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Revenue and Segment Information - Schedule of Net Revenue by Organ and Country (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 143,823	$ 108,761	$ 444,730	$ 319,916
Service Unrelated to OCS Transplant [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,200	$ 1,300	$ 3,100	$ 3,300

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