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STOCK-BASED COMPENSATION - Narratives (Details)
 1 Months Ended 12 Months Ended
Jun. 30, 2024
shares
Dec. 31, 2024
USD ($)
item
$ / shares
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
shares
STOCK-BASED COMPENSATION        
Number of long-term incentive plans | item   2    
Common stock remaining for issuance | shares   12,341,914 10,548,174 9,474,824
Stock-based compensation | $   $ 3,800,000 $ 4,200,000  
Grant date exercise price range | $ / shares   $ 0.91    
Total unrecognized compensation cost related to stock options | $   $ 3,035,000 $ 4,868,000  
Amortized period   32 months 42 months  
Compensation expense | $   $ 538,000 $ 842,000  
Restricted stock units        
STOCK-BASED COMPENSATION        
Stock-based compensation | $   600,000 $ 900,000  
Stock or unit option plan expense | $   $ 0    
Vesting period   43 months 37 months  
Employee stock options        
STOCK-BASED COMPENSATION        
Stock-based compensation | $   $ 3,200,000 $ 3,300,000  
2006 Stock Option Plan        
STOCK-BASED COMPENSATION        
Common stock reserved for issuance | shares   2,400,000    
Common stock remaining for issuance | shares   654,000 654,000  
2014 Stock Option Plan        
STOCK-BASED COMPENSATION        
Common stock reserved for issuance | shares 20,900,000 20,900,000    
Common stock remaining for issuance | shares   3,700,000 647,000  
Shares reserved for future issuance | shares 7,500,000