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BORROWING - Narrative (Details) - USD ($)
Oct. 17, 2023
Feb. 23, 2022
Jun. 30, 2024
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%      
Exit fee, term (in years) 10 years      
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    
Interest rate (as percent) 7.95%      
Closing fee $ 200,000      
Term Loan A | Loan Agreement | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Floating per annum rate (as percent) 0.022%      
Term Loan A | Loan Agreement | Floor Rate        
Debt Instrument [Line Items]        
Floating per annum rate (as percent) 1.00%      
Term Loan B | Loan Agreement        
Debt Instrument [Line Items]        
Remaining funding based on milestone achievement   22,500,000    
Interest rate (as percent) 7.95%      
Future obligation upon loan funding or other events   $ 100,000    
Term Loan B | Loan Agreement | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Floating per annum rate (as percent) 0.022%      
Term Loan B | Loan Agreement | Floor Rate        
Debt Instrument [Line Items]        
Floating per annum rate (as percent) 1.00%      
Term Loan C | Loan Agreement        
Debt Instrument [Line Items]        
Additional committed capital $ 50,000,000.0      
Interest rate (as percent) 4.25%      
Closing fee $ 300,000      
Term Loan C | Loan Agreement | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Floating per annum rate (as percent) 0.022%      
Term Loan C | Loan Agreement | Floor Rate        
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      
Interest rate (as percent) 4.25%      
Closing fee percentage 0.50%      
Term Loan D | Loan Agreement | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Floating per annum rate (as percent) 0.022%      
Term Loan D | Loan Agreement | Floor Rate        
Debt Instrument [Line Items]        
Floating per annum rate (as percent) 4.70%