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Accounts Receivable - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2025 USD ($) Distributor
Accounts Receivable [Line Items]
Number of wholesale distributors | Distributor		3
Percentage of gross sales from major wholesale distributors	77.00%	75.00%
Allowance for credit losses and doubtful accounts | $	$ 0	$ 0
United Therapeutics Corporation
Accounts Receivable [Line Items]
Percentage of collaborations and services net accounts receivables		96.00%
Percentage of revenue from major customers collaborations and services	98.00%	98.00%
Commercial product sales
Accounts Receivable [Line Items]
Percentage of accounts receivable from major wholesale distributors	88.00%	88.00%

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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