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Document - Shareholder Report, Holdings (Details) 194684_Themes Cloud Computing ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040022 - Document - Shareholder Report, Line Graph (Details) 193538_Themes Copper Miners ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040023 - Document - Shareholder Report, Average Annual Return (Details) 193538_Themes Copper Miners ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040024 - Document - Shareholder Report, Holdings (Details) 193538_Themes Copper Miners ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040026 - Document - Shareholder Report, Line Graph (Details) 194690_Themes Cybersecurity ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040027 - Document - Shareholder Report, Average Annual Return (Details) 194690_Themes Cybersecurity ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040028 - Document - Shareholder Report, Holdings (Details) 194690_Themes Cybersecurity ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040030 - Document - Shareholder Report, Line Graph (Details) 194682_Themes Generative Artificial Intelligence ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040031 - Document - Shareholder Report, Average Annual Return (Details) 194682_Themes Generative Artificial Intelligence ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040032 - Document - Shareholder Report, Holdings (Details) 194682_Themes Generative Artificial Intelligence ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040034 - Document - Shareholder Report, Line Graph (Details) 194681_Themes Global Systemically Important Banks ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040035 - Document - Shareholder Report, Average Annual Return (Details) 194681_Themes Global Systemically Important Banks ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040036 - Document - Shareholder Report, Holdings (Details) 194681_Themes Global Systemically Important Banks ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040038 - Document - Shareholder Report, Line Graph (Details) 194691_Themes Gold Miners ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040039 - Document - Shareholder Report, Average Annual Return (Details) 194691_Themes Gold Miners ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040040 - Document - Shareholder Report, Holdings (Details) 194691_Themes Gold Miners ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040042 - Document - Shareholder Report, Line Graph (Details) 194693_Themes Robotics - Automation ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040043 - Document - Shareholder Report, Average Annual Return (Details) 194693_Themes Robotics - Automation ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040044 - 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Document - Shareholder Report, Holdings (Details) 194683_Themes Natural Monopoly ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040054 - Document - Shareholder Report, Line Graph (Details) 194695_Themes Silver Miners ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040055 - Document - Shareholder Report, Average Annual Return (Details) 194695_Themes Silver Miners ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040056 - Document - Shareholder Report, Holdings (Details) 194695_Themes Silver Miners ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040058 - Document - Shareholder Report, Line Graph (Details) 193137_Themes Transatlantic Defense ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040059 - Document - Shareholder Report, Average Annual Return (Details) 193137_Themes Transatlantic Defense ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040060 - Document - Shareholder Report, Holdings (Details) 193137_Themes Transatlantic Defense ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040062 - Document - Shareholder Report, Line Graph (Details) 193530_Themes Uranium - Nuclear ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040063 - Document - Shareholder Report, Average Annual Return (Details) 193530_Themes Uranium - Nuclear ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040064 - Document - Shareholder Report, Holdings (Details) 193530_Themes Uranium - Nuclear ETF_TF_TSR Annual {Elements}link:presentationLinklink:calculationLinklink:definitionLink040066 - Document - Shareholder Report, Line Graph (Details) 194685_Themes US Cash Flow Champions ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040067 - Document - Shareholder Report, Average Annual Return (Details) 194685_Themes US Cash Flow Champions ETF_TF_TSR Annual {TF}link:presentationLinklink:calculationLinklink:definitionLink040068 - 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