, and royalties on sales of future products. In the ordinary course of our business, we may become involved in lawsuits, proceedings, and other disputes, including commercial, intellectual property, regulatory, employment, and other matters. We record a reserve for these matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. We brought a lawsuit against the U.S. Centers for Medicare and Medicaid Services (“CMS”) alleging that a recent regulation issued by CMS on the definition of “line extension” for purposes of the Medicaid rebate program is too broad and has the unintended consequence of treating OPZELURA as a “line extension” of JAKAFI under this program. We believe that such a reading would violate CMS’s statutory authority and be arbitrary and capricious given that OPZELURA, among other differentiators, is indicated to treat entirely different medical conditions and entirely different patient populations than JAKAFI. As of March 31, 2024, we have accrued approximately $73.7 million within accrued and other current liabilities on the condensed consolidated balance sheet, relating to the incremental rebates that would be owed were OPZELURA considered a line extension of JAKAFI. The impact on OPZELURA gross to net deductions for the quarter ending March 31, 2024 is approximately 7.2%. If OPZELURA is not treated as a line extension of JAKAFI, this would result in a reversal of our accrual and a lower future gross to net deduction for OPZELURA. In addition, as described in Note 8, we have an outstanding contractual dispute with Novartis relating to royalties on JAKAFI net sales within the United States.