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STOCKHOLDERS' EQUITY (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
May 12, 2025
USD ($)
d
$ / shares
shares
Apr. 08, 2024
shares
Mar. 26, 2024
$ / shares
shares
Mar. 21, 2024
USD ($)
Jul. 31, 2025
shares
Jun. 30, 2025
shares
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
$ / shares
shares
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Consideration received on transaction | $ $ 21.1     $ 21.9            
Offering price of each common stock (in dollars per share) | $ / shares             $ 0.75   $ 0.75  
Net of placement fees | $ 1.4     1.4            
Proceeds from other offering expenses | $ $ 0.5     $ 0.7            
Common Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Issuance of common stock (in shares)                   24,761,905
Issuance of common stock upon exercise of pre-funded warrants (in shares)   3,800,000     12,000,000.0 22,400,000 12,000,000   34,398,393 3,809,523
Common warrants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of warrants exercised (in shares)                 0  
Pre-funded warrants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of new stock issued during the period (in shares)             34,400,000 3,800,000 34,400,000 3,800,000
Offering price of each common stock (in dollars per share) | $ / shares               $ 1.00   $ 1.00
Warrants outstanding (in shares)             0   0  
Number of warrants exercised (in shares)         12,000,000.0 22,400,000        
Stock price (in dollars per share) | $ / shares             $ 0.01 $ 0.01 $ 0.01 $ 0.01
Direct offering                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Sale of stock, number of shares issued in transaction (in shares) 12,200,000   24,800,000              
Cash placement fees (as a percent)       6.00%            
Direct offering | Common Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Sale of stock, number of shares issued in transaction, per unit (in shares) 1                  
Direct offering | Common Stock And Common Warrant Unit                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Sale of stock, price per share (in dollars per share) | $ / shares $ 0.50                  
Direct offering | Pre-Funded Warrant And Common Warrant Unit                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Sale of stock, price per share (in dollars per share) | $ / shares $ 0.49                  
Direct offering | Common warrants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of new stock issued during the period (in shares) 46,600,000                  
Sale of stock, number of shares issued in transaction, per unit (in shares)     1              
Number of shares of common stock for each Common warrant (in shares) 1   1              
Sale of stock, price per share (in dollars per share) | $ / shares     $ 0.84              
Offering price of each common stock (in dollars per share) | $ / shares $ 0.75                  
Term of warrants 5 years 6 months   5 years 6 months              
Warrants exercisable, period after issuance (in months) 6 months   6 months              
Number of consecutive trading days where the weighted average stock price exceeds threshold | d 10                  
Stock price weighted average threshold (in dollars per share) | $ / shares $ 2.75                  
Direct offering | Pre-funded warrants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Sale of stock, number of shares issued in transaction (in shares)     28,600,000              
Number of new stock issued during the period (in shares) 34,400,000   3,800,000              
Number of shares of common stock for each Common warrant (in shares)     1              
Sale of stock, price per share (in dollars per share) | $ / shares     $ 0.83              
Offering price of each common stock (in dollars per share) | $ / shares $ 0.01   1.00              
Stock price (in dollars per share) | $ / shares     $ 0.01              
Jefferies LLC | At-The-Market Offering Program                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock offering program, maximum value | $                 $ 325.0  
Stock offering program, remaining available amount | $             $ 148.7   $ 148.7  
Issuance of common stock (in shares)             36,400,000 0 57,200,000 0
Consideration received on transaction | $             $ 19.6   $ 37.2