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STOCK-BASED COMPENSATION - Schedule of stock option activity (Details) - $ / shares
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2025
Dec. 31, 2024
Number of Options        
Beginning Balance (in shares) 175,662 147,616 147,616  
Granted (in shares) 0   28,057  
Exercised (in shares) 0   0  
Forfeited (in shares) 0   (11)  
Expired (in shares) (59)   (59)  
Ending Balance (in shares) 175,603 175,662 175,603 147,616
Exercisable (in shares) 107,388   107,388  
Weighted Average Exercise Price Per Share        
Beginning Balance (in dollars per share) $ 23.14 $ 27.13 $ 27.13  
Granted (in dollars per share) 0   3.09  
Exercised (in dollars per share) 0   0  
Forfeited (in dollars per share) 0   2,497.7  
Expired (in dollars per share) 4,658.85   4,658.85  
Ending Balance (in dollars per share) 21.58 $ 23.14 21.58 $ 27.13
Exercisable (in dollars per share) $ 33.24   $ 33.24  
Weighted Average Remaining Contractual Term (years)        
Outstanding 8 years 9 months 18 days 9 years 1 month 6 days 8 years 9 months 18 days 9 years 6 months
Granted     9 years 6 months  
Exercisable     8 years 8 months 12 days  
Stock Options, Inducement Awards        
Number of Options        
Ending Balance (in shares) 603   603