Note 13 - Restructuring Liabilities (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) Position
Restructuring Cost And Reserve [Line Items]
Restructuring Costs | $	$ 2
Outside of the United States and Canada [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	35
Manufacturing Service Positions [Member] | Outside of the United States and Canada [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	10
Administrative and Sales Positions [Member] | Outside of the United States and Canada [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	25
Restructuring costs and other [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Costs | $	$ 2