Note 3 - Summary of Significant Accounting Policies - Property, Plant, and Equipment Weighted Average Useful Life (Details)	3 Months Ended
	Mar. 31, 2018
Machinery and Equipment [Member]
Property, plant, and equipment, weighted average useful life (Year)	5 years
Computer Equipment [Member]
Property, plant, and equipment, weighted average useful life (Year)	3 years
Furniture and Fixtures [Member]
Property, plant, and equipment, weighted average useful life (Year)	5 years
Software Licenses [Member] | Minimum [Member]
Property, plant, and equipment, weighted average useful life (Year)	1 year
Software Licenses [Member] | Maximum [Member]
Property, plant, and equipment, weighted average useful life (Year)	3 years
Office Equipment [Member]
Property, plant, and equipment, weighted average useful life (Year)	3 years