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Note 4 - Management Actions - Reconciliation of Liability Balance of Severance and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Dec. 31, 2020
Balance		$ 4.5	$ 4.5	$ 4.5
New charges	$ 3.1	$ 2.0	0.9	6.2
Cash payments			(1.2)	(5.4)
Foreign currency fluctuations			(0.1)	0.2
Adjustments to accrual				(1.0)
Balance			$ 4.1	$ 4.5

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 1
-Subparagraph (b)(2)
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X

- Definition

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.

+ References

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

+ References

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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