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Significant accounting policies - Basis of preparation (Details) | Dec. 31, 2024 | Jun. 17, 2021
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Ardmore Shipping Corporation |  |
Significant accounting policies |  |
Equity Method Investment, Ownership Percentage | 100.00% |
Anglo Ardmore Ship Management Limited |  |
Significant accounting policies |  |
Equity Method Investment, Ownership Percentage | 50.00% |
Anglo Ardmore Ship Management Limited | Corporate Joint Venture [Member] |  |
Significant accounting policies |  |
Equity Method Investment, Ownership Percentage | 50.00% |
e1 Marine LLC | Corporate Joint Venture [Member] |  |
Significant accounting policies |  |
Equity Method Investment, Ownership Percentage |  | 33.33%
Element 1 Corp. |  |
Significant accounting policies |  |
Equity Method Investment, Ownership Percentage | 10.00% | 10.00%

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- 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 + Details
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