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Note 9 - Commitments (Details Textual)
12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2014
GBP (£)
Operating Leases, Rent Expense, Net $ 19,018 $ 26,152    
Royalty Expense $ 12,888 $ 499    
Executive Chairman [Member]        
Consulting Agreement, Monthly Payment, Percentage     2.50% 2.50%
Executive Chairman [Member] | Minimum [Member]        
Consulting Agreement, Monthly Payment     $ 11,000  
Executive Chairman [Member] | Maximum [Member]        
Consulting Agreement, Monthly Payment     $ 25,000  
Chief Executive Officer [Member]        
Consulting Agreement, Monthly Payment, Percentage     2.50% 2.50%
Consulting Agreement, Monthly Payment | £       £ 5,000
Chief Executive Officer [Member] | Minimum [Member]        
Consulting Agreement, Monthly Payment     $ 7,500  
Chief Executive Officer [Member] | Maximum [Member]        
Consulting Agreement, Monthly Payment     $ 25,000