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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
6 Months Ended
Jun. 30, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]  
Calculation of Diluted Loss Per Common Share For the six months ended June 30, 2021 and 2020, the following securities were excluded from the calculation of diluted loss per common share because of their anti-dilutive effects:

   
For the Six Months Ended June 30,
 
   
2021
   
2020
 
Stock options
   
7,783,029
     
6,801,779
 
Restricted stock units
   
686,133
     
326,000
 
Warrants
   
4,528,160
     
2,138,160
 
     
12,997,322
     
9,265,939