Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY, Warrants (Details)

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STOCKHOLDERS' EQUITY, Warrants (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 08, 2020
Dec. 31, 2021
Dec. 31, 2020
Warrants [Abstract]      
Warrant exercise price (in dollars per share)   $ 2.82 $ 2.82
Common Stock [Member]      
Warrants [Abstract]      
Warrants outstanding (in shares)   4,528,160 4,528,160
Perceptive Tranche IV Warrant [Member]      
Warrants [Abstract]      
Warrant to purchase shares of common stock (in shares) 2,390,000    
Warrant exercise price (in dollars per share) $ 1.94    
Fair value of warrants $ 3.7    
Expected term   10 years  
Volatility 69.30%    
Dividend yield 0.00%    
Risk-free interest rate 0.92%