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Gain / (loss) on sale of vessels - Additional information (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
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Apr. 30, 2024 | Feb. 29, 2024 | Jun. 30, 2022 | Dec. 31, 2024 | Dec. 31, 2022
Lessee, Lease, Description [Line Items] |  |  |  |  |
Gain / (loss) on vessels sold |  |  |  | $ 12,322 | $ (6,917)
Ardmore Seafarer |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Vessel sales price |  | $ 27,100 |  |  |
Gain / (loss) on vessels sold | $ 12,300 |  |  | $ 12,322 |
Ardmore Sealancer [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Gain / (loss) on vessels sold |  |  |  |  | $ (728)
Ardmore Sealeader & Ardmore Sealifter |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Vessel sales price |  |  | $ 40,700 |  |
Gain / (loss) on vessels sold |  |  | $ (6,900) |  |

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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- Definition Amount of cash inflow for the sale of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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