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Note 7 - Convertible Note Payable (Details Textual) - USD ($)
Sep. 19, 2012
Dec. 29, 2011
Jun. 30, 2017
Dec. 31, 2016
Mar. 26, 2015
Jan. 06, 2014
Mar. 28, 2012
Mar. 08, 2012
Jan. 20, 2012
Liquidity Event Control Change Threshold   50.10%              
Convertible Note Repayment Financing Threshold 4.00%                
Convertible Notes Payable, Current     $ 1,500,000 $ 1,500,000   $ 1,500,000 $ 500,000 $ 500,000 $ 500,000
Gain Contingency, Unrecorded Amount         $ 165,000        
CRA Related Litigation [Member]                  
Gain Contingency, Unrecorded Amount     $ 211,500            
Global Gold Consolidated Resources Limited [Member]                  
Percentage of Approval       75.00%          
Cash Coupon [Member]                  
Debt Instrument, Interest Rate, Stated Percentage   3.00%              
Maximum [Member] | Convertible Notes Payable [Member]                  
Debt Instrument, Face Amount   $ 2,000,000              
Minimum [Member] | Liquidity Event [Member]                  
Debt Instrument, Interest Rate, Stated Percentage   15.00%