v3.26.1
Shareholder Report, Line Graph (Details) 194691_Themes Gold Miners ETF_TF_TSR Annual {TF} - USD ($)
12 Months Ended
Sep. 30, 2024
Dec. 13, 2023
Sep. 30, 2025
Themes Gold Miners ETF      
Account Value [Line Items]      
Line Graph and Table Measure Name     Themes Gold Miners ETF
Accumulated Value $ 15,048 $ 10,000 $ 32,399
MSCI ACWI Index      
Account Value [Line Items]      
Line Graph and Table Measure Name     MSCI ACWI Index
Accumulated Value 12,288 10,000 $ 14,409
Solactive Global Pure Gold Miners Index      
Account Value [Line Items]      
Line Graph and Table Measure Name     Solactive Global Pure Gold Miners Index
Accumulated Value $ 15,141 $ 10,000 $ 32,717