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INVENTORY (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Jun. 30, 2023
Inventory    
Raw Materials   $ 24
Work in Process   29,551
Finished Goods   659
Total Inventory   $ 30,234
BRIUMVI (Ublituximab)    
Inventory    
Costs related to BRIUMVI $ 0