v3.26.1
Shareholder Report, Line Graph (Details) 194684_Themes Cloud Computing ETF_TF_TSR Annual {TF} - USD ($)
12 Months Ended
Sep. 30, 2024
Dec. 15, 2023
Sep. 30, 2025
Themes Cloud Computing ETF      
Account Value [Line Items]      
Line Graph and Table Measure Name     Themes Cloud Computing ETF
Accumulated Value $ 11,221 $ 10,000 $ 14,290
MSCI ACWI Index      
Account Value [Line Items]      
Line Graph and Table Measure Name     MSCI ACWI Index
Accumulated Value 12,049 10,000 $ 14,129
Solactive Cloud Computing Index      
Account Value [Line Items]      
Line Graph and Table Measure Name     Solactive Cloud Computing Index
Accumulated Value $ 11,253 $ 10,000 $ 14,388