Investment Risks - GlacierShares Arctic Circle ETF	Sep. 23, 2025
Concentration Risk Member
Prospectus [Line Items]
Risk [Text Block]	Concentration Risk. Because the Fund’s assets will be concentrated in an industry or group of industries to the extent the Index concentrates in a particular industry or group of industries, the Fund is subject to loss due to adverse occurrences that may affect that industry or group of industries.
Currency Exchange Rate Risk Member
Prospectus [Line Items]
Risk [Text Block]	Currency Exchange Rate Risk. The Fund may invest in investments denominated in non-U.S. currencies or in securities that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investment and the value of your Shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.
Cybersecurity Risk Member
Prospectus [Line Items]
Risk [Text Block]	Cybersecurity Risk. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets or proprietary information, or cause the Fund, the Adviser, and/or other service providers (including custodians and financial intermediaries) to suffer data breaches or data corruption. Additionally, cybersecurity failures or breaches of the electronic systems of the Fund, the Adviser, the Fund’s other service providers, market makers, Authorized Participants (“APs”), the Fund’s primary listing exchange, or the issuers of securities in which the Fund invests have the ability to disrupt and negatively affect the Fund’s business operations, including the ability to purchase and sell Shares, potentially resulting in financial losses to the Fund and its shareholders.
Depositary Receipt Risk Member
Prospectus [Line Items]
Risk [Text Block]	Depositary Receipt Risk. Depositary receipts, including ADRs, EDRs and GDRs, involve risks similar to those associated with investments in foreign securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Depositary receipts listed on U.S. exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). GDRs and EDRs are similar to ADRs in that they are certificates evidencing ownership of shares of a foreign issuer; however, GDRs and EDRs may be issued in bearer form and denominated in other currencies and are generally designed for use in specific or multiple securities markets outside the U.S. When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares. Because the Underlying Shares trade on foreign exchanges that may be closed when the Fund’s primary listing exchange is open, the Fund may experience premiums and discounts greater than those of funds without exposure to such Underlying Shares.
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, sectors or companies in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stocks and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.
ETF Risks Member
Prospectus [Line Items]
Risk [Text Block]	•ETF Risks. The Fund is an exchange-traded fund (“ETF”) and, as a result of its 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 APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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 Risk. 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 Risk. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums or discounts greater than those of ETFs that invest in and hold only securities and other investments that are listed and trade in the U.S. ◦Trading Risk. Although Shares are listed for trading on the NASDAQ Stock Market, LLC (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 the Shares.
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 APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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.
ETF Risks, Costs Of Buying Or Selling Shares Risk Member
Prospectus [Line Items]
Risk [Text Block]	Costs of Buying or Selling Shares Risk. 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.
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 Risk. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums or discounts greater than those of ETFs that invest in and hold only securities and other investments that are listed and trade in the U.S.
ETF Risks, Trading Risk Member
Prospectus [Line Items]
Risk [Text Block]	Trading Risk. Although Shares are listed for trading on the NASDAQ Stock Market, LLC (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 the Shares.
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. These include risks of adverse changes in foreign economic, political, regulatory and other conditions, or changes in currency exchange rates or exchange control regulations (including limitations on currency movements and exchanges). The securities of some foreign companies may be less liquid and, at times, more volatile than securities of comparable U.S. companies. There may be less information publicly available about a non-U.S. issuer than a U.S. issuer. Non-U.S. issuers may be subject to different accounting, auditing, financial reporting and investor protection standards than U.S. issuers. 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. With respect to certain countries, there is the possibility of government intervention and expropriation or nationalization of assets. Because legal systems differ, there also is the possibility that it will be difficult to obtain or enforce legal judgments in certain countries. Since foreign exchanges may be open on days when the Fund does not price its shares, the value of the securities in the Fund’s portfolio may change on days when shareholders will not be able to purchase or sell the Fund’s shares. Conversely, Shares may trade on days when foreign exchanges are closed. Each of these factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.
Geographic Investment Risk Member
Prospectus [Line Items]
Risk [Text Block]	Geographic Investment Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies of a single country or region, it is more likely to be impacted by events or conditions affecting that country or region. ◦Risks Related to Investing in Canada. The Canadian and U.S. economies are closely integrated. The United States is Canada’s largest trading partner and foreign investor and the Canadian economy is significantly affected by developments in the U.S. economy. Canada is a major producer of forest products, metals, agricultural products, and energy-related products, such as oil, gas, and hydroelectricity. As a result, the Canadian economy is very dependent on the demand for, and supply and price of, natural resources, and the Canadian market is relatively concentrated in issuers involved in the production and distribution of natural resources. Canada’s economic growth may be significantly affected by disruptions in its relationship with major trading partners, fluctuations in currency, and global demand for commodities. ◦Risks Related to Investing in the Faroe Islands. The Faroe Islands are an autonomous territory of Denmark. Investments in companies from the Faroe Islands involve risks that are specific to the Faroe Islands, including, legal, regulatory, political, currency, security and economic risks. Faroe Islands has a small population and a small economy focused significantly on fishing and ocean- and ship-related industries. Faroe