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CONVERTIBLE NOTES - 5.00% Notes (Narrative) (Details)
$ / shares in Units, instrument in Millions
1 Months Ended 12 Months Ended
Oct. 18, 2023
$ / shares
Jun. 30, 2023
USD ($)
Jun. 09, 2023
USD ($)
Aug. 31, 2023
USD ($)
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2024
USD ($)
instrument
shares
Dec. 31, 2023
USD ($)
instrument
shares
Aug. 31, 2024
Dec. 31, 2022
USD ($)
Debt Instrument [Line Items]                  
Paid-in-kind interest           $ 4,380,000 $ 1,718,000    
Accrued interest           $ 148,000 164,000    
Equity Option                  
Debt Instrument [Line Items]                  
Derivative liability     $ 38,200,000       $ 0   $ 0
5.00% Convertible Notes Due 2026 | Convertible Notes                  
Debt Instrument [Line Items]                  
Interest rate (as a percent)   5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Aggregate principal amount   $ 10,000,000     $ 10,000,000        
Initial conversion price (in dollars per share) | $ / shares $ 7.20                
Conversion price premium (as a percent) 50.00%                
Conversion ratio 0.13888889   0.13888889   0.13888889        
Payments of debt issuance costs         $ 3,000,000        
Contractual term (in years)   3 years 6 months     3 years 6 months        
Effective interest rate (as a percent)           27.56% 27.30%    
Debt instrument, convertible, number of equity instruments | instrument           9.9 9.4    
Debt instrument, redemption percentage   100.00%              
Loss on extinguishment of debt             $ (14,100,000)    
Unamortized debt premium     $ 6,000,000     $ 4,140,000 5,408,000    
Paid-in-kind interest           3,400,000 1,700,000    
Accrued interest           100,000 100,000    
5.00% Convertible Notes Due 2026 | Convertible Notes | Level 3                  
Debt Instrument [Line Items]                  
Fair value     $ 38,200,000     54,800,000 50,800,000    
5.00% Convertible Notes Due 2026 | Convertible Notes | Minimum                  
Debt Instrument [Line Items]                  
Initial conversion price (in dollars per share) | $ / shares $ 8.30                
Conversion ratio 0.12048193                
5.00% Convertible Notes Due 2026 | Convertible Notes | June 2023 Restructuring Transaction                  
Debt Instrument [Line Items]                  
Aggregate principal amount exchanged         $ 56,900,000        
Aggregate principal amount   $ 10,000,000     $ 10,000,000        
5.00% Convertible Notes Due 2026 | Convertible Notes | August 2023 Conversions                  
Debt Instrument [Line Items]                  
Aggregate principal amount exchanged       $ 700,000          
Shares issued (in shares) | shares       94,000          
5.00% Convertible Notes Due 2026 | Convertible Notes | Fixed Conversion Rate Conversions                  
Debt Instrument [Line Items]                  
Aggregate principal amount exchanged           $ 100,000 $ 300,000    
Shares issued (in shares) | shares           11,000 39,000    
5.00% Convertible Notes Due 2026 | Convertible Notes | Initial Conversion Rate Conversions                  
Debt Instrument [Line Items]                  
Aggregate principal converted amount             $ 700,000    
Fair value             400,000    
Loss on extinguishment of debt             100,000    
5.00% Convertible Notes Due 2026 | Convertible Notes | Fixed Conversion Rate Conversions 2023                  
Debt Instrument [Line Items]                  
Aggregate principal converted amount             300,000    
5.00% Convertible Notes Due 2026 | Convertible Notes | Fixed Conversion Rate Conversions 2024                  
Debt Instrument [Line Items]                  
Aggregate principal converted amount             $ 100,000