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FAIR VALUE MEASUREMENTS - Schedule Of Aggregate Fair Value Of Warrants (Details) - Level 3 [Member] - Common Stock Warrant [Member] - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Junior Note Warrants [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Expected volatility       66.30%
Expected dividend yield 0.00% 0.00% 0.00% 0.00%
Junior Note Warrants [Member] | Minimum [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Stock price $ 0.15 $ 0.03 $ 0.03 $ 0.15
Expected term (in years) 3 years 2 months 12 days 4 years 2 months 12 days 3 years 10 months 24 days 4 years 10 months 24 days
Expected volatility 62.40% 58.90% 58.90%  
Risk-free interest rate 3.70% 3.60% 3.60% 3.80%
Junior Note Warrants [Member] | Maximum [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Stock price $ 0.35 $ 0.51 $ 0.67 $ 0.18
Expected term (in years) 4 years 4 months 24 days 4 years 10 months 24 days 4 years 10 months 24 days 5 years
Expected volatility 182.00% 76.90% 79.60%  
Risk-free interest rate 3.90% 4.30% 4.30% 4.10%
August 2024 Convertible Note Derivative Liability [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Expected dividend yield     0.00%  
August 2024 Convertible Note Derivative Liability [Member] | Minimum [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Stock price     $ 0.51  
Expected term (in years)     4 months 6 days  
Expected volatility     253.00%  
Risk-free interest rate     4.60%  
August 2024 Convertible Note Derivative Liability [Member] | Maximum [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Stock price     $ 1.82  
Expected term (in years)     5 months 15 days  
Expected volatility     285.40%  
Risk-free interest rate     5.00%  
Convertible Notes Receivable [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Expected dividend yield 0.00%      
Convertible Notes Receivable [Member] | Minimum [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Stock price $ 0.000038      
Expected term (in years) 9 months      
Expected volatility 157.70%      
Risk-free interest rate 3.80%      
Convertible Notes Receivable [Member] | Maximum [Member]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Stock price $ 0.000048      
Expected term (in years) 1 year 3 months      
Expected volatility 188.10%      
Risk-free interest rate 4.20%