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Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Inventory [Line Items]    
Raw Materials $ 3,598 $ 3,112
Work in Process 265 172
Finished Goods 1,936 1,805
Total 5,799 5,089
Inventory, noncurrent 1,122 1,176
Inventory, net 4,677 $ 3,913
Triferic Inventory    
Inventory [Line Items]    
Raw Materials 900  
Inventory, noncurrent 1,100  
Inventory, net 1,700  
Triferic Dialysate    
Inventory [Line Items]    
Finished Goods 300  
Triferic API    
Inventory [Line Items]    
Inventory, net $ 500