BetaBuilders MSCI US REIT ETF Investment Risks - BetaBuilders MSCI US REIT ETF	Feb. 28, 2026
Real Estate Securities Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Real Estate Securities Risk. The Fund’s investments in real estate securities, including REITs, are subject to the same risks as direct investments in real estate and mortgages, and their value will depend on the value of the underlying real estate interests. These risks include default, prepayments, changes in value resulting from changes in interest rates and demand for real and rental property, decreases in real estate values, overbuilding, increased competition and other risks related to local or general economic conditions, increases in operating costs and property taxes, changes in zoning laws, casualty or condemnation losses, possible environmental liabilities, regulatory limitations on rent, possible lack of availability of mortgage financing, market saturation, fluctuations in rental income and the value of underlying properties and extended vacancies of properties, and the management skill and creditworthiness of REIT issuers. In particular, the value of these securities may decline when interest rates rise and will also be affected by the real estate market and by the management of the underlying properties. REITs may be more volatile and/or more illiquid than other types of equity securities. The Fund will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests in addition to the expenses of the Fund. Publicly traded REIT shares are also subject to “Equity Market Risk.”
Equity Market Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Equity Market Risk. The price of equity securities may rise or fall because of changes in the broad market or changes in a company’s financial condition, sometimes rapidly or unpredictably. These price movements may result from factors affecting individual companies, sectors or industries selected for the Fund’s portfolio or the securities market as a whole, such as changes in economic or political conditions. When the value of the Fund’s securities goes down, your investment in the Fund decreases in value.
General Market Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Underlying Index or in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, trade wars, retaliatory trade measures, sanctions and other trade barriers, supply chain disruptions, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics or the threat or potential of one or more such factors and occurrences.
Index Related Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Index Related Risk. The Fund’s return may not track the return of the Underlying Index for a number of reasons and therefore may not achieve its investment objective. For example, the Fund incurs a number of operating expenses not applicable to the Underlying Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Underlying Index. In addition, the Fund’s return may differ from the return of the Underlying Index as a result of, among other things, pricing differences and the inability to purchase certain securities included in the Underlying Index due to regulatory or other restrictions. In addition, when the Fund uses a representative sampling approach, the Fund may not be as well correlated with the return of the Underlying Index as when the Fund purchases all of the securities in the Underlying Index in the proportions in which they are represented in the Underlying Index. Errors in the construction or calculation of the Underlying Index may occur from time to time. Any such errors may not be identified and corrected by the Index Provider for some period of time, which may have an adverse impact on the Fund and its shareholders. The risk that the Fund may not track the performance of the Underlying Index may be heightened during times of increased market volatility or other unusual market conditions.
Passive Management Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Passive Management Risk. Unlike many investment companies, the Fund is not “actively” managed. Therefore, it would not generally sell a security because the security’s issuer was in financial trouble unless that security is removed from the Underlying Index. As a result, the Fund’s performance could be lower than funds that actively shift their portfolio assets to take advantage of market opportunities or lessen the impact of a market decline or a decline in the value of one or more issuers. The structure and composition of the Underlying Index will affect the performance, volatility, and risk of the Fund. The Fund will not take defensive positions under any market conditions, including in declining markets.
Sampling Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Sampling Risk. Because the Fund uses a representative sampling approach, it will hold a smaller number of securities than are in the Underlying Index. As a result, an adverse development respecting an issuer of securities held by the Fund could result in a greater decline in the Fund’s NAV than would be the case if the Fund held all of the securities in the Underlying Index. Conversely, a positive development relating to an issuer of securities in the Underlying Index that is not held by the Fund could cause the Fund to underperform the Underlying Index. To the extent the assets in the Fund are smaller, these risks may be greater.
