Note 1 - Summary of Significant Accounting Policies - Schedule of Property, Plant and Equipment, Useful Life (Details)	9 Months Ended
	Sep. 30, 2019
Leasehold Improvements [Member]
Property, plant, and equipment, useful life (Year)	2 years
Demo Equipment [Member]
Property, plant, and equipment, useful life (Year)	3 years
Laboratory Equipment [Member]
Property, plant, and equipment, useful life (Year)	4 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