Note 4 - Management Actions - Reconciliation of Liability Balance of Severance and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Dec. 31, 2020
Balance		$ 4.5	$ 4.5	$ 4.5
New charges	$ 3.1	$ 2.0	0.9	6.2
Cash payments			(2.3)	(5.4)
Foreign currency fluctuations			(0.2)	0.2
Adjustments to accrual				(1.0)
Balance			$ 2.9	$ 4.5

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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