Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS??? EQUITY - Warrants Outstanding (Details)

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STOCKHOLDERS’ EQUITY - Warrants Outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Number of shares      
Outstanding, beginning balance (in shares) 3,908,276 3,777,549  
Exercisable, beginning balance (in shares)   3,777,549  
Issued (in shares) 1,666,666 130,727  
Exercised (in shares) (11,638) 0  
Expired (in shares) (410,907)    
Outstanding, ending balance (in shares) 5,152,397 3,908,276 3,777,549
Exercisable, ending balance (in shares) 5,152,397   3,777,549
Weighted average exercise price      
Outstanding, beginning balance (in dollars per share) $ 5.42 $ 5.42  
Exercisable, beginning balance (in dollars per share)   5.42  
Issued (in dollars per share) 1.88 5.72  
Exercised (in dollars per share) 2.75 0  
Expired (in dollars per share) 0    
Outstanding, ending balance (in dollars per share) 4.71 $ 5.42 $ 5.42
Exercisable, ending balance (in dollars per share) $ 4.71   $ 5.42
Weighted average remaining life (years)      
Outstanding 3 years 4 months 6 days 3 years 5 months 19 days 4 years 5 months 12 days
Exercisable 3 years 4 months 6 days   4 years 5 months 12 days
Aggregate intrinsic value (in thousands)      
Outstanding $ 792 $ 2,020 $ 1,259
Exercisable $ 792   $ 1,259