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STOCKHOLDERS' EQUITY - Share Purchase Warrants (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
STOCKHOLDERS' EQUITY    
Number of Warrants, Beginning balance 20,830,000  
Number of Warrants, Ending balance 20,830,000 20,830,000
Weighted Average Exercise Price, Beginning Balance $ 4.47  
Weighted Average Exercise Price, Ending Balance $ 4.47 $ 4.47
Weighted Average Remaining Contractual Life (in years) 2 years 1 month 9 days 2 years 7 months 6 days
Total Intrinsic Value $ 0 $ 0