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Note 8 - Equity in earnings of non-consolidated companies (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	May 17, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Bargain purchase gain		$ 3,162
Impairment loss on non-consolidated companies			34,041
PAO Severstal
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Impairment loss on non-consolidated companies		14,900	14,900
Usiminas
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Impairment loss on non-consolidated companies		19,100	19,100
Global Pipe Company
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Remeasurement of previously held interest	$ 4,500	4,506
Bargain purchase gain	$ 11,500	$ 11,487

X

- Definition

The gain (loss) recognised as result of remeasuring to fair value the equity interest in the acquiree held by the acquirer before the business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2023-01-01
-Paragraph B64
-Subparagraph p
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2023-en-r&anchor=para_B64_p_ii&doctype=Appendix&subtype=B
-URIDate 2023-03-23

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- Definition

The amount of any gain recognised in a business combination in which the net of the identifiable assets acquired and the liabilities assumed exceeds the aggregate of the consideration transferred, non-controlling interest in the acquiree and fair value of the acquirer's previously held equity interest in the acquiree. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2023-01-01
-Paragraph B64
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- References

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X

- Definition

The amount of impairment loss recognised in profit or loss in non-consolidated companies.

+ References

No definition available.

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