The following table describes the fees and expenses you may pay if you buy, hold, and sell shares of the Fund (“Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. Because the Fund is newly organized, portfolio turnover information is not yet available.

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

Estimated for the current fiscal year.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then continue to hold or redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund is an actively managed ETF that seeks to achieve its investment objective by investing in equity securities of companies that U.S. Global Investors, Inc. (the “Adviser”), the Fund’s investment adviser, believes may benefit from the development of products and services or technological innovations related to national defense efforts, including aerospace, physical, and cybersecurity defense, in preparation for or in response to domestic, regional, or global conflicts.

Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes) in a combination of equity securities of technology companies and aerospace and defense companies. The foregoing policy may be changed upon 60 days’ written notice to shareholders.

The Fund considers an issuer to be a technology company if at least 50% of its gross income or its net sales come from activities in technology-related industries or at least 50% of its total assets are devoted to producing revenues in technology-related industries. The Fund expects to achieve the majority of its exposure to technology companies by investing in issuers in the semiconductor industry.

The Fund considers an issuer to be an aerospace and defense company if it derives at least 50% of its revenues or profits from, or devotes at least 50% of its assets in products, services, or technologies that are tied to the development of, or are otherwise instrumental in providing defense, security, and protection of sovereign states. These companies include firms that develop technologies and solutions that support national defense, cybersecurity, aerospace, boarder security, critical infrastructure, and public safety.

The Adviser selects individual companies to purchase or sell based primarily on internal research and quantitative and fundamental analyses that leverage insights from diverse sources, including internal and external research. The Fund may invest in companies of any market capitalization and may invest in equity securities issued by U.S. or foreign companies, including through American Depositary Receipts (“ADRs”). The foreign companies in which the Fund may invest include emerging markets.

The Fund concentrates its investments (that is, invests more than 25% of its net assets) in securities of companies in each of the aerospace & defense industry and the semiconductor industry. The Fund may have significant exposure to companies in the United States, Europe, Canada, Australia, and Turkey, though this may change from time to time.

The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. The Fund’s strategy may result in the active and frequent trading of the Fund’s investments, which may result in significant portfolio turnover.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

The Fund concentrates its investments (that is, invests more than 25% of its net assets) in securities of companies in each of the aerospace & defense industry and the semiconductor industry.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Performance information for the Fund is not included because the Fund did not have a full calendar year of performance prior to the date of this Prospectus. In the future, performance information for the Fund will be presented in this section. Updated performance information is available on the Fund’s website at https://usglobaletfs.com/fund/war/.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

Performance information for the Fund is not included because the Fund did not have a full calendar year of performance prior to the date of this Prospectus.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

https://usglobaletfs.com/fund/war/

U.S. Global Technology and Aerospace & Defense ETF | Risk Lose Money [Member]

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.

U.S. Global Technology and Aerospace & Defense ETF | Aerospace and Defense Companies Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Aerospace and Defense Companies Risk. The Fund will invest more than 25% of its net assets in companies in the aerospace & defense industry. Aerospace and defense companies are subject to numerous risks, including fierce competition, consolidation, adverse political, economic and governmental developments, substantial research and development costs, cuts in government funding, product and technology obsolescence, limited numbers of potential customers and decreased demand for new equipment. In addition, companies involved in the commercial aerospace industry are also subject to aircraft order cancellations, changes in aircraft-leasing contracts, excess capacity, cutbacks in profitable business travel, fuel price hikes, labor union settlements, adverse changes in international politics and relations, intense global competition, government regulation and cyclical market patterns. Aerospace and defense companies rely heavily on U.S. Government and other government demand for their products and services. As a result, these companies could be adversely impacted by future reductions or changes in government spending. Such government spending on aerospace and defense is not generally correlated with economic cycles, but rather with general political support for this type of spending. There is no assurance that future levels of spending on aerospace and defense will increase or that such spending will not decrease in the future. Competition, labor relations and the price of fuel can impact aerospace and defense companies. In addition, deregulation of airlines has substantially decreased the U.S. Government’s role in the air transport industry while promoting competition. However, the profitability of individual carriers as well as the entire industry could be impacted by the regulations and policies of various domestic and foreign governments.

