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Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Inventory - Current Portion    
Raw Materials $ 2,806 $ 3,351
Work in Process 504 351
Finished Goods 2,285 2,112
Total Current Inventory 5,595 5,814
Inventory - Long Term 1,276 1,276
Total Inventory 6,871 7,090
Triferic Inventory    
Inventory - Current Portion    
Total Current Inventory 1,300 1,300
Inventory - Long Term 1,300 1,300
Inventory, gross 5,600 5,800
Inventory, reserve $ 25 $ 25