v3.26.1
Shareholder Report, Average Annual Return (Details) 193134_Themes US Infrastructure ETF_TF_TSR Annual {TF}
12 Months Ended 13 Months Ended
Sep. 30, 2025
Sep. 30, 2025
Themes US Infrastructure ETF    
Average Annual Return [Line Items]    
Line Graph and Table Measure Name Themes US Infrastructure ETF  
Average Annual Return, Percent 13.54% 21.73%
S&P 500 Index    
Average Annual Return [Line Items]    
Line Graph and Table Measure Name S&P 500 Index  
Average Annual Return, Percent 17.60% 20.89%
Solactive United States Infrastructure Index    
Average Annual Return [Line Items]    
Line Graph and Table Measure Name Solactive United States Infrastructure Index  
Average Annual Return, Percent 13.60% 21.80%