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8. Long - Term Debt (Details) - USD ($)
Sep. 30, 2016
Dec. 31, 2015
Total debt $ 1,882,881 $ 1,899,032
Less current portion (368,563) (181,287)
Noncurrent portion 1,514,318 1,717,745
First Security    
Total debt 20,700 27,845
Cat Financial Services    
Total debt 41,647  
Wells fargo bank    
Total debt 1,865 5,398
De Lage Landen Financial Services    
Total debt   2,172
De Lage Landen Financial Services 1    
Total debt 21,766 27,587
De Lage Landen Financial Services 2    
Total debt 24,115 29,300
Phyllis Rice    
Total debt 14,146 14,146
Soyatal Mine    
Total debt 787,557 820,272
Guadalupe Mine    
Total debt $ 971,085 $ 972,312