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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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