v3.26.1
Shareholder Report, Line Graph (Details) 194685_Themes US Cash Flow Champions ETF_TF_TSR Annual {TF} - USD ($)
12 Months Ended
Sep. 30, 2024
Dec. 13, 2023
Sep. 30, 2025
Themes US Cash Flow Champions ETF      
Account Value [Line Items]      
Line Graph and Table Measure Name     Themes US Cash Flow Champions ETF
Accumulated Value $ 12,080 $ 10,000 $ 13,703
S&P 500 Index      
Account Value [Line Items]      
Line Graph and Table Measure Name     S&P 500 Index
Accumulated Value 12,549 10,000 $ 14,757
Solactive US Cash Flow Champions Index      
Account Value [Line Items]      
Line Graph and Table Measure Name     Solactive US Cash Flow Champions Index
Accumulated Value $ 12,114 $ 10,000 $ 13,798