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CAPITAL STOCK (Details) - USD ($)
$ / shares in Units, $ in Millions
 4 Months Ended 12 Months Ended
Apr. 22, 2025
Mar. 19, 2025
Apr. 07, 2022
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jul. 23, 2025
Jul. 21, 2025
Feb. 28, 2025
Sep. 09, 2024
Jan. 29, 2024
Class of Stock [Line Items]                        
Common stock, authorized (in shares)       350,000,000 350,000,000 350,000,000            
Common stock, par value (in dollars per share)       $ 0.00001 $ 0.00001 $ 0.00001            
Common stock, outstanding (in shares)       224,848,992 265,424,818 224,848,992            
Common stock, issued (in shares)       224,848,992 265,424,818 224,848,992            
Preferred stock, authorized (in shares)       25,000,000 25,000,000 25,000,000            
Preferred stock, par value (in dollars per share)       $ 0.00001 $ 0.00001 $ 0.00001            
Preferred stock, outstanding (in shares)       0 0 0            
Preferred stock, shares issued       0 0 0            
Issuance and sale of equity securities                     $ 75.0  
Warrant to purchase common stock (in shares)               1,408,588 2,115,384 1,153,846   3,076,923
Exercise price (in dollars per share)                 $ 1.30 $ 1.30   $ 1.30
Warrant exercise period (in years)                   8 years    
Warrant purchased (in shares)                 2,115,384      
Warrants issued (in shares)                 1,408,588      
Vifor (International) Ltd. | License                        
Class of Stock [Line Items]                        
Unregistered stock held by customer (in shares)         7,571,429              
At-The-Market Sale Agreement, Authorized April 2022                        
Class of Stock [Line Items]                        
Number of shares sold in offering (in shares)           13,261,311 6,189,974          
Sale of stock, consideration received, gross           $ 19.2 $ 6.8          
Aggregate net proceeds from offering           $ 18.7 $ 6.7          
At-The-Market Sale Agreement, Authorized April 2022, Amended                        
Class of Stock [Line Items]                        
Number of shares sold in offering (in shares)       14,271,631 9,437,364              
Sale of stock, consideration received, gross       $ 24.3 $ 18.7              
Aggregate net proceeds from offering       $ 23.8 $ 18.4              
Public Stock Offering                        
Class of Stock [Line Items]                        
Number of shares sold in offering (in shares)   25,000,000                    
Aggregate net proceeds from offering $ 1.6 $ 46.5                    
Sale of stock, price per share (in dollars per share)   $ 2.00                    
Public Stock Offering - Underwriting Agreement                        
Class of Stock [Line Items]                        
Sale of stock, price per share (in dollars per share)   $ 1.88                    
Over-Allotment Option                        
Class of Stock [Line Items]                        
Number of shares sold in offering (in shares) 850,000 3,750,000                    
Underwriters allotment option, term (in days)   30 days                    
Maximum | At-The-Market Sale Agreement, Authorized April 2022                        
Class of Stock [Line Items]                        
Common stock sales agreement amount     $ 26.0