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Note 9 - Commitments (Details Textual)
3 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
ft²
Mar. 31, 2018
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2014
GBP (£)
Operating Leases, Rent Expense, Net, Total $ 8,188 $ 6,192    
Royalty Expense $ 9,416 $ 5,285    
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  
Netanya, Israel Lease [Member]        
Lessee, Operating Lease, Term of Contract 1 year      
Facility in Vancouver, Canada [Member]        
Lessee, Operating Lease, Term of Contract 5 years      
Lessee, Operating Lease, Area of Property | ft² 1,459