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Term Loans - Oxford Term Loans (Details)
3 Months Ended 9 Months Ended
Jan. 04, 2021
USD ($)
Mar. 15, 2019
USD ($)
advance
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Debt Instrument [Line Items]            
Loss from extinguishment of debts, net     $ 0 $ 0 $ 0 $ 968,000
Term Loan Facility            
Debt Instrument [Line Items]            
Percentage of final payment of full principal amount   5.50%        
Prepayment fee percentage, year two   2.00%        
Prepayment fee percentage, thereafter   1.00%        
Oxford Term Loan Facility            
Debt Instrument [Line Items]            
Repayments of long-term lines of credit $ 76,447,000          
Debt instrument fee amount comprised 4,300,000          
Debt instrument of principal amount payment 2,800,000          
Debt instrument prepayment fee amount $ 1,500,000          
Loss from extinguishment of debts, net           $ 1,939,000
Secured Debt            
Debt Instrument [Line Items]            
Contingent promissory note payable   $ 100,000,000        
Number of advances | advance   2        
Interest rate on debt   9.50%        
Period of interest only payments   36 months        
Amortization period   23 months        
Secured Debt | London Interbank Offered Rate (LIBOR)            
Debt Instrument [Line Items]            
Basis spread on variable rate   7.00%        
Secured Debt | First tranche            
Debt Instrument [Line Items]            
Contingent promissory note payable   $ 75,000,000        
Secured Debt | Second tranche            
Debt Instrument [Line Items]            
Contingent promissory note payable   $ 25,000,000