Islands has an aging population, which has led to challenges in recruiting care professionals and could lead to labor supply shortages in the near future. The Faroe Islands is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population. ◦Risks Related to Investing in Finland. Investments in Finnish issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Finland. Finland’s economy depends on, among other things, imported raw materials, energy and components for its manufactured products. As a result, Finland is dependent on trading relationships with certain key trading partners, including Germany, Sweden, Russia and the U.S. Furthermore, Finland’s economy is facing demographic challenges, including an aging population, that could lead to labor supply shortages in the near future. ◦Risks Related to Investing in Greenland. Greenland is an autonomous territory of Denmark. Investments in companies from Greenland involve risks that are specific to Greenland, including, legal, regulatory, political, currency, security and economic risks. Greenland has a small population and GDP, with an economy focused on fishing and mining and a high percentage of public sector service employees and relatively little advanced infrastructure. In addition, although it is believed Greenland has large stores of untapped resources, access to these resources is currently inaccessible across much of the territory. These resources have also made it the subject of intense political and economic discussion among other countries, which could lead to political instability in the future. Greenland is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population. ◦Risks Related to Investing in Iceland. Investment in Icelandic issuers involves risks that are specific to Iceland, including, legal, regulatory, political, currency, security and economic risks. Iceland is a small country with an economy focused on energy production, tourism, fishing and smelting aluminum. As a result, Iceland is dependent on trading relationships with certain key trading partners, including the United States, the United Kingdom, the Netherlands and other European Union (“EU”) countries. Iceland’s top exports are aluminum and fish and tourism has become a major source of revenue for the country. ◦Risks Related to Investing in Nordic Countries. The Index includes issuers of Nordic countries, which may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to each of the Nordic countries. The economies of the Nordic countries are heavily dependent on natural resources and trade amongst one another and with the members of the EU. Decreasing European imports, new trade regulations, changes in exchange rates, a recession in Europe, or a slowing of economic growth in this region could have an adverse impact on the securities in which the Fund invests. The Nordic countries have historically maintained generous welfare programs. Such welfare programs can negatively impact the economies of the Nordic countries by causing increased government spending, higher production costs and lower productivity. ◦Risks Related to Investing in Norway. Investments in Norwegian issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Norway. Norway is a major producer of oil and gas, and Norway’s economy is subject to the risk of fluctuations on oil and gas prices. The high value of the Norwegian krone as compared to other currencies could have a damaging effect on Norwegian exports and investments. In recent years, labor costs in Norway have increased faster than those of its major trading partners, eroding industrial competitiveness. ◦Risks Related to Investing in Sweden. Investments in Swedish issuers may subject the Fund to legal, regulatory, political, currency, security and economic risks specific to Sweden. Sweden has a highly developed welfare system and the level of union membership in Sweden is substantial. These factors can negatively impact the Swedish economy by causing increased government spending, higher production costs and lower productivity, among other things.
Geographic Investment, Risks Related To Investing In Canada Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in Canada. The Canadian and U.S. economies are closely integrated. The United States is Canada’s largest trading partner and foreign investor and the Canadian economy is significantly affected by developments in the U.S. economy. Canada is a major producer of forest products, metals, agricultural products, and energy-related products, such as oil, gas, and hydroelectricity. As a result, the Canadian economy is very dependent on the demand for, and supply and price of, natural resources, and the Canadian market is relatively concentrated in issuers involved in the production and distribution of natural resources. Canada’s economic growth may be significantly affected by disruptions in its relationship with major trading partners, fluctuations in currency, and global demand for commodities.
Geographic Investment, Risks Related To Investing In Faroe Islands Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in the Faroe Islands. The Faroe Islands are an autonomous territory of Denmark. Investments in companies from the Faroe Islands involve risks that are specific to the Faroe Islands, including, legal, regulatory, political, currency, security and economic risks. Faroe Islands has a small population and a small economy focused significantly on fishing and ocean- and ship-related industries. Faroe Islands has an aging population, which has led to challenges in recruiting care professionals and could lead to labor supply shortages in the near future. The Faroe Islands is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population.
Geographic Investment, Risks Related To Investing In Finland Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in Finland. Investments in Finnish issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Finland. Finland’s economy depends on, among other things, imported raw materials, energy and components for its manufactured products. As a result, Finland is dependent on trading relationships with certain key trading partners, including Germany, Sweden, Russia and the U.S. Furthermore, Finland’s economy is facing demographic challenges, including an aging population, that could lead to labor supply shortages in the near future.
Geographic Investment, Risks Related To Investing In Greenland Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in Greenland. Greenland is an autonomous territory of Denmark. Investments in companies from Greenland involve risks that are specific to Greenland, including, legal, regulatory, political, currency, security and economic risks. Greenland has a small population and GDP, with an economy focused on fishing and mining and a high percentage of public sector service employees and relatively little advanced infrastructure. In addition, although it is believed Greenland has large stores of untapped resources, access to these resources is currently inaccessible across much of the territory. These resources have also made it the subject of intense political and economic discussion among other countries, which could lead to political instability in the future. Greenland is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population.
