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Provision for reclamation liabilities (Tables)
12 Months Ended
Dec. 31, 2019
Disclosure of other liabilities [text block] [Abstract]  
Schedule of provision for reclamation liabilities [Table Text Block]
($000s) December 31, 2019 December 31, 2018
Beginning of the period              8,069                       2,481
Revised Johnny Mountain Mine closure                   -                          7,439
Disbursements             (1,325)                      (2,022)
Accretion                 121                          169
End of the period              6,865                       8,069
     
Provision for reclamation liabilities - current              1,860                          955
Provision for reclamation liabilities - long-term              5,005                       7,114
  6,865 8,069