Investment Risks	Jun. 30, 2026
U.S. Diversified Real Estate ETF \| Concentration Risk Member
Prospectus [Line Items]
Risk [Text Block]	Concentration Risk. The Fund’s investments will be concentrated in an industry or group of industries to the extent that the Index is so concentrated, and the Index is expected to be concentrated in real estate-related industries. Accordingly, the value of Shares may rise and fall more than the value of shares of a fund that invests in securities of companies in a broader range of industries. In addition, at times, real estate-related industries may be out of favor and underperform other industries or groups of industries or the market as a whole.
U.S. Diversified Real Estate ETF \| Equity Market Risk Member
Prospectus [Line Items]
Risk [Text Block]	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, regional armed conflict, acts of terrorism, market volatility related to global trade policy and the imposition of tariffs, the 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. Diversified Real Estate ETF \| ETF Risks Member
Prospectus [Line Items]
Risk [Text Block]	•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. ◦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. 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. Diversified Real Estate ETF \| ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member
Prospectus [Line Items]
Risk [Text Block]	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. Diversified Real Estate ETF \| ETF Risks, Costs Of Buying Or Selling Shares Risk Member
Prospectus [Line Items]
Risk [Text Block]	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. Diversified Real Estate ETF \| ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member
Prospectus [Line Items]
Risk [Text Block]	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.
U.S. Diversified Real Estate ETF \| ETF Risks, Trading Risk Member
Prospectus [Line Items]
Risk [Text Block]	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. 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. Diversified Real Estate ETF \| Models And Data Risk Member
Prospectus [Line Items]
Risk [Text Block]	Models and Data Risk. The composition of the Index is heavily dependent on a proprietary quantitative model as well as information and data supplied by third parties (“Models and Data”). When Models and Data prove to be incorrect or incomplete, any decisions made in reliance thereon may lead to the inclusion or exclusion of securities from the Index that would have been excluded or included had the Models and Data been correct and complete. If the composition of the Index reflects such errors, the Fund’s portfolio can be expected to reflect the errors, too.
U.S. Diversified Real Estate ETF \| Passive Investment Risk Member
Prospectus [Line Items]
Risk [Text Block]	Passive Investment Risk. The Fund is not actively managed, and its adviser would not sell shares of an equity security due to current or projected underperformance of a security, industry, or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution or rebalancing of the Index in accordance with the Index methodology.
U.S. Diversified Real Estate ETF \| Real Estate Investment Risk Member
Prospectus [Line Items]
Risk [Text Block]	Real Estate Investment Risk. Investments in real estate companies involve unique risks. Real estate companies, including REITs and real estate operating companies, may have limited financial resources, may trade less frequently and in limited volume, and may be more volatile than other securities. Investing in real estate companies entails certain risks associated with the direct ownership of real estate, such as a decrease in value of real estate, as well as the real estate industry in general. Many factors may affect real estate values, including general, regional and local economic conditions, fluctuations in interest rates and property tax rates, the amount of new construction in a particular area, laws and regulations affecting real estate (including zoning and tax laws, environmental regulations, and other governmental action, such as the exercise of eminent domain), and the costs of owning, maintaining and improving real estate. The availability of mortgages may also affect real estate values. Real estate companies are also subject to heavy cash flow dependency, increased operating expenses, the skill of management, changes in property values and rental rates, overbuilding, losses due to natural disasters, casualty or condemnation, defaults by borrowers, and self-liquidation. In addition to these risks, property-owning REITs may be affected by changes in the value of the underlying property owned by the trusts, while mortgage-based REITs may be affected by the quality of any credit extended. REITs are also subject to heavy cash flow dependency, defaults by borrowers and self-liquidation. In addition, U.S. REITs could possibly fail to qualify for the beneficial tax treatment available to REITs under the Internal Revenue Code of 1986, as amended (the “Code”), or to maintain their exemptions from registration under the Investment Company Act of 1940, as amended (the “1940 Act”). The Fund expects that dividends received from a REIT and distributed to Fund shareholders generally will be taxable to the shareholder as ordinary income. The above factors may also adversely affect a borrower’s or a lessee’s ability to meet its obligations to the REIT. In the event of a default by a borrower or lessee, the REIT may experience delays in enforcing its rights as a mortgagee or lessor and may incur substantial costs associated with protecting investments. In addition, the Fund holds interests in REITs, and it is expected that investors in the Fund will bear two layers of asset-based management fees and expenses (directly at the Fund level and indirectly at the REIT level).
U.S. Diversified Real Estate ETF \| Smaller Companies Risk Member
Prospectus [Line Items]
Risk [Text Block]	Smaller Companies Risk. The equity securities of smaller companies have historically been subject to greater investment risk than securities of larger companies. The prices of equity securities of smaller companies tend to be more volatile and less liquid than the prices of equity securities of larger companies.