U.S. Global Technology and Aerospace & Defense ETF | Cybersecurity Companies Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Cybersecurity Companies Risk. Companies in the cybersecurity field face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Cybersecurity companies may have limited product lines, markets, financial resources or personnel. The products of cybersecurity companies may face obsolescence due to rapid technological developments and frequent new product introduction, and such companies may face unpredictable changes in growth rates, competition for the services of qualified personnel and competition from foreign competitors with lower production costs. Companies in the cybersecurity field are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Additionally, companies in the cybersecurity field may be the target of cyber-attacks, which, if successful, could significantly or permanently damage a company’s reputation, financial condition and ability to conduct business in the future.

U.S. Global Technology and Aerospace & Defense ETF | Currency Exchange Rate Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Currency Exchange Rate Risk. The Fund’s assets may include investments denominated in non-U.S. currencies or in securities that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investment and the value of your Shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

U.S. Global Technology and Aerospace & Defense ETF | Depositary Receipt Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Depositary Receipt Risk. Depositary Receipts involve risks similar to those associated with investments in foreign securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Depositary Receipts listed on U.S. exchanges are issued by banks or trust companies and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in Depositary Receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the Depositary Receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

U.S. Global Technology and Aerospace & Defense ETF | Emerging Markets Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Emerging Markets Risk. The Fund may invest in companies organized in emerging market nations. Investments in securities and instruments traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, or regulatory conditions not associated with investments in U.S. securities and instruments or investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Shares and cause the Fund to decline in value. Less information may be available about companies in emerging markets than in developed markets because such emerging markets companies may not be subject to accounting, auditing and financial reporting standards or to other regulatory practices required by U.S. companies.

U.S. Global Technology and Aerospace & Defense ETF | Equity Market Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers. In addition, local, regional or global events such as war, including Russia’s invasion of Ukraine, acts of terrorism, spread of infectious diseases or other public health issues (such as the global pandemic caused by the COVID-19 virus), recessions, rising inflation, or other events could have a significant negative impact on the Fund and its investments. Such events may affect certain geographic regions, countries, sectors and industries more significantly than others. Such events could adversely affect the prices and liquidity of the Fund’s portfolio securities or other instruments and could result in disruptions in the trading markets.

U.S. Global Technology and Aerospace & Defense ETF | ETF Risks Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

•ETF Risks. The Fund is an ETF, and, as a result of an ETF’s structure, it is exposed to the following risks:

◦Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

◦Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

◦Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

◦Trading. Although Shares are listed for trading on NYSE Arca, Inc. (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. There can be no assurance that an active trading market for such Shares will develop or be maintained. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares, and this could lead to differences between the market price of the Shares and the underlying value of those Shares.

U.S. Global Technology and Aerospace & Defense ETF | ETF Risks, Authorized Participants, Market Makers And Liquidity Providers Concentration Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

U.S. Global Technology and Aerospace & Defense ETF | ETF Risks, Costs Of Buying Or Selling Shares Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

U.S. Global Technology and Aerospace & Defense ETF | ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

U.S. Global Technology and Aerospace & Defense ETF | ETF Risks, Trading Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Trading. Although Shares are listed for trading on NYSE Arca, Inc. (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. There can be no assurance that an active trading market for such Shares will develop or be maintained. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares, and this could lead to differences between the market price of the Shares and the underlying value of those Shares.

U.S. Global Technology and Aerospace & Defense ETF | Foreign Securities Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Foreign Securities Risk. Investments in non-U.S. securities involve certain risks that may not be present with investments in U.S. securities. For example, investments in non-U.S. securities may be subject to risk of loss due to foreign currency fluctuations or to political or economic instability. There may be less information publicly available about a non-U.S. issuer than a U.S. issuer. Investments in non-U.S. securities also may be subject to withholding or other taxes and may be subject to additional trading, settlement, custodial, and operational risks. These and other factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.

U.S. Global Technology and Aerospace & Defense ETF | Geographic Investment Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Geographic Investment Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies of a single country or region or lists and trades its shares on a foreign exchange, it is more likely to be impacted by events or conditions affecting that country or region.

