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Note 6 - Property and Equipment - Property, Plant, and Equipment Useful Life (Details) (Parentheticals) - Minimum [Member]
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Estimated Useful Life (Year) 3 years  
Machinery and Equipment [Member]    
Estimated Useful Life (Year) 5 years 7 years
Furniture and Fixtures [Member]    
Estimated Useful Life (Year) 3 years 5 years
Leasehold Improvements [Member]    
Estimated Useful Life (Year) 5 years 7 years