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BORROWING - Narrative (Details) - USD ($)
Oct. 29, 2024
Feb. 23, 2022
Sep. 30, 2024
Oct. 31, 2023
May 31, 2018
Debt Instrument [Line Items]          
Principal outstanding     $ 104,950,000    
2018 Exit Fee          
Debt Instrument [Line Items]          
Agreed amount for exit fee upon occurrence of certain conditions         $ 1,500,000
2022 Exit Fee          
Debt Instrument [Line Items]          
Exit fee (as percent)       2.00%  
2018 Term Loan | Loan Agreement          
Debt Instrument [Line Items]          
Term loan face amount         $ 50,000,000.0
Principal outstanding   $ 25,000,000.0      
2022 Term Loan | Loan Agreement          
Debt Instrument [Line Items]          
Final fee due upon maturity, acceleration, prepayment, or termination (as percent)   4.95%      
Loan agreement covenant, cash and cash equivalents as percentage of outstanding loan balance, minimum   80.00%      
Loan agreement, covenant, cash and cash equivalents as percentage of outstanding loan balance, calculation period (in months)   6 months      
Loan agreement covenant, net product revenue as percentage of outstanding loan balance, minimum   60.00%      
Additional default interest rate (as percent)   4.00%      
2022 Term Loan | Loan Agreement | Prior to first anniversary of closing date          
Debt Instrument [Line Items]          
Prepayment premium (as percent)       3.00%  
2022 Term Loan | Loan Agreement | After first anniversary through second anniversary of closing date          
Debt Instrument [Line Items]          
Prepayment premium (as percent)       2.00%  
2022 Term Loan | Loan Agreement | After second anniversary to maturity date          
Debt Instrument [Line Items]          
Prepayment premium (as percent)       1.00%  
Term Loan A | Loan Agreement          
Debt Instrument [Line Items]          
Proceeds from the sale of future royalties, net of issuance costs   $ 27,500,000      
Closing fee     200,000    
Term Loan A | Loan Agreement | Subsequent event          
Debt Instrument [Line Items]          
Interest rate (as percent) 7.95%        
Term Loan A | Loan Agreement | Secured Overnight Financing Rate (SOFR) | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 0.022%        
Term Loan A | Loan Agreement | Floor Rate | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 1.00%        
Term Loan B | Loan Agreement          
Debt Instrument [Line Items]          
Term loan face amount   $ 22,500,000      
Future obligation upon loan funding or other events     100,000    
Term Loan B | Loan Agreement | Subsequent event          
Debt Instrument [Line Items]          
Interest rate (as percent) 7.95%        
Term Loan B | Loan Agreement | Secured Overnight Financing Rate (SOFR) | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 0.022%        
Term Loan B | Loan Agreement | Floor Rate | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 1.00%        
Term Loan C | Loan Agreement          
Debt Instrument [Line Items]          
Term loan face amount       $ 50,000,000.0  
Closing fee     $ 300,000    
Term Loan C | Loan Agreement | Subsequent event          
Debt Instrument [Line Items]          
Interest rate (as percent) 4.25%        
Term Loan C | Loan Agreement | Secured Overnight Financing Rate (SOFR) | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 0.022%        
Term Loan C | Loan Agreement | Floor Rate | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 4.70%        
Term Loan D | Loan Agreement          
Debt Instrument [Line Items]          
Additional uncommitted capital       $ 50,000,000.0  
Term Loan D | Loan Agreement | Subsequent event          
Debt Instrument [Line Items]          
Interest rate (as percent) 4.00%        
Closing fee $ 300,000        
Term Loan D | Loan Agreement | Secured Overnight Financing Rate (SOFR) | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 0.022%        
Term Loan D | Loan Agreement | Floor Rate | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 4.70%        
Term Loan E | Loan Agreement | Subsequent event          
Debt Instrument [Line Items]          
Term loan face amount $ 50,000,000        
Proceeds from the sale of future royalties, net of issuance costs $ 50,000,000        
Interest rate (as percent) 4.00%        
Closing fee $ 300,000        
Closing fee percentage 0.50%        
Term Loan E | Loan Agreement | Secured Overnight Financing Rate (SOFR) | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 0.022%        
Term Loan E | Loan Agreement | Floor Rate | Subsequent event          
Debt Instrument [Line Items]          
Floating per annum rate (as percent) 4.70%