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INCOME TAXES (Details 3) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2016
Dec. 31, 2015
Disclosure of other provisions [line items]        
Reclamation provision $ 11,638,157 $ 6,962,911 $ 4,369,486 $ 4,369,486
Inventory 9,102,257 5,804,012 3,332,539  
Exploration and evaluation assets 43,337,870 30,791,736 29,896,658 29,896,658
Plant, equipment and mining properties 31,951,605 27,738,747 18,593,232 $ 18,593,232
Net deferred income tax liabilities (4,548,000) (4,688,315) (3,535,344)  
Deferred income tax assets and liabilities [Member]        
Disclosure of other provisions [line items]        
Reclamation provision 594,158 502,586 566,004  
Non-capital losses 3,196,459  
Other deductible temporary differences 1,096,977 2,328,101 757,087  
Inventory (229,615) (100,669) (132,901)  
Exploration and evaluation assets (6,463,733) (4,265,292) (2,519,341)  
Plant, equipment and mining properties (2,742,246) (3,153,041) (2,206,193)  
Net deferred income tax liabilities $ (4,548,000) $ (4,688,315) $ (3,535,344)