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Related Party Transactions (Details)
9 Months Ended 12 Months Ended
Jul. 01, 2019
USD ($)
Jul. 01, 2019
CNY (¥)
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Related Party Transaction [Line Items]          
Inventory, Net     $ 720,000 $ 4,542,000  
Spectrum [Member]          
Related Party Transaction [Line Items]          
Accounts Payable, Related Parties, Current       200,000  
Amount of Expense Incurred       2,600,000  
Spectrum [Member] | EVOMELA [Member]          
Related Party Transaction [Line Items]          
Related Party Transaction, Purchase Obligation Commitments         $ 9,200,000
Related Party Transaction, Purchases from Related Party       $ 7,800,000  
Juventas Cell Therapy Ltd [Member]          
Related Party Transaction [Line Items]          
Lessor, Operating Lease, Term of Contract 1 year 1 year      
Operating Lease, Lease Income, Lease Payments $ 15,000 ¥ 80,000      
Operating Lease, Lease Income     $ 104,000