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Note 3 - Property and Equipment
 9 Months Ended
Feb. 28, 2019
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
3.
PROPERTY AND EQUIPMENT
 
    Computer Equipment     Vehicles     Tent     Total  
                         
Cost                                
Balance, May 31, 2018   $
83,619
     $
88,328
     $
64,740
     $
236,687
  
Additions    
1,769
      
—  
      
—  
      
1,769
  
Currency translation adjustments    
1,035
      
1,507
      
1,105
      
3,647
  
                                 
Balance, February 28, 2019   $
86,423
     $
89,835
     $
65,845
     $
242,103
  
                                 
Depreciation                                
Balance, May 31, 2018   $
60,144
     $
79,178
     $
40,875
     $
180,197
  
Depreciation for the period    
5,530
      
2,092
      
3,640
      
11,262
  
Currency translation adjustments    
806
      
1,352
      
699
      
2,857
  
                                 
Balance, February 28, 2019   $
66,480
     $
82,622
     $
45,214
     $
194,316
  
                                 
Carrying amounts                                
                                 
Balance, May 31, 2018   $
23,475
     $
9,150
     $
23,865
     $
56,490
  
                                 
Balance, February 28, 2019   $
19,943
     $
7,213
     $
20,631
     $
47,787