Note 3 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Net Sales		$ 263.3	$ 252.1
Sales Channel, Directly to Consumer [Member]
Net Sales		169.0	167.6
Sales Channel, Through Intermediary [Member]
Net Sales		94.3	84.5
Equipment Sales [Member]
Net Sales		160.9	154.2
Parts and Consumables [Member]
Net Sales		62.3	54.2
Specialty Service Coatings [Member]
Net Sales	[1]	1.5	6.1
Service and Other [Member]
Net Sales		38.6	37.6
Americas [Member]
Net Sales		157.8	162.6
EMEA [Member]
Net Sales		80.9	72.0
Asia Pacific [Member]
Net Sales		$ 24.6	$ 17.5

[1] On February 1, 2021, we sold our coatings business. Further details regarding the sale are discussed in Note 5.