U.S. Diversified Real Estate ETF \| Tracking Error Risk Member
Prospectus [Line Items]
Risk [Text Block]	•Tracking Error Risk. As with all index funds, the performance of the Fund and the Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.
U.S. Diversified Real Estate ETF \| Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
The Frontier Economic Fund \| Equity Market Risk Member
Prospectus [Line Items]
Risk [Text Block]	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, regional armed conflict, acts of terrorism, market volatility related to global trade policy and the imposition of tariffs, the 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.
The Frontier Economic Fund \| ETF Risks Member
Prospectus [Line Items]
Risk [Text Block]	•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. ◦Trading. Although Shares are listed for trading on the New York Stock Exchange (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.
The Frontier Economic Fund \| ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member
Prospectus [Line Items]
Risk [Text Block]	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.
The Frontier Economic Fund \| ETF Risks, Costs Of Buying Or Selling Shares Risk Member
Prospectus [Line Items]
Risk [Text Block]	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.
The Frontier Economic Fund \| ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member
Prospectus [Line Items]
Risk [Text Block]	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.
The Frontier Economic Fund \| ETF Risks, Trading Risk Member
Prospectus [Line Items]
Risk [Text Block]	Trading. Although Shares are listed for trading on the New York Stock Exchange (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.
The Frontier Economic Fund \| Passive Investment Risk Member
Prospectus [Line Items]
Risk [Text Block]	Passive Investment Risk. The Fund invests in the securities included in, or representative of, the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index.
The Frontier Economic Fund \| Tracking Error Risk Member
Prospectus [Line Items]
Risk [Text Block]	Tracking Error Risk. As with all index funds, the performance of the Fund and the Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.
The Frontier Economic Fund \| ADR Risk Member
Prospectus [Line Items]
Risk [Text Block]	ADR Risk. ADRs 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. ADRs listed on U.S. exchanges are issued by banks or trust companies, and ADRs entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares.
The Frontier Economic Fund \| Foreign Securities Risk Member
Prospectus [Line Items]
Risk [Text Block]	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.
The Frontier Economic Fund \| Geographic Investment Risk Member
Prospectus [Line Items]
Risk [Text Block]	Geographic Investment Risk. The Fund invests primarily in the securities of Alaska Companies. As a result, the Fund is more likely to be impacted by events or conditions affecting Alaska. For example, political and economic conditions and changes in regulatory, tax, or economic policy in Alaska could significantly affect Alaska Companies, result in significant market volatility, and have a negative impact on the Fund’s performance. In particular, the economic success of Alaska Companies may depend upon their access to natural resources and commodities located in Alaska, which may be barred or limited by the local, state, or federal government. In addition, Alaska’s environment and local economy is subject to significant risks related to the impact of climate change, such as sea level rise, thawing permafrost, coastal erosion, as well as natural disasters such as earthquakes, wildfire, and tsunamis.
The Frontier Economic Fund \| Market Capitalization Risk Member
Prospectus [Line Items]
Risk [Text Block]	Market Capitalization Risk. ◦Large-Capitalization Investing Risk. The Fund may invest in the securities of large-capitalization companies. 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 Risk. The Fund may invest in the securities of mid-capitalization companies. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies, but they may also be subject to slower growth than small-capitalization companies during times of economic expansion. 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. Mid-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs, and earnings. ◦Small-Capitalization Investing Risk. The Fund may invest in the securities of small-capitalization companies. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of larger-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies also may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.
The Frontier Economic Fund \| Market Capitalization Risk, Large-Capitalization Investing Risk Member
Prospectus [Line Items]
Risk [Text Block]	Large-Capitalization Investing Risk. The Fund may invest in the securities of large-capitalization companies. 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.
The Frontier Economic Fund \| Market Capitalization Risk, Mid-Capitalization Investing Risk Member
Prospectus [Line Items]
Risk [Text Block]	Mid-Capitalization Investing Risk. The Fund may invest in the securities of mid-capitalization companies. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies, but they may also be subject to slower growth than small-capitalization companies during times of economic expansion. 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. Mid-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs, and earnings.
The Frontier Economic Fund \| Market Capitalization Risk, Small-Capitalization Investing Risk Member
Prospectus [Line Items]
Risk [Text Block]	Small-Capitalization Investing Risk. The Fund may invest in the securities of small-capitalization companies. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of larger-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies also may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.
The Frontier Economic Fund \| MLP Risk Member
Prospectus [Line Items]
