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STOCKHOLDERS' EQUITY - Fair value assumptions of options (Details)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2020
Minimum [Member]    
Volatility, minimum 88.37% 186.91%
Expected term (in years) 3 years 1 month 17 days 5 years
Risk-free rate, minimum 2.99% 0.34%
Maximum [Member]    
Volatility, maximum 89.67% 191.05%
Expected term (in years) 4 years 6 years 3 months
Risk-free rate, maximum 3.35% 0.54%