Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions (Narrative) (Details)

v3.21.1
Related Party Transactions (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Jun. 12, 2020
Related Party Transaction [Line Items]      
Revenue from TGTX $ 68,000 $ 972,000  
Debt instrument, stated interest rate 11.00%    
Interest paid $ 2,189,000 3,125,000  
Avenue [Member]      
Related Party Transaction [Line Items]      
Remaining funding commitment     $ 800,000
2018 Venture Notes [Member]      
Related Party Transaction [Line Items]      
Interest paid 0 609,000  
2017 Subordinated Note Financing [Member]      
Related Party Transaction [Line Items]      
Interest paid $ 0 1,396,000  
Chief Executive Officer (Dr. Rosenwald) [Member]      
Related Party Transaction [Line Items]      
Interest own in percent by principal stockholder or director 10.80%    
Executive Vice Chairman [Member]      
Related Party Transaction [Line Items]      
Interest own in percent by principal stockholder or director 11.60%    
Shared Services Agreement [Member] | TGTX [Member]      
Related Party Transaction [Line Items]      
Related party transaction, receivables $ 100,000 100,000  
Proceeds from Related Party Agreement 100,000 100,000  
Desk Share Agreements [Member] | TGTX and OPPM [Member] | New York, NY Office Space [Member]      
Related Party Transaction [Line Items]      
Related party transaction, receivables 0    
Total payment for rent 700,000 700,000  
Desk Share Agreements [Member] | OPPM [Member] | New York, NY Office Space [Member]      
Related Party Transaction [Line Items]      
Related party transaction, receivables 0 0  
Desk Share Agreements [Member] | TGTX [Member] | New York, NY Office Space [Member]      
Related Party Transaction [Line Items]      
Related party transaction, receivables 400,000 400,000  
Desk Share Agreements [Member] | TGTX [Member] | Waltham office space [Member]      
Related Party Transaction [Line Items]      
Related party transaction, receivables 28,000 29,000  
Total payment for rent 100,000 $ 100,000  
InvaGen [Member] | Avenue [Member]      
Related Party Transaction [Line Items]      
Credit facility, amount outstanding $ 0    
Debt instrument, stated interest rate     7.00%
Maximum borrowing capacity     $ 2,000,000.0
Remaining funding commitment     $ 1,200,000