Geographic Investment, Risks Related To Investing In Iceland Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in Iceland. Investment in Icelandic issuers involves risks that are specific to Iceland, including, legal, regulatory, political, currency, security and economic risks. Iceland is a small country with an economy focused on energy production, tourism, fishing and smelting aluminum. As a result, Iceland is dependent on trading relationships with certain key trading partners, including the United States, the United Kingdom, the Netherlands and other European Union (“EU”) countries. Iceland’s top exports are aluminum and fish and tourism has become a major source of revenue for the country.
Geographic Investment, Risks Related To Investing In Nordic Countries Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in Nordic Countries. The Index includes issuers of Nordic countries, which may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to each of the Nordic countries. The economies of the Nordic countries are heavily dependent on natural resources and trade amongst one another and with the members of the EU. Decreasing European imports, new trade regulations, changes in exchange rates, a recession in Europe, or a slowing of economic growth in this region could have an adverse impact on the securities in which the Fund invests. The Nordic countries have historically maintained generous welfare programs. Such welfare programs can negatively impact the economies of the Nordic countries by causing increased government spending, higher production costs and lower productivity.
Geographic Investment, Risks Related To Investing In Norway Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in Norway. Investments in Norwegian issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Norway. Norway is a major producer of oil and gas, and Norway’s economy is subject to the risk of fluctuations on oil and gas prices. The high value of the Norwegian krone as compared to other currencies could have a damaging effect on Norwegian exports and investments. In recent years, labor costs in Norway have increased faster than those of its major trading partners, eroding industrial competitiveness.
Geographic Investment, Risks Related To Investing In Sweden Risk Member
Prospectus [Line Items]
Risk [Text Block]	Risks Related to Investing in Sweden. Investments in Swedish issuers may subject the Fund to legal, regulatory, political, currency, security and economic risks specific to Sweden. Sweden has a highly developed welfare system and the level of union membership in Sweden is substantial. These factors can negatively impact the Swedish economy by causing increased government spending, higher production costs and lower productivity, among other things.
Market Risk Member
Prospectus [Line Items]
Risk [Text Block]	Market Risk. The trading prices of securities and other instruments fluctuate in response to a variety of factors. These factors include events impacting the entire market or specific market segments, such as political, market and economic developments, as well as events that impact specific issuers. The Fund’s NAV and market price, like security and commodity prices generally, may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time. U.S. and international markets have experienced significant periods of volatility in recent years due to a number of these factors, including the impact of the COVID-19 pandemic and related public health issues, growth concerns in the U.S. and overseas, uncertainties regarding interest rates, trade tensions and the threat of and/or actual imposition of tariffs by the U.S. and other countries. In addition, local, regional or global events such as war, including Russia’s invasion of Ukraine, acts of terrorism, recessions, rising inflation, or other events could have a significant negative impact on the Fund and its investments. These developments as well as other events could result in further market volatility and negatively affect financial asset prices, the liquidity of certain securities and the normal operations of securities exchanges and other markets.
New Fund Risk Member
Prospectus [Line Items]
Risk [Text Block]	New Fund Risk. The Fund is a recently organized investment company with no operating history. As a result, prospective investors have no track record or history on which to base their investment decision.
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 rebalancing of the Index as addressed in the Index methodology.
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. ◦Financial Sector Risk. Financial services companies are subject to extensive governmental regulation, which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees that they can charge, the scope of their activities, the prices they can charge and the amount of capital that they must maintain. Profitability is largely dependent on the availability and cost of capital funds and can fluctuate significantly when interest rates change or due to increased competition. In addition, deterioration of the credit markets generally may adversely impact a broad range of markets, thereby affecting a wide range of financial institutions and markets. Certain events in the financial sector may cause an unusually high degree of volatility in the financial markets, both domestic and foreign, and cause certain financial services companies to incur large losses. Securities of financial services companies may experience a dramatic decline in value when such companies experience substantial declines in the valuations of their assets, take action to raise capital (such as the issuance of debt or equity securities), or cease operations. Credit losses resulting from financial difficulties of borrowers and financial losses associated with investment activities can negatively impact the sector. Insurance companies may be subject to major price competition. Adverse economic, business or political developments could adversely affect financial institutions engaged in mortgage finance or other lending or investing activities directly or indirectly connected to the value of real estate. ◦Industrial Sector Risk. Companies in the industrial sector may be adversely affected by changes in the supply and demand for products and services, product obsolescence or discontinuance, claims for environmental damage or product liability and changes in general economic conditions, among other factors. Government regulation, word events, exchange rates and economic conditions, technological developments and liabilities for environmental damage and general civil liabilities will also affect the performance of these companies. Aerospace and defense companies, a component of the industrial sector, can be significantly affected by government spending policies because companies involved in this industry rely (to a significant extent) on U.S. and foreign government demand for their products and services. Therefore, the financial condition of, and investor interest in, aerospace and defense companies are heavily influenced by governmental defense spending policies, which are typically under pressure from efforts to control the U.S. and other government budgets. Transportation securities, a component of the industrial sector, are cyclical and have occasional sharp price movements which may result from changes in the economy, fuel prices, labor agreements and insurance costs.
