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STOCKHOLDERS' (DEFICIT) EQUITY - Stock options (excluding market-based option awards) (Details) - $ / shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 0.74  
Options Outstanding, Number of Options 722,716 640,216
Options Exercisable, Weighted Average Remaining Term (In Years) 1 year 2 months 12 days  
Options Exercisable Number of Options 389,522  
$0.62 - $0.99    
STOCKHOLDERS' EQUITY    
Options Outstanding, Number of Options 325,486  
Options Exercisable, Weighted Average Remaining Term (In Years) 6 months  
Options Exercisable Number of Options 253,542  
$0.62 - $0.99 | Minimum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 0.62  
$0.62 - $0.99 | Maximum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 0.99  
$1.21 - $1.50    
STOCKHOLDERS' EQUITY    
Options Outstanding, Number of Options 155,000  
Options Exercisable, Weighted Average Remaining Term (In Years) 4 years  
Options Exercisable Number of Options 46,250  
$1.21 - $1.50 | Minimum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 1.21  
$1.21 - $1.50 | Maximum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 1.50  
$1.55 - $1.99    
STOCKHOLDERS' EQUITY    
Options Outstanding, Number of Options 82,500  
Options Exercisable, Weighted Average Remaining Term (In Years) 3 years 3 months 18 days  
Options Exercisable Number of Options 27,500  
$1.55 - $1.99 | Minimum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 1.55  
$1.55 - $1.99 | Maximum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 1.99  
$2.05 - $2.44    
STOCKHOLDERS' EQUITY    
Options Outstanding, Number of Options 159,730  
Options Exercisable, Weighted Average Remaining Term (In Years) 2 years 10 months 24 days  
Options Exercisable Number of Options 62,230  
$2.05 - $2.44 | Minimum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 2.05  
$2.05 - $2.44 | Maximum    
STOCKHOLDERS' EQUITY    
Options Outstanding, Exercise Price $ 2.44