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Significant accounting policies (Details) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jul. 31, 2022
Jun. 17, 2021
Significant accounting policies          
Standard Corporation Tax Rate 12.50%        
Higher Corporation Tax Rate 25.00%        
Vessels Scrap Value Per Lightweight Ton $ 400        
Deferred Income Tax Expense (Benefit) 0 $ 0 $ 0    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 0 0 $ 0    
Equity Method Investment, Aggregate Cost 4,500,000        
Common Stock, Value, Issued $ 440,000 $ 433,000      
Lessor, Operating Lease, Term of Contract       24 months  
Vessels [Member]          
Significant accounting policies          
Property, Plant and Equipment, Useful Life 25 years        
Office Equipment and Fixtures and Fittings [Member]          
Significant accounting policies          
Property, Plant and Equipment, Useful Life 5 years        
Minimum [Member]          
Significant accounting policies          
Scheduled drydocking period of vessels 30 months        
Maximum [Member]          
Significant accounting policies          
Scheduled drydocking period of vessels 60 months        
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%        
Element 1 Corp.          
Significant accounting policies          
Equity Method Investment, Ownership Percentage 10.00%       10.00%
Equity Method Investment, Aggregate Cost $ 9,300,000       $ 9,300,000
Common Stock, Value, Issued 4,500,000       $ 5,300,000
Impariment $ 4,400,000