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STOCK-BASED COMPENSATION - Schedule of stock option activity (Details) - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Number of Options    
Beginning Balance (in shares) 175,578  
Granted (in shares) 1,053,288  
Exercised (in shares) 0  
Forfeited (in shares) (10,002)  
Expired (in shares) (140)  
Ending Balance (in shares) 1,218,724 175,578
Exercisable (in shares) 171,312  
Weighted Average Exercise Price Per Share    
Beginning Balance (in dollars per share) $ 20.75  
Granted (in dollars per share) 1.61  
Exercised (in dollars per share) 0  
Forfeited (in dollars per share) 3.36  
Expired (in dollars per share) 3,985.71  
Ending Balance (in dollars per share) 3.89 $ 20.75
Exercisable (in dollars per share) $ 17.72  
Weighted Average Remaining Contractual Term (years)    
Outstanding 9 years 3 months 18 days 8 years 9 months 18 days
Granted 9 years 10 months 24 days  
Exercisable 5 years 7 months 6 days  
Stock Options, Inducement Awards    
Number of Options    
Ending Balance (in shares) 603