Risk [Text Block]	MLP Risk. MLP investment returns are enhanced during periods of declining or low interest rates and tend to be negatively influenced when interest rates are rising. In addition, most MLPs are fairly leveraged and typically carry a portion of a “floating” rate debt. As such, a significant upward swing in interest rates would also drive interest expense higher. Furthermore, most MLPs grow by acquisitions partly financed by debt, and higher interest rates could make it more difficult to make acquisitions. MLP investments also entail many of the general tax risks of investing in a partnership. Limited partners in an MLP typically have limited control and limited rights to vote on matters affecting the partnership. Additionally, there is always the risk that an MLP will fail to qualify for favorable tax treatment.
The Frontier Economic Fund \| New Fund Risk Member
Prospectus [Line Items]
Risk [Text Block]	New Fund Risk. The Fund is a recently organized investment company with limited operating history. As a result, prospective investors have limited track record or history on which to base their investment decision.
The Frontier Economic Fund \| Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	•Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund may invest a significant portion of its assets in the following sectors and, therefore, the performance of the Fund could be negatively impacted by events affecting each of these sectors. ◦Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and such companies may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability. ◦Energy Sector Risk. The energy sector is comprised of energy, industrial, infrastructure, and logistics companies, and will therefore be susceptible to adverse economic, environmental, business, regulatory, or other occurrences affecting that sector. The energy sector has historically experienced substantial price volatility. At times, the performance of these investments may lag the performance of other sectors or the market as a whole. Companies operating in the energy sector are subject to specific risks, including, among others, fluctuations in commodity prices; reduced consumer demand for commodities such as oil, natural gas, or petroleum products; reduced availability of natural gas or other commodities for transporting, processing, storing, or delivering; slowdowns in new construction; extreme weather or other natural disasters; and threats of attack by terrorists on energy assets. Additionally, energy sector companies are subject to substantial government regulation and changes in the regulatory environment for energy companies may adversely impact their profitability. Over time, depletion of natural gas reserves and other energy reserves may also affect the profitability of energy companies. ◦Industrials Sector Risk. The industrials sector can be significantly affected by, among other things, worldwide economic growth, supply and demand for specific products and services, rapid technological developments, international political and economic developments, environmental issues, tariffs and trade barriers, and tax and governmental regulatory policies. As the demand for, or prices of, industrials increase, the value of the Fund’s investments generally would be expected to also increase. Conversely, declines in the demand for, or prices of, industrials generally would be expected to contribute to declines in the value of such securities. Such declines may occur quickly and without warning and may negatively impact the value of the Fund and your investment.
The Frontier Economic Fund \| Sector Risk, Consumer Discretionary Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and such companies may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability.
The Frontier Economic Fund \| Sector Risk, Energy Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	Energy Sector Risk. The energy sector is comprised of energy, industrial, infrastructure, and logistics companies, and will therefore be susceptible to adverse economic, environmental, business, regulatory, or other occurrences affecting that sector. The energy sector has historically experienced substantial price volatility. At times, the performance of these investments may lag the performance of other sectors or the market as a whole. Companies operating in the energy sector are subject to specific risks, including, among others, fluctuations in commodity prices; reduced consumer demand for commodities such as oil, natural gas, or petroleum products; reduced availability of natural gas or other commodities for transporting, processing, storing, or delivering; slowdowns in new construction; extreme weather or other natural disasters; and threats of attack by terrorists on energy assets. Additionally, energy sector companies are subject to substantial government regulation and changes in the regulatory environment for energy companies may adversely impact their profitability. Over time, depletion of natural gas reserves and other energy reserves may also affect the profitability of energy companies.
The Frontier Economic Fund \| Sector Risk, Industrials Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	Industrials Sector Risk. The industrials sector can be significantly affected by, among other things, worldwide economic growth, supply and demand for specific products and services, rapid technological developments, international political and economic developments, environmental issues, tariffs and trade barriers, and tax and governmental regulatory policies. As the demand for, or prices of, industrials increase, the value of the Fund’s investments generally would be expected to also increase. Conversely, declines in the demand for, or prices of, industrials generally would be expected to contribute to declines in the value of such securities. Such declines may occur quickly and without warning and may negatively impact the value of the Fund and your investment.
The Frontier Economic Fund \| Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
The Frontier Economic Fund \| Risk Nondiversified Status [Member]
Prospectus [Line Items]
Risk [Text Block]	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.

