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Agreements with Endospan (Details)				1 Months Ended			3 Months Ended			6 Months Ended	9 Months Ended
	Jul. 01, 2024 USD ($) tranche	Jun. 30, 2024 USD ($)	Sep. 11, 2019 USD ($) tranche	May 31, 2023 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Variable Interest Entity [Line Items]
Number of tranches | tranche			3
Expense							$ (2,386,000)	$ 1,911,000			$ 6,000	$ 5,189,000
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Securities purchase option agreement						$ 1,000,000
Option to purchase outstanding securities	$ 175,000,000	$ 250,000,000
Securities purchase option agreement, expiration period						90 days
Minimum amount of future consideration payment	0
Securities purchase option agreement, payment	100,000,000
Maximum amount of future consideration payment	200,000,000
Securities purchase option agreement, fair value							3,100,000
Loan provided	$ 25,000,000		$ 15,000,000
Number of tranches | tranche	3
Funding of loan agreement per tranche			5,000,000
Funded second tranche payment				$ 5,000,000	$ 5,000,000
Required percentage of number of patients before tranche of loan funding can be acquired				50.00%
Loans at fair value									$ 0	$ 0
Expense									$ 5,000,000	$ 5,000,000
Variable Interest Entity, Primary Beneficiary | Upfront Acquisition Purchase Price
Variable Interest Entity [Line Items]
Option to purchase outstanding securities	$ 135,000,000
Variable Interest Entity, Primary Beneficiary | Tranche One
Variable Interest Entity [Line Items]
Funding of loan agreement per tranche	7,000,000						7,000,000
Variable Interest Entity, Primary Beneficiary | Tranche Two
Variable Interest Entity [Line Items]
Funding of loan agreement per tranche	10,000,000
Variable Interest Entity, Primary Beneficiary | Tranche Three
Variable Interest Entity [Line Items]
Funding of loan agreement per tranche	$ 8,000,000
Variable Interest Entity, Primary Beneficiary | Endospan Loan | After Funding of First Tranche Payment
Variable Interest Entity [Line Items]
Loans at fair value							298,000				298,000
Variable Interest Entity, Primary Beneficiary | Endospan Loans | Tranche One
Variable Interest Entity [Line Items]
Loans at fair value							$ 3,800,000				$ 3,800,000
Variable Interest Entity, Primary Beneficiary | Minimum
Variable Interest Entity [Line Items]
Option to purchase outstanding securities						$ 350,000,000.0
Variable Interest Entity, Primary Beneficiary | Maximum
Variable Interest Entity [Line Items]
Option to purchase outstanding securities						$ 450,000,000
Variable Interest Entity, Primary Beneficiary | JOTEC GmbH
Variable Interest Entity [Line Items]
Distribution fee			$ 9,000,000

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