Quarterly report pursuant to Section 13 or 15(d)

Debt and Interest (Narrative) (Details)

v3.21.2
Debt and Interest (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 12, 2021
Sep. 28, 2021
Aug. 27, 2020
Mar. 31, 2021
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Aug. 29, 2020
Debt Instrument [Line Items]                      
Total notes payable         $ 53,019,000     $ 53,019,000   $ 51,677,000  
Unamortized debt discount fees         7,431,000     7,431,000   $ 8,323,000  
Debt instrument, interest expense         $ 3,724,000   $ 3,046,000 $ 7,770,000 $ 7,823,000    
Debt instrument, stated interest rate         11.00%     11.00%      
Debt issuance fees               $ 8,700,000      
Fair Value Adjustment of Warrants         $ 2,000   803,000 184,000 1,189,000    
Subsequent Events [Member]                      
Debt Instrument [Line Items]                      
Prepayment of debt owed to Dr. Rosenwald $ 10,500,000                    
Prepayment due $ 10,500,000                    
Letter of Credit [Member]                      
Debt Instrument [Line Items]                      
Debt instrument, interest expense         14,000   14,000 37,000 45,000    
IDB Note Payable [Member]                      
Debt Instrument [Line Items]                      
Debt instrument, interest expense         0   77,000 0 246,000    
Repayments of debt               0 14,858,000    
2017 Subordinated Note Financing [Member]                      
Debt Instrument [Line Items]                      
Debt instrument, interest expense         0   694,000 0 2,870,000    
Repayments of debt               0 28,356,000    
Payment of debt issuance fees               0 93,000    
Oaktree Note [Member]                      
Debt Instrument [Line Items]                      
Debt instrument face amount     $ 60,000,000.0                
Debt instrument, interest expense         2,136,000   624,000 5,455,000 624,000    
Debt instrument, stated interest rate     11.00%                
Debt prepayment penalties               450,000 0    
Percentage of upfront commitment fee     3.00%                
Upfront Commitment Fee     $ 1,800,000                
Debt issuance fees               1,800,000      
Agency fees payment     35,000                
Payment of expenses to third parties     $ 2,500,000         2,500,000      
Exercise price of warrants                     $ 3.20
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     1,749,450                
Warrants, fair value     $ 4,400,000   4,400,000     4,400,000      
Payment of debt issuance fees               95,000 4,239,000    
Oaktree Note [Member] | Maximum [Member]                      
Debt Instrument [Line Items]                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                     1,749,450
Mustang Horizon Notes [Member]                      
Debt Instrument [Line Items]                      
Debt instrument, interest expense         0   895,000 0 1,585,000    
Repayments of debt               0 15,750,000    
2018 Venture Notes [Member]                      
Debt Instrument [Line Items]                      
Debt instrument, interest expense         0   $ 387,000 0 1,253,000    
Repayments of debt               0 21,707,000    
Payment of debt issuance fees               0 $ 58,000    
Caelum [Member]                      
Debt Instrument [Line Items]                      
Debt prepayment penalties   $ 500,000     500,000            
Prepayment amount on monetization   $ 10,000,000                  
Journey [Member] | East West Bank ("EWB Loan") [Member]                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity       $ 7,500,000   $ 7,500,000          
Payment of debt issuance fees               56,250      
Legal fees               100,000      
Debt Instrument, Description of Variable Rate Basis       Interest on the line is the greater of 4.25% or the Prime Rate plus 1%.              
Basis spread on variable rate           4.25%          
Line of Credit facility expiration period       36 months              
Credit facility, amount outstanding         0     0      
Deferred loan origination fees         $ 100,000     $ 100,000