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EXPLORATION EXPENDITURES
6 Months Ended
Dec. 31, 2020
Oil and Gas Exploration and Production Industries Disclosures [Abstract]  
EXPLORATION EXPENDITURES
  9. Exploration Expenditures

 

    For the Three Months Ended
December 31,
    For the Six Months Ended
December 31,
 
    2020     2019     2020     2019  
  Technical studies and engineering   $     $ 6     $     $ 23  
  Field management and other     146       405       328       570  
  Metallurgical development     41       43       84       84  
Total   $ 187     $ 454     $ 412     $ 677