Sector Risk, Financial Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	Financial Sector Risk. Financial services companies are subject to extensive governmental regulation, which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees that they can charge, the scope of their activities, the prices they can charge and the amount of capital that they must maintain. Profitability is largely dependent on the availability and cost of capital funds and can fluctuate significantly when interest rates change or due to increased competition. In addition, deterioration of the credit markets generally may adversely impact a broad range of markets, thereby affecting a wide range of financial institutions and markets. Certain events in the financial sector may cause an unusually high degree of volatility in the financial markets, both domestic and foreign, and cause certain financial services companies to incur large losses. Securities of financial services companies may experience a dramatic decline in value when such companies experience substantial declines in the valuations of their assets, take action to raise capital (such as the issuance of debt or equity securities), or cease operations. Credit losses resulting from financial difficulties of borrowers and financial losses associated with investment activities can negatively impact the sector. Insurance companies may be subject to major price competition. Adverse economic, business or political developments could adversely affect financial institutions engaged in mortgage finance or other lending or investing activities directly or indirectly connected to the value of real estate.
Sector Risk, Industrial Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	Industrial Sector Risk. Companies in the industrial sector may be adversely affected by changes in the supply and demand for products and services, product obsolescence or discontinuance, claims for environmental damage or product liability and changes in general economic conditions, among other factors. Government regulation, word events, exchange rates and economic conditions, technological developments and liabilities for environmental damage and general civil liabilities will also affect the performance of these companies. Aerospace and defense companies, a component of the industrial sector, can be significantly affected by government spending policies because companies involved in this industry rely (to a significant extent) on U.S. and foreign government demand for their products and services. Therefore, the financial condition of, and investor interest in, aerospace and defense companies are heavily influenced by governmental defense spending policies, which are typically under pressure from efforts to control the U.S. and other government budgets. Transportation securities, a component of the industrial sector, are cyclical and have occasional sharp price movements which may result from changes in the economy, fuel prices, labor agreements and insurance costs.
Securities Lending Risk Member
Prospectus [Line Items]
Risk [Text Block]	Securities Lending Risk. There are certain risks associated with securities lending, including the risk that the borrower may fail to return the securities on a timely basis or even the loss of rights in the collateral deposited by the borrower, if the borrower should fail financially. The Fund could also lose money in the event of a decline in the value of collateral provided for loaned securities or a decline in the value of any investments made with cash collateral. As a result the Fund may lose money.
Small-Capitalization Company Risk Member
Prospectus [Line Items]
Risk [Text Block]	Small-Capitalization Company Risk. Small-capitalization companies are subject to substantially greater risks of loss and price fluctuations because their earnings and revenues tend to be less predictable (and some companies may be experiencing significant losses). Their share prices tend to be more volatile and their markets less liquid than companies with larger market capitalizations. The shares of small-capitalization companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the future ability to sell these securities.
Tracking Error Risk Member
Prospectus [Line Items]
Risk [Text Block]	Tracking Error Risk. As with all index funds, the performance of the Fund and its 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.
Underlying Index Risk Member
Prospectus [Line Items]
Risk [Text Block]	Underlying Index Risk. Neither the Adviser nor the Index Provider, the index provider and calculation agent for the Index, is able to guarantee the continuous availability or timeliness of the production of the Index. The calculation and dissemination of the Index values may be delayed if the information technology or other facilities of the Index Provider, data providers and/or relevant stock exchange malfunction for any reason. A significant delay may cause trading in shares of the Fund to be suspended. Errors in Index data, computation and/or the construction in accordance with its methodology may occur from time to time and may not be identified and corrected by the Index Provider or other applicable party for a period of time or at all, which may have an adverse impact on the Fund and its shareholders. Index providers generally do not provide any representation or warranty in relation to the quality, accuracy or completeness of data in the indexes in which they license, and generally do not guarantee that an index will be calculated in accordance with its stated methodology. Losses or costs associated with any index provider errors generally will be borne by the Fund and its shareholders.
Valuation Risk Member
Prospectus [Line Items]
Risk [Text Block]	Valuation Risk. The Fund may hold securities or other assets that may be valued on the basis of factors other than market quotations. This may occur because the asset or security does not trade on a centralized exchange, or in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” assets or securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time. The Adviser’s ability to value investments may be impacted by technological issues or errors by pricing services or other third-party service providers.
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.
Risk Nondiversified Status [Member]
Prospectus [Line Items]
Risk [Text Block]	Non-Diversification Risk. The Fund is considered to be non-diversified, which means it may invest a greater percentage of its assets in the securities of a single issuer or a lesser number of issuers than if it was 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 lesser number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively small number of issuers to have a greater impact on the Fund’s performance.

