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Inventory (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory [Line Items]    
Raw Materials $ 2,794 $ 2,471
Work in Process 329 185
Finished Goods 1,613 1,432
Total 4,736 4,088
Inventory, noncurrent 859 441
Inventory, net 3,877 $ 3,647
Triferic Inventory    
Inventory [Line Items]    
Raw Materials 700  
Inventory, noncurrent 900  
Inventory, gross 3,800  
Inventory, reserve 2,700  
Inventory, net 1,100  
Triferic Dialysate    
Inventory [Line Items]    
Finished Goods 100  
Triferic API    
Inventory [Line Items]    
Inventory, net $ 300