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BASIS OF REPORTING AND SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]  
Property Plant And Equipment Estimated Useful Lives [Table Text Block]
Property and equipment are carried at cost net of accumulated depreciation and amortization. Depreciation and amortization is computed on the straight-line method over the estimated useful lives of the assets, or the life of the lease, whichever is shorter, as follows:
 
  Estimated 
  Useful Life (years) 
Building and Building Improvements  
5 – 40
 
Mining equipment  
2 – 7
 
Office and shop furniture and equipment  
3 – 7
 
Vehicles  5