v3.26.1
STOCKHOLDERS' EQUITY (Details)
 3 Months Ended 6 Months Ended
May 05, 2026
USD ($)
$ / shares
shares
Oct. 07, 2025
USD ($)
item
$ / shares
shares
Jul. 02, 2025
USD ($)
$ / shares
shares
Jun. 24, 2025
Jun. 23, 2025
Jun. 18, 2025
Jun. 06, 2025
USD ($)
$ / shares
shares
Jul. 21, 2024
USD ($)
D
$ / shares
shares
Sep. 08, 2023
shares
Jun. 30, 2026
$ / shares
shares
Jun. 30, 2025
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
$ / shares
Jul. 31, 2024
shares
STOCKHOLDERS' EQUITY                              
Additional securities purchase agreement, gross upfront | $ $ 35,000,000                            
Additional securities purchase agreement, net upfront | $ 31,700,000                            
Additional securities purchase agreement, milestone based | $ $ 105,000,000                            
Reverse stock split ratio       0.033   0.033                  
Warrants issued to purchase shares 9,471,086 1,048,094               52,654,122   52,654,122      
Exercise price of warrants (in dollars per share) | $ / shares   $ 5.25                          
Net proceeds from warrant exercises | $                       $ 3 $ 2,251,380    
Warrants issued             0                
Common stock par value | $ / shares                   $ 0.00001   $ 0.00001   $ 0.00001  
Price per warrant | $ / shares   $ 0.125                          
Number of warrants issued | item   2                          
Public offering                              
STOCKHOLDERS' EQUITY                              
Gross proceeds from stockholders' equity | $     $ 6,900,000                        
Registered direct offering                              
STOCKHOLDERS' EQUITY                              
Shares issued 1,618,053                            
Common stock par value | $ / shares $ 0.00001                            
Private placement                              
STOCKHOLDERS' EQUITY                              
Number of consecutive trading days 20 days                            
Exercise price of warrants (in dollars per share) | $ / shares $ 2.65                            
October 2022 Public Offering and Private Placement                              
STOCKHOLDERS' EQUITY                              
Exercise price of warrants (in dollars per share) | $ / shares                   $ 58.8   $ 58.8      
Warrants outstanding                   75,939   75,939      
Common Stock                              
STOCKHOLDERS' EQUITY                              
Conversion of preferred shares into common shares (in shares)                   3,703          
Exercise of warrants into preferred shares (in shares)                     276,044        
Common Stock | Private placement                              
STOCKHOLDERS' EQUITY                              
Number of units issued 2,116,887                            
Minimum                              
STOCKHOLDERS' EQUITY                              
Reverse stock split ratio         0.10                    
Minimum | Private placement                              
STOCKHOLDERS' EQUITY                              
Volume weighted average price | $ / shares $ 3.45                            
Average trading volume | $ $ 500,000                            
Maximum                              
STOCKHOLDERS' EQUITY                              
Reverse stock split ratio         0.033                    
Class A Units | Public offering                              
STOCKHOLDERS' EQUITY                              
Number of units issued     1,045,000                        
Number of shares in a unit     1                        
Price per unit | $ / shares     $ 5                        
Class A Units | Over allotment option                              
STOCKHOLDERS' EQUITY                              
Number of units issued     180,000                        
Class B Unit | Public offering                              
STOCKHOLDERS' EQUITY                              
Number of units issued     335,000                        
Price per unit | $ / shares     $ 4.99999                        
Series E-1 preferred stock | September 2023 Private Placement                              
STOCKHOLDERS' EQUITY                              
Shares issued                 1,225            
Common warrant | Public offering                              
STOCKHOLDERS' EQUITY                              
Warrants term     5 years                        
Exercise price of warrants (in dollars per share) | $ / shares     $ 5.25                        
Common warrant | Class A Units | Public offering                              
STOCKHOLDERS' EQUITY                              
Number of warrants in a unit     1                        
Number of shares of common stock per warrant     1                        
Common warrant | Class B Unit | Public offering                              
STOCKHOLDERS' EQUITY                              
Number of warrants in a unit     1                        
Prefunded Warrant | Class B Unit | Public offering                              
STOCKHOLDERS' EQUITY                              
