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Note 7 - Notes Payable (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2014
Aug. 31, 2014
Apr. 01, 2014
Sep. 20, 2012
Jul. 23, 2012
Apr. 17, 2012
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Oct. 21, 2015
Oct. 17, 2015
Aug. 21, 2015
Aug. 17, 2015
Oct. 17, 2014
Note Payable Mining Equipment 2 [Member]                                  
Debt Instrument, Face Amount           $ 40,565                      
Debt Instrument, Interest Rate, Effective Percentage           11.279%                      
Debt Instrument, Periodic Payment           $ 950         $ 6,060 $ 6,060          
Debt Instrument, Term           4 years                      
Note Payable Mining Equipment 3 [Member]                                  
Debt Instrument, Face Amount         $ 169,500                        
Debt Instrument, Periodic Payment         $ 6,060       $ 1,339   9,122 9,122          
Debt Instrument, Term         2 years 180 days                        
Debt Instrument, Interest Rate, Stated Percentage         5.50%                        
Note Payable for Laboratory Equipment [Member]                                  
Debt Instrument, Face Amount     $ 91,229                            
Debt Instrument, Periodic Payment     $ 9,122                            
Debt Instrument, Term     300 days                            
Note Payable, Mining Equipment, Purchased in October 2014 [Member]                                  
Debt Instrument, Face Amount $ 57,900 $ 57,900                              
Debt Instrument, Periodic Payment $ 1,339 $ 1,339                              
Debt Instrument, Term 4 years 4 years                              
Debt Instrument, Interest Rate, Stated Percentage 5.20% 5.20%                              
Note Payable Mining Site Vehicle [Member]                                  
Debt Instrument, Face Amount       $ 37,701                          
Debt Instrument, Periodic Payment       $ 628         628   628 628          
Debt Instrument, Term       5 years                          
Note Payable Insurance Company [Member]                                  
Debt Instrument, Periodic Payment                     21,531 21,531          
Debt Instrument, Interest Rate, Stated Percentage                                 3.15%
Note Payable Insurance Company 1 [Member]                                  
Debt Instrument, Interest Rate, Stated Percentage                         11.845% 3.00% 11.845% 3.00% 4.732%
Laboratory Equipment [Member]                                  
Property, Plant and Equipment, Gross     $ 109,493               594,451 594,451          
Mining Equipment [Member]                                  
Property, Plant and Equipment, Gross $ 65,120 $ 65,120                 1,697,583 1,684,197          
Property, Plant and Equipment, Gross                     8,994,574 9,538,198          
Debt Instrument, Periodic Payment, Interest             $ 2,909 $ 1,776 $ 4,204 $ 5,974 $ 12,839 $ 10,460