Inventory (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Inventory [Line Items]
Raw Materials	$ 2,471,234	$ 3,621,548
Work in Process	184,382	256,129
Finished Goods	1,432,290	1,798,101
Total	4,087,906	5,675,778
Inventory, non-current	441,000	1,637,000
Increase in inventory reserves and write-offs		8,800,000
Inventory, net	3,646,906	4,038,778
Triferic Finished Goods
Inventory [Line Items]
Inventory, non-current	400,000	1,600,000
Finished goods inventory	3,500,000	8,000,000
Inventory reserve	2,800,000	5,800,000
Increase in inventory reserves and write-offs	1,300,000	8,100,000
Inventory, net	700,000
Calcitriol
Inventory [Line Items]
Increase in inventory reserves and write-offs		$ 700,000
Dialysate Triferic
Inventory [Line Items]
Inventory, net	200,000
Triferic API
Inventory [Line Items]
Inventory, net	$ 500,000