Investment Risks

Jun. 30, 2026

Concentration Risk. The Fund’s investments will be concentrated in an industry or group of industries to the extent that the Index is so concentrated, and the Index is expected to be concentrated in real estate-related industries. Accordingly, the value of Shares may rise and fall more than the value of shares of a fund that invests in securities of companies in a broader range of industries. In addition, at times, real estate-related industries may be out of favor and underperform other industries or groups of industries or the market as a whole.

U.S. Diversified Real Estate ETF | Equity Market Risk Member

Prospectus [Line Items]

Risk [Text Block]

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, regional armed conflict, acts of terrorism, market volatility related to global trade policy and the imposition of tariffs, the 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. Diversified Real Estate ETF | ETF Risks Member

Prospectus [Line Items]

Risk [Text Block]

•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.

◦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. 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. Diversified Real Estate ETF | ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member

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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. Diversified Real Estate ETF | ETF Risks, Costs Of Buying Or Selling Shares Risk Member

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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. Diversified Real Estate ETF | ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member

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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.

U.S. Diversified Real Estate ETF | ETF Risks, Trading Risk Member

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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. 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. Diversified Real Estate ETF | Models And Data Risk Member

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Models and Data Risk. The composition of the Index is heavily dependent on a proprietary quantitative model as well as information and data supplied by third parties (“Models and Data”). When Models and Data prove to be incorrect or incomplete, any decisions made in reliance thereon may lead to the inclusion or exclusion of securities from the Index that would have been excluded or included had the Models and Data been correct and complete. If the composition of the Index reflects such errors, the Fund’s portfolio can be expected to reflect the errors, too.

U.S. Diversified Real Estate ETF | Passive Investment Risk Member

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Passive Investment Risk. The Fund is not actively managed, and its adviser would not sell shares of an equity security due to current or projected underperformance of a security, industry, or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution or rebalancing of the Index in accordance with the Index methodology.

U.S. Diversified Real Estate ETF | Real Estate Investment Risk Member

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Real Estate Investment Risk. Investments in real estate companies involve unique risks. Real estate companies, including REITs and real estate operating companies, may have limited financial resources, may trade less frequently and in limited volume, and may be more volatile than other securities. Investing in real estate companies entails certain risks associated with the direct ownership of real estate, such as a decrease in value of real estate, as well as the real estate industry in general. Many factors may affect real estate values, including general, regional and local economic conditions, fluctuations in interest rates and property tax rates, the amount of new construction in a particular area, laws and regulations affecting real estate (including zoning and tax laws, environmental regulations, and other governmental action, such as the exercise of eminent domain), and the costs of owning, maintaining and improving real estate. The availability of mortgages may also affect real estate values. Real estate companies are also subject to heavy cash flow dependency, increased operating expenses, the skill of management, changes in property values and rental rates, overbuilding, losses due to natural disasters, casualty or condemnation, defaults by borrowers, and self-liquidation. In addition to these risks, property-owning REITs may be affected by changes in the value of the underlying property owned by the trusts, while mortgage-based REITs may be affected by the quality of any credit extended. REITs are also subject to heavy cash flow dependency, defaults by borrowers and self-liquidation. In addition, U.S. REITs could possibly fail to qualify for the beneficial tax treatment available to REITs under the Internal Revenue Code of 1986, as amended (the “Code”), or to maintain their exemptions from registration under the Investment Company Act of 1940, as amended (the “1940 Act”). The Fund expects that dividends received from a REIT and distributed to Fund shareholders generally will be taxable to the shareholder as ordinary income. The above factors may also adversely affect a borrower’s or a lessee’s ability to meet its obligations to the REIT. In the event of a default by a borrower or lessee, the REIT may experience delays in enforcing its rights as a mortgagee or lessor and may incur substantial costs associated with protecting investments. In addition, the Fund holds interests in REITs, and it is expected that investors in the Fund will bear two layers of asset-based management fees and expenses (directly at the Fund level and indirectly at the REIT level).