Derivatives Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Derivatives Risk. Derivatives, including futures contracts, may be riskier than other types of investments and may increase the volatility of the Fund. Derivatives may be sensitive to changes in economic and market conditions and may create leverage, which could result in losses that significantly exceed the Fund’s original investment. Certain derivatives expose the Fund to counterparty risk, which is the risk that the derivative counterparty will not fulfill its contractual obligations (and includes credit risk associated with the counterparty). Certain derivatives are synthetic instruments that attempt to replicate the performance of certain reference assets. With regard to such derivatives, the Fund does not have a claim on the reference assets and is subject to enhanced counterparty risk. Derivatives may not perform as expected, so the Fund may not realize the intended benefits. In addition, given their complexity, derivatives expose the Fund to risks of mispricing or improper valuation. Derivatives also can expose the Fund to derivative liquidity risk, which includes risks involving the liquidity demands that derivatives can create to make payments of margin, collateral, or settlement payments to counterparties, legal risk, which includes the risk of loss resulting from insufficient or unenforceable contractual documentation, insufficient capacity or authority of the Fund’s counterparty and operational risk, which includes documentation or settlement issues, system failures, inadequate controls and human error. Certain of the Fund’s transactions in foreign currency derivatives and other derivatives could also affect the amount, timing and character of distributions to shareholders which may result in the Fund realizing more ordinary income and short-term capital gain subject to tax at ordinary income tax rates than it would if it did not engage in such transactions, which may adversely impact the Fund’s after-tax returns.
Smaller Company Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Smaller Company Risk. Investments in securities of smaller companies (mid cap and small cap companies) may be riskier, less liquid, more volatile and more vulnerable to economic, market and industry changes than securities of larger, more established companies. The securities of smaller companies may trade less frequently and in smaller volumes than securities of larger companies. As a result, changes in the price of securities issued by such companies may be more sudden or erratic than the prices of securities of larger companies, especially over the short term. These risks are higher for small cap companies.
ETF Shares Trading Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	ETF Shares Trading Risk. Shares are listed for trading on the Cboe BZX Exchange, Inc. (the Exchange) and are bought and sold in the secondary market at market prices. The market prices of Shares are expected to fluctuate, in some cases materially, in response to changes in the Fund’s NAV, the intraday value of the Fund’s holdings and supply and demand for Shares. The adviser cannot predict whether Shares will trade above, below or at their NAV. Disruptions to creations and redemptions, the existence of significant market volatility or potential lack of an active trading market for the Shares (including through a trading halt), as well as other factors, may result in the Shares trading significantly above (at a premium) or below (at a discount) to NAV or to the intraday value of the Fund’s holdings. During such periods, you may incur significant losses if you sell your Shares.
Authorized Participant Concentration Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants and none of these authorized participants is or will be obligated to engage in creation or redemption transactions. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund and no other authorized participant creates or redeems, Shares may trade at a discount to NAV and possibly face trading halts and/or delisting. Authorized participant concentration risk may be heightened for exchange-traded funds (ETFs) that invest in securities issued by non-U.S. issuers.
Concentration Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Concentration Risk. To the extent that the securities in the Underlying Index are concentrated in one or more industries or groups of industries, the Fund may concentrate in such industries or groups of industries. The current Underlying Index is concentrated in the real estate group of industries. This concentration increases the risk of loss to the Fund by increasing its exposure to economic, business, political or regulatory developments that may be adverse to the real estate group of industries.
Tax Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Tax Risk. REITs in which the Fund will invest are subject to complicated Internal Revenue Code rules. The tax laws that apply to these investment vehicles have the potential to create negative tax consequences for the Fund, or for certain shareholders of the Fund, including, in particular, charitable remainder trusts and non-U.S. taxpayers. The Fund is subject to the risk that the issuer of the securities will fail to comply with certain requirements of the Internal Revenue Code, which could cause adverse tax consequences. The Fund may distribute amounts to shareholders in excess of its earnings, resulting in a return of capital. Such distributions are not currently taxable to shareholders; instead, any such distributions would reduce a shareholder’s tax basis in its Shares, resulting in an increased gain, or decreased loss, on a later redemption or other taxable disposition of such Shares. Should any such distributions exceed a shareholder’s tax basis in its Shares, such excess would be treated as gain and taxable to the shareholder in the same manner as gain from a sale of Fund Shares.
Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	You could lose money investing in the Fund.
Risk Not Insured Depository Institution [Member]
Prospectus [Line Items]
Risk [Text Block]	Investments in the Fund are not deposits or obligations of, or guaranteed or endorsed by, any bank and are not insured or guaranteed by the FDIC, the Federal Reserve Board or any other government agency.

