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Note 1 - Summary of Significant Accounting Policies - Schedule of Property, Plant and Equipment, Useful Life (Details)
12 Months Ended
Dec. 31, 2017
Leasehold Improvements [Member]  
Property, plant, and equipment, useful life (Year) 5 years
Demo Equipment [Member]  
Property, plant, and equipment, useful life (Year) 3 years
Minimum [Member] | Office Equipment [Member]  
Property, plant, and equipment, useful life (Year) 3 years
Minimum [Member] | Manufacturing Tooling [Member]  
Property, plant, and equipment, useful life (Year) 3 years
Maximum [Member] | Office Equipment [Member]  
Property, plant, and equipment, useful life (Year) 7 years
Maximum [Member] | Manufacturing Tooling [Member]  
Property, plant, and equipment, useful life (Year) 7 years