Investment Risks - GlacierShares Arctic Circle ETF

Sep. 23, 2025

Concentration Risk. Because the Fund’s assets will be concentrated in an industry or group of industries to the extent the Index concentrates in a particular industry or group of industries, the Fund is subject to loss due to adverse occurrences that may affect that industry or group of industries.

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Risk [Text Block]

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

Cybersecurity Risk Member

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Risk [Text Block]

Cybersecurity Risk. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets or proprietary information, or cause the Fund, the Adviser, and/or other service providers (including custodians and financial intermediaries) to suffer data breaches or data corruption. Additionally, cybersecurity failures or breaches of the electronic systems of the Fund, the Adviser, the Fund’s other service providers, market makers, Authorized Participants (“APs”), the Fund’s primary listing exchange, or the issuers of securities in which the Fund invests have the ability to disrupt and negatively affect the Fund’s business operations, including the ability to purchase and sell Shares, potentially resulting in financial losses to the Fund and its shareholders.

Depositary Receipt Risk Member

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Risk [Text Block]

Depositary Receipt Risk. Depositary receipts, including ADRs, EDRs and GDRs, involve risks similar to those associated with investments in foreign securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Depositary receipts listed on U.S. exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). GDRs and EDRs are similar to ADRs in that they are certificates evidencing ownership of shares of a foreign issuer; however, GDRs and EDRs may be issued in bearer form and denominated in other currencies and are generally designed for use in specific or multiple securities markets outside the U.S. When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares. Because the Underlying Shares trade on foreign exchanges that may be closed when the Fund’s primary listing exchange is open, the Fund may experience premiums and discounts greater than those of funds without exposure to such Underlying Shares.

Equity Market Risk Member

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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, sectors or companies in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stocks and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

ETF Risks Member

Prospectus [Line Items]

Risk [Text Block]

•ETF Risks. The Fund is an exchange-traded fund (“ETF”) and, as a result of its 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 APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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 Risk. 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 Risk. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums or discounts greater than those of ETFs that invest in and hold only securities and other investments that are listed and trade in the U.S.

◦Trading Risk. Although Shares are listed for trading on the NASDAQ Stock Market, LLC (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 the Shares.

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 APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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.

ETF Risks, Costs Of Buying Or Selling Shares Risk Member

Prospectus [Line Items]

Risk [Text Block]

Costs of Buying or Selling Shares Risk. 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.

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

ETF Risks, Trading Risk Member

Prospectus [Line Items]

Risk [Text Block]

Trading Risk. Although Shares are listed for trading on the NASDAQ Stock Market, LLC (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 the Shares.

Foreign Securities Risk Member

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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. These include risks of adverse changes in foreign economic, political, regulatory and other conditions, or changes in currency exchange rates or exchange control regulations (including limitations on currency movements and exchanges). The securities of some foreign companies may be less liquid and, at times, more volatile than securities of comparable U.S. companies. There may be less information publicly available about a non-U.S. issuer than a U.S. issuer. Non-U.S. issuers may be subject to different accounting, auditing, financial reporting and investor protection standards than U.S. issuers. 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. With respect to certain countries, there is the possibility of government intervention and expropriation or nationalization of assets. Because legal systems differ, there also is the possibility that it will be difficult to obtain or enforce legal judgments in certain countries. Since foreign exchanges may be open on days when the Fund does not price its shares, the value of the securities in the Fund’s portfolio may change on days when shareholders will not be able to purchase or sell the Fund’s shares. Conversely, Shares may trade on days when foreign exchanges are closed. Each of these factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.

Geographic Investment Risk Member

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

◦Risks Related to Investing in Canada. The Canadian and U.S. economies are closely integrated. The United States is Canada’s largest trading partner and foreign investor and the Canadian economy is significantly affected by developments in the U.S. economy. Canada is a major producer of forest products, metals, agricultural products, and energy-related products, such as oil, gas, and hydroelectricity. As a result, the Canadian economy is very dependent on the demand for, and supply and price of, natural resources, and the Canadian market is relatively concentrated in issuers involved in the production and distribution of natural resources. Canada’s economic growth may be significantly affected by disruptions in its relationship with major trading partners, fluctuations in currency, and global demand for commodities.

◦Risks Related to Investing in the Faroe Islands. The Faroe Islands are an autonomous territory of Denmark. Investments in companies from the Faroe Islands involve risks that are specific to the Faroe Islands, including, legal, regulatory, political, currency, security and economic risks. Faroe Islands has a small population and a small economy focused significantly on fishing and ocean- and ship-related industries. Faroe Islands has an aging population, which has led to challenges in recruiting care professionals and could lead to labor supply shortages in the near future. The Faroe Islands is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population.

