Business (Details) treatmentCourse in Millions, $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2022 USD ($) treatmentCourse	Jun. 30, 2022 segment category productCandidate product
Asset Acquisition [Line Items]
Number of categories of public health threats \| category		5
Number of revenue generating products \| product		11
Number of product candidates \| productCandidate		1
Number of operating segments \| segment		2
Forecast
Asset Acquisition [Line Items]
Asset acquisition, domestic royalty percentage	20.00%
Asset acquisition, minimum therapy treatment courses required to earn royalty on future gross profit \| treatmentCourse	1.7
Asset acquisition, international royalty percentage	15.00%
Chimerix Asset Acquisition \| Forecast
Asset Acquisition [Line Items]
Payments to acquire productive assets	$ 225.0
Asset acquisition, consideration transferred, contingent consideration	100.0
Chimerix Asset Acquisition \| Milestone Payment One \| Forecast
Asset Acquisition [Line Items]
Asset acquisition, consideration transferred, contingent consideration	25.0
Chimerix Asset Acquisition \| Milestone Payment Two \| Forecast
Asset Acquisition [Line Items]
Asset acquisition, consideration transferred, contingent consideration	25.0
Chimerix Asset Acquisition \| Milestone Payment Three \| Forecast
Asset Acquisition [Line Items]
Asset acquisition, consideration transferred, contingent consideration	25.0
Chimerix Asset Acquisition \| Milestone Payment Four \| Forecast
Asset Acquisition [Line Items]
Asset acquisition, consideration transferred, contingent consideration	25.0
Chimerix Asset Acquisition \| Regulatory Milestones \| Forecast
Asset Acquisition [Line Items]
Asset acquisition, consideration transferred, contingent consideration	$ 12.5

Asset Acquisition, Domestic Gross Profit Royalty Percentage

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Asset Acquisition, International Gross Profit Royalty Percentage

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Asset Acquisition, Minimum Therapy Treatment Courses Required To Earn Royalty On Future Gross Profit

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Refers to the number of categories of public health threats.

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Number Of Product Candidates

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Amount of contingent consideration recognized as part of consideration transferred in asset acquisition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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