Note 6 - Property and Equipment (Details) - Property, Plant, and Equipment Useful Life (Parentheticals)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years	7 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years	5 years
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years	5 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years	7 years