BetaBuilders MSCI US REIT ETF Investment Risks - BetaBuilders MSCI US REIT ETF

Feb. 28, 2026

Real Estate Securities Risk. The Fund’s investments in real estate securities, including REITs, are subject to the same risks as direct investments in real estate and mortgages, and their value will depend on the value of the underlying real estate interests. These risks include default, prepayments, changes in value resulting from changes in interest rates and demand for real and rental property, decreases in real estate values, overbuilding, increased competition and other risks related to local or general economic conditions, increases in operating costs and property taxes, changes in zoning laws, casualty or condemnation losses, possible environmental liabilities, regulatory limitations on rent, possible lack of availability of mortgage financing, market saturation, fluctuations in rental income and the value of underlying properties and extended vacancies of properties, and the management skill and creditworthiness of REIT issuers. In particular, the value of these securities may decline when interest rates rise and will also be affected by the real estate market and by the management of the underlying properties. REITs may be more volatile and/or more illiquid than other types of equity securities. The Fund will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests in addition to the expenses of the Fund. Publicly traded REIT shares are also subject to “Equity Market Risk.”

Prospectus [Line Items]

Risk [Text Block]

Equity Market Risk. The price of equity securities may rise or fall because of changes in the broad market or changes in a company’s financial condition, sometimes rapidly or unpredictably. These price movements may result from factors affecting individual companies, sectors or industries selected for the Fund’s portfolio or the securities market as a whole, such as changes in economic or political conditions. When the value of the Fund’s securities goes down, your investment in the Fund decreases in value.

General Market Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Underlying Index or in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, trade wars, retaliatory trade measures, sanctions and other trade barriers, supply chain disruptions, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics or the threat or potential of one or more such factors and occurrences.

Index Related Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Index Related Risk. The Fund’s return may not track the return of the Underlying Index for a number of reasons and therefore may not achieve its investment objective. For example, the Fund incurs a number of operating expenses not applicable to the Underlying Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Underlying Index. In addition, the Fund’s return may differ from the return of the Underlying Index as a result of, among other things, pricing differences and the inability to purchase certain securities included in the Underlying Index due to regulatory or other restrictions. In addition, when the Fund uses a representative sampling approach, the Fund may not be as well correlated with the return of the Underlying Index as when the Fund purchases all of the securities in the Underlying Index in the proportions in which they are represented in the Underlying Index. Errors in the construction or calculation of the Underlying Index may occur from time to time. Any such errors may not be identified and corrected by the Index Provider for some period of time, which may have an adverse impact on the Fund and its shareholders. The risk that the Fund may not track the performance of the Underlying Index may be heightened during times of increased market volatility or other unusual market conditions.

Passive Management Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Passive Management Risk. Unlike many investment companies, the Fund is not “actively” managed. Therefore, it would not generally sell a security because the security’s issuer was in financial trouble unless that security is removed from the Underlying Index. As a result, the Fund’s performance could be lower than funds that actively shift their portfolio assets to take advantage of market opportunities or lessen the impact of a market decline or a decline in the value of one or more issuers. The structure and composition of the Underlying Index will affect the performance, volatility, and risk of the Fund. The Fund will not take defensive positions under any market conditions, including in declining markets.

Sampling Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Sampling Risk. Because the Fund uses a representative sampling approach, it will hold a smaller number of securities than are in the Underlying Index. As a result, an adverse development respecting an issuer of securities held by the Fund could result in a greater decline in the Fund’s NAV than would be the case if the Fund held all of the securities in the Underlying Index. Conversely, a positive development relating to an issuer of securities in the Underlying Index that is not held by the Fund could cause the Fund to underperform the Underlying Index. To the extent the assets in the Fund are smaller, these risks may be greater.