◦Risks of Investing in Australia. Investment in Australian issuers may subject the Fund to regulatory, political, currency, security, and economic risk specific to Australia. The economy of Australia is heavily dependent on the price and the demand for commodities and natural resources as well as its exports from the energy, agricultural and mining sectors. As a result, the Australian economy is susceptible to fluctuations in the commodity markets. Conditions that weaken demand for Australian products worldwide could have a negative impact on the Australian economy as a whole. Australia also is increasingly dependent on the economies of its key trading partners, including China, the United States, and Japan.

◦Risks of Investing in Canada. The Fund may have significant exposure to companies in Canada, and, as a result, investment results could be dependent on the financial condition of the Canadian economy. The Canadian economy is reliant on the sale of natural resources and commodities, which can pose risks such as the fluctuation of prices and the variability of demand for exportation of such products. Changes in spending on Canadian products by the economies of other countries or changes in any of these economies may cause a significant impact on the Canadian economy.

◦Risks Related to Investing in Europe. The economies and markets of European countries are often closely connected and interdependent, and events in one country in Europe can have an adverse impact on other European countries. The Fund makes investments in securities of issuers that are domiciled in, or have significant operations in, member countries of the European Union (“EU”) that are subject to economic and monetary controls that can adversely affect the Fund’s investments. The European financial markets have experienced volatility and adverse trends in recent years and these events have adversely affected the exchange rate of the euro and may continue to significantly affect other European countries. Decreasing imports or exports, changes in governmental or EU regulations on trade, changes in the exchange rate of the euro, the default or threat of default by an EU member country on its sovereign debt, and/or an economic recession in an EU member country may have a significant adverse effect on the economies of EU member countries and their trading partners, including some or all of the European countries in which the Fund invests. Acts of war in Europe, including Russia’s large-scale military invasion of Ukraine, and the resulting sanctions by and against European nations could also have a severe adverse effect on both European and global economies, which in turn could affect the value of the Fund’s investments.

Risks of Investing in Turkey. There are legal, regulatory, political, currency, security and economic risks specific to Turkey. Among other things, the Turkish economy is heavily dependent on relationships with certain key trading partners, including European Union countries, China and Russia, and changes in the price or demand for Turkish exports may have an adverse impact on the Turkish economy. The Turkish economy has certain other significant economic weaknesses, such as its relatively high current account deficit, which may contribute to prolonged periods of recession or lower Turkey’s sovereign debt rating. Turkey has historically experienced acts of terrorism and strained relations related to border disputes and other geopolitical events with certain neighboring countries. Turkey may be subject to considerable social and political instability, in part due to the influence asserted by its military over the national government. Unanticipated or sudden political or social developments may cause uncertainty in the Turkish stock or currency market and, as a result, adversely affect the Fund’s investments.

U.S. Global Technology and Aerospace & Defense ETF | Geographic Investment Risk, Risks Of Investing In Australia Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Risks of Investing in Australia. Investment in Australian issuers may subject the Fund to regulatory, political, currency, security, and economic risk specific to Australia. The economy of Australia is heavily dependent on the price and the demand for commodities and natural resources as well as its exports from the energy, agricultural and mining sectors. As a result, the Australian economy is susceptible to fluctuations in the commodity markets. Conditions that weaken demand for Australian products worldwide could have a negative impact on the Australian economy as a whole. Australia also is increasingly dependent on the economies of its key trading partners, including China, the United States, and Japan.

U.S. Global Technology and Aerospace & Defense ETF | Geographic Investment Risk, Risks Of Investing In Canada Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Risks of Investing in Canada. The Fund may have significant exposure to companies in Canada, and, as a result, investment results could be dependent on the financial condition of the Canadian economy. The Canadian economy is reliant on the sale of natural resources and commodities, which can pose risks such as the fluctuation of prices and the variability of demand for exportation of such products. Changes in spending on Canadian products by the economies of other countries or changes in any of these economies may cause a significant impact on the Canadian economy.

