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SHARE CAPITAL AND SHARE-BASED PAYMENTS (Details) - $ / shares
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of continuing involvement in derecognised financial assets [line items]    
Outstanding and exercisable underlying shares, Beginning 10,778,061  
Stock options [Member]    
Disclosure of continuing involvement in derecognised financial assets [line items]    
Outstanding and exercisable underlying shares, Beginning 2,917,500 3,311,000
Granted 526,000 497,500
Cancelled / Forfeited (255,000) (497,500)
Expired (550,000) (306,000)
Exercised (87,500)
Stock options outstanding, Ending 2,638,500 2,917,500
Stock options exercisable 2,244,000 2,576,250
Outstanding and exercisable Weighted Average Exercise Price, Beginning $ 2.04 $ 2.12
Granted 0.79 1.30
Cancelled / Forfeited 2.09 2.14
Expired 1.90 1.61
Exercised 1.61
Stock options outstanding 1.82 2.04
Stock options exercisable $ 2.00 $ 2.14