U.S. Diversified Real Estate ETF | Smaller Companies Risk Member

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Smaller Companies Risk. The equity securities of smaller companies have historically been subject to greater investment risk than securities of larger companies. The prices of equity securities of smaller companies tend to be more volatile and less liquid than the prices of equity securities of larger companies.

U.S. Diversified Real Estate ETF | Tracking Error Risk Member

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•Tracking Error Risk. As with all index funds, the performance of the Fund and the Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

U.S. Diversified Real Estate ETF | Risk Lose Money [Member]

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

The Frontier Economic Fund | Equity Market Risk Member

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The Frontier Economic Fund | ETF Risks Member

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

◦Trading. Although Shares are listed for trading on the New York Stock Exchange (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.

The Frontier Economic Fund | ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member

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The Frontier Economic Fund | ETF Risks, Costs Of Buying Or Selling Shares Risk Member

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Risk [Text Block]

The Frontier Economic Fund | ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member

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The Frontier Economic Fund | ETF Risks, Trading Risk Member

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Trading. Although Shares are listed for trading on the New York Stock Exchange (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.

The Frontier Economic Fund | Passive Investment Risk Member

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Passive Investment Risk. The Fund invests in the securities included in, or representative of, the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index.

The Frontier Economic Fund | Tracking Error Risk Member

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Tracking Error Risk. As with all index funds, the performance of the Fund and the Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

The Frontier Economic Fund | ADR Risk Member

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ADR Risk. ADRs 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. ADRs listed on U.S. exchanges are issued by banks or trust companies, and ADRs entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares.

The Frontier Economic Fund | Foreign Securities Risk Member

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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.

The Frontier Economic Fund | Geographic Investment Risk Member

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Geographic Investment Risk. The Fund invests primarily in the securities of Alaska Companies. As a result, the Fund is more likely to be impacted by events or conditions affecting Alaska. For example, political and economic conditions and changes in regulatory, tax, or economic policy in Alaska could significantly affect Alaska Companies, result in significant market volatility, and have a negative impact on the Fund’s performance. In particular, the economic success of Alaska Companies may depend upon their access to natural resources and commodities located in Alaska, which may be barred or limited by the local, state, or federal government. In addition, Alaska’s environment and local economy is subject to significant risks related to the impact of climate change, such as sea level rise, thawing permafrost, coastal erosion, as well as natural disasters such as earthquakes, wildfire, and tsunamis.

The Frontier Economic Fund | Market Capitalization Risk Member

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Market Capitalization Risk.

◦Large-Capitalization Investing Risk. The Fund may invest in the securities of large-capitalization companies. 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 Risk. The Fund may invest in the securities of mid-capitalization companies. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies, but they may also be subject to slower growth than small-capitalization companies during times of economic expansion. 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. Mid-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs, and earnings.

◦Small-Capitalization Investing Risk. The Fund may invest in the securities of small-capitalization companies. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of larger-capitalization companies. The securities of small-capitalization companies generally trade in lower

volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies also may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

The Frontier Economic Fund | Market Capitalization Risk, Large-Capitalization Investing Risk Member

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Large-Capitalization Investing Risk. The Fund may invest in the securities of large-capitalization companies. 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.

The Frontier Economic Fund | Market Capitalization Risk, Mid-Capitalization Investing Risk Member

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Mid-Capitalization Investing Risk. The Fund may invest in the securities of mid-capitalization companies. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies, but they may also be subject to slower growth than small-capitalization companies during times of economic expansion. 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. Mid-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs, and earnings.