U.S. Global Technology and Aerospace & Defense ETF | Geographic Investment Risk, Risks Of Investing In Europe Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Risks Related to Investing in Europe. The economies and markets of European countries are often closely connected and interdependent, and events in one country in Europe can have an adverse impact on other European countries. The Fund makes investments in securities of issuers that are domiciled in, or have significant operations in, member countries of the European Union (“EU”) that are subject to economic and monetary controls that can adversely affect the Fund’s investments. The European financial markets have experienced volatility and adverse trends in recent years and these events have adversely affected the exchange rate of the euro and may continue to significantly affect other European countries. Decreasing imports or exports, changes in governmental or EU regulations on trade, changes in the exchange rate of the euro, the default or threat of default by an EU member country on its sovereign debt, and/or an economic recession in an EU member country may have a significant adverse effect on the economies of EU member countries and their trading partners, including some or all of the European countries in which the Fund invests. Acts of war in Europe, including Russia’s large-scale military invasion of Ukraine, and the resulting sanctions by and against European nations could also have a severe adverse effect on both European and global economies, which in turn could affect the value of the Fund’s investments.

U.S. Global Technology and Aerospace & Defense ETF | Geographic Investment Risk, Risks Of Investing In Turkey Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

U.S. Global Technology and Aerospace & Defense ETF | Market Capitalization Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Market Capitalization Risk.

◦Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

◦Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large capitalization stocks or the stock market as a whole.

◦Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

U.S. Global Technology and Aerospace & Defense ETF | Market Capitalization Risk, Large-Capitalization Investing Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

U.S. Global Technology and Aerospace & Defense ETF | Market Capitalization Risk, Mid-Capitalization Investing Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large capitalization stocks or the stock market as a whole.

U.S. Global Technology and Aerospace & Defense ETF | Market Capitalization Risk, Small-Capitalization Investing Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

U.S. Global Technology and Aerospace & Defense ETF | Industry Concentration Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Industry Concentration Risk. Because the Fund’s assets will be concentrated in two industries, namely, the aerospace & defense industry and the semiconductor industry, the Fund is subject to loss due to adverse occurrences that may affect such industries as described in Aerospace and Defense Companies Risk and Semiconductor Company Risk.

U.S. Global Technology and Aerospace & Defense ETF | Management Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Management Risk. The Fund is actively managed and may not meet its investment objective based on the Adviser’s success or failure to implement investment strategies for the Fund.

U.S. Global Technology and Aerospace & Defense ETF | Risk Nondiversified Status [Member]

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Non-Diversification Risk. The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

U.S. Global Technology and Aerospace & Defense ETF | New Fund Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

New Fund Risk. The Fund is a recently organized investment company with no operating history. As a result, prospective investors have no track record or history on which to base their investment decision.

U.S. Global Technology and Aerospace & Defense ETF | Portfolio Turnover Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Portfolio Turnover Risk. The Fund may frequently buy and sell portfolio securities and other assets to rebalance the Fund’s exposure to specific securities. Higher portfolio turnover may result in the Fund paying higher levels of transaction costs and generating greater tax liabilities for shareholders. Portfolio turnover risk may cause the Fund’s performance to be less than you expect.

U.S. Global Technology and Aerospace & Defense ETF | Semiconductor Company Risk Member

Prospectus [Line Items]

rr_ProspectusLineItems

Risk [Text Block]

rr_RiskTextBlock

Semiconductor Company Risk. The Fund will invest more than 25% of its net assets in companies in the semiconductor industry. Competitive pressures may have a significant effect on the financial condition of semiconductor companies and, as product cycles shorten and manufacturing capacity increases, these companies may become increasingly subject to aggressive pricing, which hampers profitability. Reduced demand for end-user products, under-utilization of manufacturing capacity, and other factors could adversely impact the operating results of companies in the semiconductor sector. Semiconductor companies typically face high capital costs and may be heavily dependent on intellectual property rights. The semiconductor sector is highly cyclical, which may cause the operating results of many semiconductor companies to vary significantly. The stock prices of companies in the semiconductor sector have been and likely will continue to be extremely volatile.

U.S. Global Technology and Aerospace & Defense ETF | U.S. Global Technology and Aerospace & Defense ETF

Prospectus [Line Items]

rr_ProspectusLineItems

Trading Symbol

dei_TradingSymbol

WAR

Management Fees (as a percentage of Assets)

rr_ManagementFeesOverAssets

0.60%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none