◦Risks Related to Investing in Finland. Investments in Finnish issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Finland. Finland’s economy depends on, among other things, imported raw materials, energy and components for its manufactured products. As a result, Finland is dependent on trading relationships with certain key trading partners, including Germany, Sweden, Russia and the U.S. Furthermore, Finland’s economy is facing demographic challenges, including an aging population, that could lead to labor supply shortages in the near future.

◦Risks Related to Investing in Greenland. Greenland is an autonomous territory of Denmark. Investments in companies from Greenland involve risks that are specific to Greenland, including, legal, regulatory, political, currency, security and economic risks. Greenland has a small population and GDP, with an economy focused on fishing and mining and a high percentage of public sector service employees and relatively little advanced infrastructure. In addition, although it is believed Greenland has large stores of untapped resources, access to these resources is currently inaccessible across much of the territory. These resources have also made it the subject of intense political and economic discussion among other countries, which could lead to political instability in the future. Greenland is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population.

◦Risks Related to Investing in Iceland. Investment in Icelandic issuers involves risks that are specific to Iceland, including, legal, regulatory, political, currency, security and economic risks. Iceland is a small country with an economy focused on energy production, tourism, fishing and smelting aluminum. As a result, Iceland is dependent on trading relationships with certain key trading partners, including the United States, the United Kingdom, the Netherlands and other European Union (“EU”) countries. Iceland’s top exports are aluminum and fish and tourism has become a major source of revenue for the country.

◦Risks Related to Investing in Nordic Countries. The Index includes issuers of Nordic countries, which may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to each of the Nordic countries. The economies of the Nordic countries are heavily dependent on natural resources and trade amongst one another and with the members of the EU. Decreasing European imports, new trade regulations, changes in exchange rates, a recession in Europe, or a slowing of economic growth in this region could have an adverse impact on the securities in which the Fund invests. The Nordic countries have historically maintained generous welfare programs. Such welfare programs can negatively impact the

economies of the Nordic countries by causing increased government spending, higher production costs and lower productivity.

◦Risks Related to Investing in Norway. Investments in Norwegian issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Norway. Norway is a major producer of oil and gas, and Norway’s economy is subject to the risk of fluctuations on oil and gas prices. The high value of the Norwegian krone as compared to other currencies could have a damaging effect on Norwegian exports and investments. In recent years, labor costs in Norway have increased faster than those of its major trading partners, eroding industrial competitiveness.

◦Risks Related to Investing in Sweden. Investments in Swedish issuers may subject the Fund to legal, regulatory, political, currency, security and economic risks specific to Sweden. Sweden has a highly developed welfare system and the level of union membership in Sweden is substantial. These factors can negatively impact the Swedish economy by causing increased government spending, higher production costs and lower productivity, among other things.

Geographic Investment, Risks Related To Investing In Canada Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in Canada. The Canadian and U.S. economies are closely integrated. The United States is Canada’s largest trading partner and foreign investor and the Canadian economy is significantly affected by developments in the U.S. economy. Canada is a major producer of forest products, metals, agricultural products, and energy-related products, such as oil, gas, and hydroelectricity. As a result, the Canadian economy is very dependent on the demand for, and supply and price of, natural resources, and the Canadian market is relatively concentrated in issuers involved in the production and distribution of natural resources. Canada’s economic growth may be significantly affected by disruptions in its relationship with major trading partners, fluctuations in currency, and global demand for commodities.

Geographic Investment, Risks Related To Investing In Faroe Islands Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in the Faroe Islands. The Faroe Islands are an autonomous territory of Denmark. Investments in companies from the Faroe Islands involve risks that are specific to the Faroe Islands, including, legal, regulatory, political, currency, security and economic risks. Faroe Islands has a small population and a small economy focused significantly on fishing and ocean- and ship-related industries. Faroe Islands has an aging population, which has led to challenges in recruiting care professionals and could lead to labor supply shortages in the near future. The Faroe Islands is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population.

Geographic Investment, Risks Related To Investing In Finland Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in Finland. Investments in Finnish issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Finland. Finland’s economy depends on, among other things, imported raw materials, energy and components for its manufactured products. As a result, Finland is dependent on trading relationships with certain key trading partners, including Germany, Sweden, Russia and the U.S. Furthermore, Finland’s economy is facing demographic challenges, including an aging population, that could lead to labor supply shortages in the near future.

Geographic Investment, Risks Related To Investing In Greenland Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in Greenland. Greenland is an autonomous territory of Denmark. Investments in companies from Greenland involve risks that are specific to Greenland, including, legal, regulatory, political, currency, security and economic risks. Greenland has a small population and GDP, with an economy focused on fishing and mining and a high percentage of public sector service employees and relatively little advanced infrastructure. In addition, although it is believed Greenland has large stores of untapped resources, access to these resources is currently inaccessible across much of the territory. These resources have also made it the subject of intense political and economic discussion among other countries, which could lead to political instability in the future. Greenland is also highly dependent upon economic assistance from Denmark and thus the Fund is also subject to the legal, regulatory, political, currency, security, and economic risks specific to Denmark. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges, including an aging population.