Derivatives Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Derivatives Risk. Derivatives, including futures contracts, may be riskier than other types of investments and may increase the volatility of the Fund. Derivatives may be sensitive to changes in economic and market conditions and may create leverage, which could result in losses that significantly exceed the Fund’s original investment. Certain derivatives expose the Fund to counterparty risk, which is the risk that the derivative counterparty will not fulfill its contractual obligations (and includes credit risk associated with the counterparty). Certain derivatives are synthetic instruments that attempt to replicate the performance of certain reference assets. With regard to such derivatives, the Fund does not have a claim on the reference assets and is subject to enhanced counterparty risk. Derivatives may not perform as expected, so the Fund may not realize the intended benefits. In addition, given their complexity, derivatives expose the Fund to risks of mispricing or improper valuation. Derivatives also can expose the Fund to derivative liquidity risk, which includes risks involving the liquidity demands that derivatives can create to make payments of margin, collateral, or settlement payments to counterparties, legal risk, which includes the risk of loss resulting from insufficient or unenforceable contractual documentation, insufficient capacity or authority of the Fund’s counterparty and operational risk, which includes documentation or settlement issues, system failures, inadequate controls and human error. Certain of the Fund’s transactions in foreign currency derivatives and other derivatives could also affect the amount, timing and character of distributions to shareholders which may result in the Fund realizing more ordinary income and short-term capital gain subject to tax at ordinary income tax rates than it would if it did not engage in such transactions, which may adversely impact the Fund’s after-tax returns.

Smaller Company Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Smaller Company Risk. Investments in securities of smaller companies (mid cap and small cap companies) may be riskier, less liquid, more volatile and more vulnerable to economic, market and industry changes than securities of larger, more established companies. The securities of smaller companies may trade less frequently and in smaller volumes than securities of larger companies. As a result, changes in the price of securities issued by such companies may be more sudden or erratic than the prices of securities of larger companies, especially over the short term. These risks are higher for small cap companies.

ETF Shares Trading Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

ETF Shares Trading Risk. Shares are listed for trading on the Cboe BZX Exchange, Inc. (the Exchange) and are bought and sold in the secondary market at market prices. The market prices of Shares are expected to fluctuate, in some cases materially, in response to changes in the Fund’s NAV, the intraday value of the Fund’s holdings and supply and demand for Shares. The adviser cannot predict whether Shares will trade above, below or at their NAV. Disruptions to creations and redemptions, the existence of significant market volatility or potential lack of an active trading market for the Shares (including through a trading halt), as well as other factors, may result in the Shares trading significantly above (at a premium) or below (at a discount) to NAV or to the intraday value of the Fund’s holdings. During such periods, you may incur significant losses if you sell your Shares.

Authorized Participant Concentration Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants and none of these authorized participants is or will be obligated to engage in creation or redemption transactions. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund and no other authorized participant creates or redeems, Shares may trade at a discount to NAV and possibly face trading halts and/or delisting. Authorized participant concentration risk may be heightened for exchange-traded funds (ETFs) that invest in securities issued by non-U.S. issuers.

Concentration Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Concentration Risk. To the extent that the securities in the Underlying Index are concentrated in one or more industries or groups of industries, the Fund may concentrate in such industries or groups of industries. The current Underlying Index is concentrated in the real estate group of industries. This concentration increases the risk of loss to the Fund by increasing its exposure to economic, business, political or regulatory developments that may be adverse to the real estate group of industries.

Tax Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Tax Risk. REITs in which the Fund will invest are subject to complicated Internal Revenue Code rules. The tax laws that apply to these investment vehicles have the potential to create negative tax consequences for the Fund, or for certain shareholders of the Fund, including, in particular, charitable remainder trusts and non-U.S. taxpayers. The Fund is subject to the risk that the issuer of the securities will fail to comply with certain requirements of the Internal Revenue Code, which could cause adverse tax consequences. The Fund may distribute amounts to shareholders in excess of its earnings, resulting in a return of capital. Such distributions are not currently taxable to shareholders; instead, any such distributions would reduce a shareholder’s tax basis in its Shares, resulting in an increased gain, or decreased loss, on a later redemption or other taxable disposition of such Shares. Should any such distributions exceed a shareholder’s tax basis in its Shares, such excess would be treated as gain and taxable to the shareholder in the same manner as gain from a sale of Fund Shares.

Risk Lose Money [Member]

Prospectus [Line Items]

Risk [Text Block]

You could lose money investing in the Fund.

Risk Not Insured Depository Institution [Member]

Prospectus [Line Items]

Risk [Text Block]

Investments in the Fund are not deposits or obligations of, or guaranteed or endorsed by, any bank and are not insured or guaranteed by the FDIC, the Federal Reserve Board or any other government agency.