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INVENTORY (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2016
Classes of current inventories [abstract]      
Process material stockpiles $ 3,565,892 $ 2,604,720 $ 2,434,943
Concentrate inventory 3,436,879 1,895,808 159,998
Materials and supplies 2,099,486 1,303,484 737,598
Inventories $ 9,102,257 $ 5,804,012 $ 3,332,539