Geographic Investment, Risks Related To Investing In Iceland Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in Iceland. Investment in Icelandic issuers involves risks that are specific to Iceland, including, legal, regulatory, political, currency, security and economic risks. Iceland is a small country with an economy focused on energy production, tourism, fishing and smelting aluminum. As a result, Iceland is dependent on trading relationships with certain key trading partners, including the United States, the United Kingdom, the Netherlands and other European Union (“EU”) countries. Iceland’s top exports are aluminum and fish and tourism has become a major source of revenue for the country.

Geographic Investment, Risks Related To Investing In Nordic Countries Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in Nordic Countries. The Index includes issuers of Nordic countries, which may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to each of the Nordic countries. The economies of the Nordic countries are heavily dependent on natural resources and trade amongst one another and with the members of the EU. Decreasing European imports, new trade regulations, changes in exchange rates, a recession in Europe, or a slowing of economic growth in this region could have an adverse impact on the securities in which the Fund invests. The Nordic countries have historically maintained generous welfare programs. Such welfare programs can negatively impact the

economies of the Nordic countries by causing increased government spending, higher production costs and lower productivity.

Geographic Investment, Risks Related To Investing In Norway Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in Norway. Investments in Norwegian issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Norway. Norway is a major producer of oil and gas, and Norway’s economy is subject to the risk of fluctuations on oil and gas prices. The high value of the Norwegian krone as compared to other currencies could have a damaging effect on Norwegian exports and investments. In recent years, labor costs in Norway have increased faster than those of its major trading partners, eroding industrial competitiveness.

Geographic Investment, Risks Related To Investing In Sweden Risk Member

Prospectus [Line Items]

Risk [Text Block]

Risks Related to Investing in Sweden. Investments in Swedish issuers may subject the Fund to legal, regulatory, political, currency, security and economic risks specific to Sweden. Sweden has a highly developed welfare system and the level of union membership in Sweden is substantial. These factors can negatively impact the Swedish economy by causing increased government spending, higher production costs and lower productivity, among other things.

Market Risk Member

Prospectus [Line Items]

Risk [Text Block]

Market Risk. The trading prices of securities and other instruments fluctuate in response to a variety of factors. These factors include events impacting the entire market or specific market segments, such as political, market and economic developments, as well as events that impact specific issuers. The Fund’s NAV and market price, like security and commodity prices generally, may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time. U.S. and international markets have experienced significant periods of volatility in recent years due to a number of these factors, including the impact of the COVID-19 pandemic and related public health issues, growth concerns in the U.S. and overseas, uncertainties regarding interest rates, trade tensions and the threat of and/or actual imposition of tariffs by the U.S. and other countries. In addition, local, regional or global events such as war, including Russia’s invasion of Ukraine, acts of terrorism, recessions, rising inflation, or other events could have a significant negative impact on the Fund and its investments. These developments as well as other events could result in further market volatility and negatively affect financial asset prices, the liquidity of certain securities and the normal operations of securities exchanges and other markets.

New Fund Risk Member

Prospectus [Line Items]

Risk [Text Block]

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

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 rebalancing of the Index as addressed in the Index methodology.

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.

◦Financial Sector Risk. Financial services companies are subject to extensive governmental regulation, which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees that they can charge, the scope of their activities, the prices they can charge and the amount of capital that they must maintain. Profitability is largely dependent on the availability and cost of capital funds and can fluctuate significantly when interest rates change or due to increased competition. In addition, deterioration of the credit markets generally may adversely impact a broad range of markets, thereby affecting a wide range of financial institutions and markets. Certain events in the financial sector may cause an unusually high degree of volatility in the financial markets, both domestic and foreign, and cause certain financial services companies to incur large losses. Securities of financial services companies may experience a dramatic decline in value when such companies experience substantial declines in the valuations of their assets, take action to raise capital (such as the issuance of debt or equity securities), or cease operations. Credit losses resulting from financial difficulties of borrowers and financial losses associated with investment activities can negatively impact the sector. Insurance companies may be subject to major price competition. Adverse economic, business or political developments could adversely affect financial institutions engaged in mortgage finance or other lending or investing activities directly or indirectly connected to the value of real estate.

◦Industrial Sector Risk. Companies in the industrial sector may be adversely affected by changes in the supply and demand for products and services, product obsolescence or discontinuance, claims for environmental damage or product liability and changes in general economic conditions, among other factors. Government regulation, word events, exchange rates and economic conditions, technological developments and liabilities for environmental damage and general civil liabilities will also affect the performance of these companies. Aerospace and defense companies, a component of the industrial sector, can be significantly affected by government spending policies because companies involved in this industry rely (to a significant

extent) on U.S. and foreign government demand for their products and services. Therefore, the financial condition of, and investor interest in, aerospace and defense companies are heavily influenced by governmental defense spending policies, which are typically under pressure from efforts to control the U.S. and other government budgets. Transportation securities, a component of the industrial sector, are cyclical and have occasional sharp price movements which may result from changes in the economy, fuel prices, labor agreements and insurance costs.

