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Transactions with Related Parties Transactions with Related Parties, Principal Executive Office Lease (Details)
€ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2019
EUR (€)
Related Party Transactions [Abstract]    
Term of lease 3 years 3 years
Annual lease payment $ 72 € 63