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Rehabilitation and Closure Cost Provision (Tables)
 12 Months Ended
Apr. 30, 2019
Text block [abstract]  
Description of Changes to the reclamation

Changes to the reclamation and closure cost balance during the year are as follows:

 

     April 30,
2019		      April 30,
2018		  

Balance, beginning of year

    $  1,162      $  1,131  

Accretion expense

      90        64  

Foreign exchange fluctuation

      2        (33 ) 
  

 

 

     

 

 

  

Balance, end of year

    $ 1,254      $ 1,162