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3. Revenue Recognition (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenues $ 5,235,530 $ 8,268,005
Antimony    
Revenues 2,942,628 5,450,649
Zeolite    
Revenues 2,118,823 2,623,117
Precious Metals    
Revenues $ 174,079 $ 194,239