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Note 5 - Property, Plant and Equipment (Tables)
 6 Months Ended
Jan. 31, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
January 31, 2021
    
July 31, 2020
  
   
Cost
   
Accumulated

Depreciation
   
Net Book

Value
   
Cost
    
Accumulated
Depreciation
    
Net Book
Value
  
Hobson Processing Facility
  
$
6,642,835
   
$
(812,504
)
  
$
5,830,331
     $
6,642,835
     $
(773,933
 )   $
5,868,902
  
Mining Equipment
  
 
2,393,579
   
 
(2,349,914
)
  
 
43,665
      
2,393,579
      
(2,342,518
 )    
51,061
  
Logging Equipment and Vehicles
  
 
1,935,469
   
 
(1,760,511
)
  
 
174,958
      
1,924,969
      
(1,736,806
 )    
188,163
  
Computer Equipment
  
 
528,113
   
 
(472,803
)
  
 
55,310
      
550,243
      
(486,467
 )    
63,776
  
Furniture and Fixtures
  
 
184,941
   
 
(170,623
)
  
 
14,318
      
170,701
      
(169,946
 )    
755
  
Land and Buildings
  
 
1,377,601
   
 
(49,884
)
  
 
1,327,717
      
889,606
      
(42,446
 )    
847,160
  
   
$
13,062,538
   
$
(5,616,239
)
  
$
7,446,299
     $
12,571,933
     $
(5,552,116
 )   $
7,019,817