v3.26.1
Shareholder Report, Line Graph (Details) 193538_Themes Copper Miners ETF_TF_TSR Annual {TF} - USD ($)
12 Months Ended
Sep. 24, 2024
Sep. 30, 2025
Themes Copper Miners ETF    
Account Value [Line Items]    
Line Graph and Table Measure Name   Themes Copper Miners ETF
Accumulated Value $ 10,000 $ 15,034
MSCI ACWI Index    
Account Value [Line Items]    
Line Graph and Table Measure Name   MSCI ACWI Index
Accumulated Value 10,000 $ 11,898
BITA Global Copper Mining Select Index    
Account Value [Line Items]    
Line Graph and Table Measure Name   BITA Global Copper Mining Select Index
Accumulated Value $ 10,000 $ 14,718