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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2021
STOCK-BASED COMPENSATION [Abstract]  
Weighted-Average Assumptions Used for Grants Issued

The following weighted-average assumptions were used for grants issued during the three and nine months ended September 30, 2021:
 
 
 
Three months ended
September 30, 2021
   
Nine months ended
September 30, 2021
 
Weighted average risk-free rate
    0.97 %     1.06 %
Weighted average volatility
    143.29 %     134.88 %
Dividend yield
    0 %     0 %
Expected term
  6.08 years
   
6.08 years