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Debt - Schedule of Borrowings under ACEA Significant Debt Arrangements (Details) - ACEA Therapeutics, Inc - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Principal $ 27,555 $ 29,048
Unamortized debt discount (9,154) (10,642)
Carrying value 18,401 18,406
Estimated fair value $ 14,200 $ 17,100