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Note 7 - Equity Investment (Details Textual) - Sisecam Wyoming [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity Method Investment, Ownership Percentage	49.00%		49.00%
Reclassification Out Of Accumulated Other Comprehensive Income (Loss)	$ 0.9	$ (1.2)	$ (17.4)	$ (5.7)

X

- Definition

Represents reclassification out of accumulated other comprehensive income (loss)

+ References

No definition available.

+ Details

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X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

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- Details

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