The Frontier Economic Fund | Market Capitalization Risk, Small-Capitalization Investing Risk Member

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Small-Capitalization Investing Risk. The Fund may invest in the securities of small-capitalization companies. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of larger-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies also may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

The Frontier Economic Fund | MLP Risk Member

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MLP Risk. MLP investment returns are enhanced during periods of declining or low interest rates and tend to be negatively influenced when interest rates are rising. In addition, most MLPs are fairly leveraged and typically carry a portion of a “floating” rate debt. As such, a significant upward swing in interest rates would also drive interest expense higher. Furthermore, most MLPs grow by acquisitions partly financed by debt, and higher interest rates could make it more difficult to make acquisitions. MLP investments also entail many of the general tax risks of investing in a partnership. Limited partners in an MLP typically have limited control and limited rights to vote on matters affecting the partnership. Additionally, there is always the risk that an MLP will fail to qualify for favorable tax treatment.

The Frontier Economic Fund | New Fund Risk Member

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New Fund Risk. The Fund is a recently organized investment company with limited operating history. As a result, prospective investors have limited track record or history on which to base their investment decision.

The Frontier Economic Fund | Sector Risk Member

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•Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund may invest a significant portion of its assets in the following sectors and, therefore, the performance of the Fund could be negatively impacted by events affecting each of these sectors.

◦Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and such companies may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability.

◦Energy Sector Risk. The energy sector is comprised of energy, industrial, infrastructure, and logistics companies, and will therefore be susceptible to adverse economic, environmental, business, regulatory, or other occurrences affecting that sector. The energy sector has historically experienced substantial price volatility. At times, the performance of these investments may lag the performance of other sectors or the market as a whole. Companies operating in the energy sector are subject to specific risks, including, among others, fluctuations in commodity prices; reduced consumer demand for commodities such as oil, natural gas, or petroleum products; reduced availability of natural gas or other commodities for transporting, processing, storing, or delivering; slowdowns in new construction; extreme weather or other natural disasters; and threats of attack by terrorists on energy assets. Additionally, energy sector companies are subject to substantial government regulation and changes in the regulatory environment for energy companies may adversely impact their profitability. Over time, depletion of natural gas reserves and other energy reserves may also affect the profitability of energy companies.

◦Industrials Sector Risk. The industrials sector can be significantly affected by, among other things, worldwide economic growth, supply and demand for specific products and services, rapid technological developments, international political and economic developments, environmental issues, tariffs and trade barriers, and tax and governmental regulatory policies. As the demand for, or prices of, industrials increase, the value of the Fund’s investments generally would be expected to also increase. Conversely, declines in the demand for, or prices of, industrials generally would be expected to contribute to declines in the value of such securities. Such declines may occur quickly and without warning and may negatively impact the value of the Fund and your investment.

The Frontier Economic Fund | Sector Risk, Consumer Discretionary Sector Risk Member

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Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and such companies may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability.

The Frontier Economic Fund | Sector Risk, Energy Sector Risk Member

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Energy Sector Risk. The energy sector is comprised of energy, industrial, infrastructure, and logistics companies, and will therefore be susceptible to adverse economic, environmental, business, regulatory, or other occurrences affecting that sector. The energy sector has historically experienced substantial price volatility. At times, the performance of these investments may lag the performance of other sectors or the market as a whole. Companies operating in the energy sector are subject to specific risks, including, among others, fluctuations in commodity prices; reduced consumer demand for commodities such as oil, natural gas, or petroleum products; reduced availability of natural gas or other commodities for transporting, processing, storing, or delivering; slowdowns in new construction; extreme weather or other natural disasters; and threats of attack by terrorists on energy assets. Additionally, energy sector companies are subject to substantial government regulation and changes in the regulatory environment for energy companies may adversely impact their profitability. Over time, depletion of natural gas reserves and other energy reserves may also affect the profitability of energy companies.

The Frontier Economic Fund | Sector Risk, Industrials Sector Risk Member

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Industrials Sector Risk. The industrials sector can be significantly affected by, among other things, worldwide economic growth, supply and demand for specific products and services, rapid technological developments, international political and economic developments, environmental issues, tariffs and trade barriers, and tax and governmental regulatory policies. As the demand for, or prices of, industrials increase, the value of the Fund’s investments generally would be expected to also increase. Conversely, declines in the demand for, or prices of, industrials generally would be expected to contribute to declines in the value of such securities. Such declines may occur quickly and without warning and may negatively impact the value of the Fund and your investment.

The Frontier Economic Fund | Risk Lose Money [Member]

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

The Frontier Economic Fund | Risk Nondiversified Status [Member]

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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.