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Note 3 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net sales	$ 258.1	$ 263.3
Sales Channel, Directly to Consumer [Member]
Net sales	163.8	169.0
Sales Channel, Through Intermediary [Member]
Net sales	94.3	94.3
Equipment Sales [Member]
Net sales	158.1	160.9
Parts and Consumables [Member]
Net sales	60.6	62.3
Specialty Service Coatings [Member]
Net sales	0.0	1.5
Service and Other [Member]
Net sales	39.4	38.6
Americas [Member]
Net sales	160.3	157.8
EMEA [Member]
Net sales	78.7	80.9
Asia Pacific [Member]
Net sales	$ 19.1	$ 24.6

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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