Sector Risk, Financial Sector Risk Member

Prospectus [Line Items]

Risk [Text Block]

Financial Sector Risk. Financial services companies are subject to extensive governmental regulation, which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees that they can charge, the scope of their activities, the prices they can charge and the amount of capital that they must maintain. Profitability is largely dependent on the availability and cost of capital funds and can fluctuate significantly when interest rates change or due to increased competition. In addition, deterioration of the credit markets generally may adversely impact a broad range of markets, thereby affecting a wide range of financial institutions and markets. Certain events in the financial sector may cause an unusually high degree of volatility in the financial markets, both domestic and foreign, and cause certain financial services companies to incur large losses. Securities of financial services companies may experience a dramatic decline in value when such companies experience substantial declines in the valuations of their assets, take action to raise capital (such as the issuance of debt or equity securities), or cease operations. Credit losses resulting from financial difficulties of borrowers and financial losses associated with investment activities can negatively impact the sector. Insurance companies may be subject to major price competition. Adverse economic, business or political developments could adversely affect financial institutions engaged in mortgage finance or other lending or investing activities directly or indirectly connected to the value of real estate.

Sector Risk, Industrial Sector Risk Member

Prospectus [Line Items]

Risk [Text Block]

Industrial Sector Risk. Companies in the industrial sector may be adversely affected by changes in the supply and demand for products and services, product obsolescence or discontinuance, claims for environmental damage or product liability and changes in general economic conditions, among other factors. Government regulation, word events, exchange rates and economic conditions, technological developments and liabilities for environmental damage and general civil liabilities will also affect the performance of these companies. Aerospace and defense companies, a component of the industrial sector, can be significantly affected by government spending policies because companies involved in this industry rely (to a significant extent) on U.S. and foreign government demand for their products and services. Therefore, the financial condition of, and investor interest in, aerospace and defense companies are heavily influenced by governmental defense spending policies, which are typically under pressure from efforts to control the U.S. and other government budgets. Transportation securities, a component of the industrial sector, are cyclical and have occasional sharp price movements which may result from changes in the economy, fuel prices, labor agreements and insurance costs.

Securities Lending Risk Member

Prospectus [Line Items]

Risk [Text Block]

Securities Lending Risk. There are certain risks associated with securities lending, including the risk that the borrower may fail to return the securities on a timely basis or even the loss of rights in the collateral deposited by the borrower, if the borrower should fail financially. The Fund could also lose money in the event of a decline in the value of collateral provided for loaned securities or a decline in the value of any investments made with cash collateral. As a result the Fund may lose money.

Small-Capitalization Company Risk Member

Prospectus [Line Items]

Risk [Text Block]

Small-Capitalization Company Risk. Small-capitalization companies are subject to substantially greater risks of loss and price fluctuations because their earnings and revenues tend to be less predictable (and some companies may be experiencing significant losses). Their share prices tend to be more volatile and their markets less liquid than companies with larger market capitalizations. The shares of small-capitalization companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the future ability to sell these securities.

Tracking Error Risk Member

Prospectus [Line Items]

Risk [Text Block]

Tracking Error Risk. As with all index funds, the performance of the Fund and its 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.

Underlying Index Risk Member

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Risk [Text Block]

Underlying Index Risk. Neither the Adviser nor the Index Provider, the index provider and calculation agent for the Index, is able to guarantee the continuous availability or timeliness of the production of the Index. The calculation and dissemination of the Index values may be delayed if the information technology or other facilities of the Index Provider, data providers and/or relevant stock exchange malfunction for any reason. A significant delay may cause trading in shares of the Fund to be suspended. Errors in Index data, computation and/or the construction in accordance with its methodology may occur from time to time and may not be identified and corrected by the Index Provider or other applicable party for a period of time or at all, which may have an adverse impact on the Fund and its shareholders. Index providers generally do not provide any representation or warranty in relation to the quality, accuracy or completeness of data in the indexes in which they license, and generally do not guarantee that an index will be calculated in accordance with its stated methodology. Losses or costs associated with any index provider errors generally will be borne by the Fund and its shareholders.

Valuation Risk Member

Prospectus [Line Items]

Risk [Text Block]

Valuation Risk. The Fund may hold securities or other assets that may be valued on the basis of factors other than market quotations. This may occur because the asset or security does not trade on a centralized exchange, or in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” assets or securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time. The Adviser’s ability to value investments may be impacted by technological issues or errors by pricing services or other third-party service providers.

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.

Risk Nondiversified Status [Member]

Prospectus [Line Items]

Risk [Text Block]

Non-Diversification Risk. The Fund is considered to be non-diversified, which means it may invest a greater percentage of its assets in the securities of a single issuer or a lesser number of issuers than if it was 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 lesser number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively small number of issuers to have a greater impact on the Fund’s performance.