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Note 1 - Segment information (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 10.00% | 10.00% | 10.00%
Non-current assets attributable to the Company’s country of incorporation | $ 10,999,431 | $ 11,213,945 |
Revenues from services performed | 11,981,157 | 12,523,934 | $ 14,868,860
Contract liabilities | 168,800 | 206,200 |
Contract assets | 35,300 | 50,800 |
Tubes [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from services performed | 11,400,000 | 11,907,000 | 14,185,000
Services to third parties [member] | Tubes [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from services performed | $ 426,600 | $ 483,500 | $ 164,800
Tenaris [member] | Government customers [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 25.00% | 30.00% | 26.00%
LUXEMBOURG |  |  |
Disclosure of operating segments [line items] |  |  |
Non-current assets attributable to the Company’s country of incorporation | $ 16,700 | $ 15,600 | $ 10,700
USA |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 35.00% |  |
Argentina |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 11.00% |  |
Canada | Less than 10 Percent [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 10.00% |  |
Saudi Arabia | Less than 10 Percent [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 10.00% |  |
UNITED ARAB EMIRATES | Less than 10 Percent [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 10.00% |  |
Mexico | Less than 10 Percent [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 10.00% |  |
Brazil | Less than 10 Percent [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Percentage of entity's revenue | 10.00% |  |

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