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Agreements with Endospan (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Sep. 11, 2019
USD ($)
May 31, 2023
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
tranche
Jun. 30, 2022
USD ($)
Variable Interest Entity [Line Items]                
Securities purchase option agreement, expiration period             90 days  
Number of tranches | tranche             3  
Expense         $ 4,241 $ 3,770 $ 3,278 $ 3,903
Variable Interest Entity, Primary Beneficiary                
Variable Interest Entity [Line Items]                
Securities purchase option agreement       $ 1,000        
Per three tranches of funding $ 5,000              
Funded second tranche payment   $ 5,000 $ 5,000          
Required percentage of number of patients before tranche of loan funding can be acquired   50.00%            
Expense         $ 5,000   $ 5,000  
Variable Interest Entity, Primary Beneficiary | Minimum                
Variable Interest Entity [Line Items]                
Option to purchase outstanding securities       350,000        
Variable Interest Entity, Primary Beneficiary | Maximum                
Variable Interest Entity [Line Items]                
Option to purchase outstanding securities       $ 450,000        
Secured Debt | Variable Interest Entity, Primary Beneficiary                
Variable Interest Entity [Line Items]                
Loan provided 15,000              
JOTEC GmbH | Variable Interest Entity, Primary Beneficiary                
Variable Interest Entity [Line Items]                
Distribution fee $ 9,000