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Note 6 - Property, Plant and Equipment (Tables)
 9 Months Ended
Apr. 30, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
April 30, 2021
    
July 31, 2020
  
   
Cost
    
Accumulated

Depreciation
    
Net Book

Value
    
Cost
    
Accumulated
Depreciation
    
Net Book
Value
  
Hobson Processing Facility
  
$
6,642,835
    
$
(831,789
)
  
$
5,811,046
     $
6,642,835
     $
(773,933
 )   $
5,868,902
  
Mining Equipment
  
 
2,355,379
    
 
(2,314,364
)
  
 
41,015
      
2,393,579
      
(2,342,518
 )    
51,061
  
Logging Equipment and Vehicles
  
 
1,923,983
    
 
(1,761,956
)
  
 
162,027
      
1,924,969
      
(1,736,806
 )    
188,163
  
Computer Equipment
  
 
333,318
    
 
(285,517
)
  
 
47,801
      
550,243
      
(486,467
 )    
63,776
  
Furniture and Fixtures
  
 
184,941
    
 
(171,462
)
  
 
13,479
      
170,701
      
(169,946
 )    
755
  
Land and Buildings
  
 
1,377,601
    
 
(53,603
)
  
 
1,323,998
      
889,606
      
(42,446
 )    
847,160
  
   
$
12,818,057
    
$
(5,418,691
)
  
$
7,399,366
     $
12,571,933
     $
(5,552,116
 )   $
7,019,817