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10. SHAREHOLDERS' EQUITY (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Number of Options    
Outstanding, Beginning Balance 132,500 77,500
Granted 0 62,500
Exercised 0 (2,500)
Expired 0 (5,000)
Outstanding, Ending Balance 132,500 132,500
Weighted Average Exercise Price    
Outstanding, Beginning Balance $ 2.72 $ 2.56
Granted 0.00 3.96
Exercised 0.00 0.40
Expired 0.00 16.8
Outstanding, Ending Balance $ 2.72 $ 2.72