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Note Payable (Details)
€ in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2021
EUR (€)
Sep. 30, 2021
USD ($)
item
Sep. 30, 2021
EUR (€)
item
Sep. 30, 2021
EUR (€)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]            
Note payable | $ $ 4,509   $ 4,509     $ 4,912
Repayable no later than December 31, 2021            
Debt Instrument [Line Items]            
Note payable 3,600   3,600   € 3,000  
Repayable no later than December 31, 2022            
Debt Instrument [Line Items]            
Note payable 1,200   $ 1,200   1,000  
CRYOPDP            
Debt Instrument [Line Items]            
Number of installment | item     2 2    
Note payable 4,800   $ 4,800   4,000  
Fair market value of debt discount 300   300   € 200  
Amortization of debt discount $ 50 € 40 $ 200 € 100