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Note 9 - Commitments and Contingencies (Details Textual)
1 Months Ended 12 Months Ended
Mar. 01, 2018
USD ($)
ft²
Nov. 29, 2016
USD ($)
$ / shares
shares
Oct. 31, 2016
USD ($)
Jul. 31, 2014
USD ($)
Jul. 31, 2014
GBP (£)
Dec. 31, 2016
USD ($)
Jun. 30, 2018
USD ($)
Jul. 30, 2014
Estimated Litigation Liability             $ 1,275,000  
Common Stock Issued and Outstanding Percentage Decrease   3.00%            
Gain (Loss) Related to Litigation Settlement, Total           $ (2,200,000)    
Accounts Payable and Accrued Liabilities [Member]                
Estimated Litigation Liability             425,000  
Other Noncurrent Liabilities [Member]                
Estimated Litigation Liability             $ 850,000  
Executive Officer [Member]                
Stock Cancelled During Period, Shares | shares   1,890,000            
Litigation Settlement, Amount Awarded to Other Party   $ 2,700,000            
Payments for Legal Settlements   1,000,000            
Payments for Legal Settlements by Insurance Carrier   500,000            
Estimated Litigation Liability   $ 1,700,000            
Payments For Legal Settlements, Installment Terms   48            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period | shares   6,600,000            
Minimum [Member] | Executive Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price | $ / shares   $ 0.15            
Maximum [Member] | Executive Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price | $ / shares   $ 0.31            
Office Space In Newport Beach California [Member]                
Additional Area of Land | ft² 1,332              
Area of Land | ft² 11,728              
Office Space In Newport Beach California [Member] | Minimum [Member]                
Operating Lease Monthly Rent $ 38,702              
Office Space In Newport Beach California [Member] | Maximum [Member]                
Operating Lease Monthly Rent $ 44,566              
Sublease in Newport Beach [Member]                
Operating Lease Monthly Rent     $ 4,100          
Lessor, Operating Lease, Term of Contract     1 year 270 days          
Office Space in London England [Member]                
Operating Lease Monthly Rent       $ 115,000 £ 89,667      
Lessee, Operating Lease, Term of Contract               5 years
Operating Lease Service Charges       $ 56,000 £ 45,658