Number of warrants in a unit     1                        
Number of shares of common stock per warrant     1                        
Existing Warrant                              
STOCKHOLDERS' EQUITY                              
Exercise price of warrants (in dollars per share) | $ / shares             $ 9.123                
Proceeds from exercise of warrants | $             $ 2,500,000                
Exercise of warrants into common shares (in shares)             276,044                
October 2025 Warrant Inducement                              
STOCKHOLDERS' EQUITY                              
Exercise price of warrants (in dollars per share) | $ / shares   $ 6                          
Price paid per warrant | $ / shares   $ 0.125                          
Proceeds from issuance and exercise of warrants | $   $ 5,800,000                          
Tranche A Warrants | Private placement                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares 13,206,026                            
2026 May Tranche C Common Warrants                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares 792,362                 13,206,026   13,206,026      
Exercise price of warrants (in dollars per share) | $ / shares $ 4.1075                 $ 2.65   $ 2.65      
2026 May Placement Agent Warrants                              
STOCKHOLDERS' EQUITY                              
Number of consecutive trading days 20 days                            
Warrants issued to purchase shares                   792,362   792,362      
Exercise price of warrants (in dollars per share) | $ / shares                   $ 4.1075   $ 4.1075      
2026 May Placement Agent Warrants | Minimum                              
STOCKHOLDERS' EQUITY                              
Volume weighted average price | $ / shares $ 5.34                            
2023 Tranche A Preferred Warrants | Series E-3 preferred stock | September 2023 Private Placement                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares                 2,205            
2023 Tranche B Preferred Warrants                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares                   14,652   14,652     14,652
Exercise price of warrants (in dollars per share) | $ / shares                   $ 143.25   $ 143.25      
Warrants outstanding                             105
2023 Tranche B Preferred Warrants | Series E-4 preferred stock                              
STOCKHOLDERS' EQUITY                              
Preferred stock, par value (in dollars per share) | $ / shares               $ 0.00001              
Number of shares issuable upon conversion of preferred stock               224,663              
Conversion price per share | $ / shares               $ 75.6              
Net proceeds from warrant exercises | $               $ 17,500,000              
Proceeds from exercise of warrants | $               $ 19,400,000              
Exercise of warrants into preferred shares (in shares)               1,610              
2023 Tranche B Preferred Warrants | Series E-4 preferred stock | September 2023 Private Placement                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares                 1,715            
2024 Tranche A Warrants                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares                   114,773   114,773      
Exercise price of warrants (in dollars per share) | $ / shares               $ 75.6   $ 75.6   $ 75.6      
Number of Days following the Announcement of Prescription Drug Use Fee Act Goal By FDA | D               10              
2024 Tranche B Warrants                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares                   139,877   139,877      
Exercise price of warrants (in dollars per share) | $ / shares               $ 120   $ 120   $ 120      
Number of days following the date of the Company's public announcement of its receipt of written approval from the FDA | D               10              
2024 Tranche C Warrants                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares                   72,663   72,663      
Exercise price of warrants (in dollars per share) | $ / shares               $ 165   $ 165   $ 165      
Number of days following the announcement of quarterly gross revenue from sales of iopofosine I 131. | D               10              
Threshold amount of quarterly gross revenues trigger for expiry of warrants | $               $ 10,000,000              
2022 Common Warrants                              
STOCKHOLDERS' EQUITY                              
Warrants issued to purchase shares                   75,939   75,939      
Exercise price of warrants (in dollars per share) | $ / shares                   $ 58.8   $ 58.8      
2025 Representative Warrants                              
STOCKHOLDERS' EQUITY                              
Warrants term     5 years                        
Warrants issued to purchase shares     82,800             82,800   82,800      
Exercise price of warrants (in dollars per share) | $ / shares     $ 7.75             $ 7.75   $ 7.75