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10. SHAREHOLDERS' EQUITY (Details 2) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Stockholders' Equity:    
Outstanding, Beginning Balance 2,049,133 2,155,065
Granted 0 585,447
Exercised 0 (76,796)
Expired (168,750) (614,583)
Outstanding, Ending Balance 1,880,383 2,049,133
Weighted Average Exercise Price    
Outstanding, Beginning Balance $ 2.55 $ 3.12
Granted 0.00 4.97
Exercised (0.00) (2.77)
Expired (2.84) (6.40)
Outstanding, Ending Balance $ 2.66 $ 2.55