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Commitments and contingencies (Tables)
12 Months Ended
Dec. 31, 2019
Disclosure of commitments and contingent liabilities [text block] [Abstract]  
Schedule of commitments and contingencies [Table Text Block]
  Payments due by years
($000s) Total 2020 2021-22 2023-24 2025-26
Mineral interests 9,715 826 1,992 3,372 3,525
Flow-through share expenditures 441 441             -             -            -
  10,156 1,267 1,992 3,372 3,525