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Related Party Transactions - Nant Capital Note Purchase Agreement (Details) - USD ($)
$ in Thousands
Apr. 13, 2021
Jun. 30, 2022
Dec. 31, 2021
Related Party Transaction [Line Items]      
Interest payable   $ 703 $ 703
4.50% Convertible Senior Notes Due 2026 | Convertible Debt | Nant Capital      
Related Party Transaction [Line Items]      
Proceeds from issuance of notes $ 62,500    
Interest payable   $ 586 $ 586