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SIGNIFICANT ACCOUNTING POLICIES - Stock-based compensation expense (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
SIGNIFICANT ACCOUNTING POLICIES        
Stock-based compensation expense $ 1,281,000 $ 1,190,000 $ 3,693,000 $ 3,048,000
Options        
SIGNIFICANT ACCOUNTING POLICIES        
Stock-based compensation expense       5,000
RSUs        
SIGNIFICANT ACCOUNTING POLICIES        
Stock-based compensation expense 1,194,000 1,077,000 3,431,000 2,743,000
Outstanding unamortized share-based compensation expense 4,200,000   4,200,000  
Unrestricted Shares of Common Stock        
SIGNIFICANT ACCOUNTING POLICIES        
Stock-based compensation expense $ 87,000 $ 113,000 242,000 291,000
Employee stock purchase plan        
SIGNIFICANT ACCOUNTING POLICIES        
Stock-based compensation expense     $ 20,000 $ 9,000