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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Income Taxes [Line Items]          
Benefit (provision) from income taxes $ 3,875 $ 0 $ 3,875 $ (288)  
Increase (decrease) in deferred tax liability (4,000)   (4,000)    
Income Taxes Paid     100    
IPR&D intangible assets:          
Income Taxes [Line Items]          
Intangible assets 0   0   $ 14,700
Vicinium | Europe | IPR&D intangible assets:          
Income Taxes [Line Items]          
Intangible assets 0   $ 0   $ 14,700
Impairment of intangible assets $ 14,700