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SIGNIFICANT ACCOUNTING POLICIES - Stock-based compensation expense (Details) - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
SIGNIFICANT ACCOUNTING POLICIES    
Stock-based compensation expense $ 907,000 $ 883,000
Options    
SIGNIFICANT ACCOUNTING POLICIES    
Stock-based compensation expense   4,000
RSUs    
SIGNIFICANT ACCOUNTING POLICIES    
Stock-based compensation expense 857,000 813,000
Outstanding unamortized share-based compensation expense 6,062,000  
Unrestricted Shares of Common Stock    
SIGNIFICANT ACCOUNTING POLICIES    
Stock-based compensation expense $ 50,000 $ 66,000