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Note 4 - Management Actions (Details Textual) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2020
Restructuring Charges, Total		$ 3.1	$ 2.0	$ 6.2
Employee Severance [Member]
Restructuring Charges, Total		1.4	1.3
Other Restructuring [Member]
Restructuring Charges, Total		1.7	0.7
Selling, General and Administrative Expenses [Member]
Restructuring Charges, Total		1.9
Selling, General and Administrative Expenses [Member] | Employee Severance [Member]
Restructuring Charges, Total	$ 3.5		1.7
Cost of Sales [Member]
Restructuring Charges, Total		$ 1.2
Inventory Write-down			1.7
Cost of Sales [Member] | Employee Severance [Member]
Restructuring Charges, Total			$ 0.3

X

- Definition

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

+ References

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-Publisher FASB
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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.

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