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IQ MacKay California Municipal Intermediate ETF  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading IQ MacKay California Municipal Intermediate ETF
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The IQ MacKay California Municipal Intermediate ETF (the “Fund”) seeks current income exempt from federal and California income taxes.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example set forth below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment): ​ ​ ​ ​ None
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rates was 98% of the average value of its portfolio. This rate excludes the value of the portfolio securities received or delivered as a result of in-kind creations or redemptions of the Shares.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 98.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Total Annual Fund Operating Expenses may not correlate to the ratio of expenses to average net assets as reported in the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees & Expenses.
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell all of your Shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain at current levels. The return of 5% and estimated expenses are for illustration purposes only, and should not be considered indicators of expected Fund expenses or performance, which may be greater or less than the estimates. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund, under normal circumstances, invests at least 80% of its assets (net assets plus any borrowings for investment purposes) in municipal bonds, whose interest is, in the opinion of bond counsel for the issuers at the time of issuance, exempt from federal and California income taxes. Municipal bonds are generally debt obligations issued by or on behalf of states, territories and possessions of the United States, and their political subdivisions, agencies and instrumentalities that provide income free from federal, state and potentially local
income taxes. If the interest on a particular municipal bond is exempt from federal and California income taxes, the Fund will treat the bond as qualifying for purposes of the 80% policy even though the issuer of the bond may be located outside of California.
Although the Fund may invest in municipal bonds rated in any rating category or in unrated municipal bonds, MacKay Shields LLC (the “Subadvisor”) intends to invest primarily in investment grade quality bonds as rated by at least one nationally recognized statistical rating organization (“NRSRO”), or, if unrated, judged to be of comparable quality by the Subadvisor. The Fund may invest up to 20% of its net assets in municipal bonds that are rated below investment grade as rated by an NRSRO, (such securities rated lower than BBB- and Baa3), or, if unrated, judged to be of comparable quality by the Subadvisor. Securities that are rated below investment grade by NRSROs are commonly referred to as “high-yield securities” or “junk bonds.” If NRSROs assign different ratings to the same security, the Fund will use the higher rating for purposes of determining the security’s credit quality. The Fund generally will maintain a portfolio modified duration to worst of 3 to 8 years. Duration to worst is the duration of a bond computed using the bond’s nearest call date or maturity, whichever comes first. This measure ignores future cash flow fluctuations due to embedded optionality. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates. The longer a security’s duration, the more sensitive it will be to changes in interest rates.
Municipal bonds include, among other instruments, general obligation bonds, revenue bonds, industrial revenue bonds, industrial development bonds, private activity bonds, as well as short-term, tax-exempt obligations such as municipal notes and variable rate demand obligations. The Fund may invest up to 20% of its net assets in municipal bonds subject to the federal alternative minimum tax and municipal bonds that pay interest that is subject to federal and/or California income taxes. The Fund may invest more than 25% of its total assets in municipal bonds that are related in such a way that an economic, business or political development or change affecting one such security could also affect the other securities.
If the supply of California state tax-exempt municipal bonds is insufficient to meet the Fund’s investment needs, the Fund may invest in municipal bonds issued by other states. Municipal bonds issued by other states purchased by the Fund will generally be exempt from federal income taxes but may not be exempt from California income taxes.
In choosing investments, the Subadvisor analyzes the credit quality of issuers and considers the yields available on municipal bonds with different maturities.
The Subadvisor uses active management in an effort to identify municipal bonds it believes to be mispriced and to build a consistent yield advantage. The Subadvisor focuses on reducing volatility through a disciplined investment process, which includes fundamental, “bottom-up” credit research and risk management. In addition, the Subadvisor reviews macroeconomic events, technical in the municipal market, tax policies and analyzes individual municipal securities and sectors. The Subadvisor’s investment process includes a risk analysis that gives consideration to a variety of security-specific risks, including but not limited to, environmental, social and governance (“ESG”) risks that may have a material impact on the performance of a security. In addition to proprietary research, the Subadvisor may use screening tools and, to the extent available, third-party data to identify ESG risk factors that may not have been captured through its own research. The Subadvisor’s consideration of ESG risk is weighed against other criteria and therefore does not mean that any sectors, industries or individual securities are explicitly excluded from the Fund.
The Subadvisor may sell a security if it no longer believes the security will contribute to meeting the investment objective of the Fund. In considering whether to sell a security, the Subadvisor may evaluate, among other things, the condition of the economy and meaningful changes in the issuer’s financial condition.
Risk [Heading] rr_RiskHeading Principal Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns
compare with its benchmark over time. The table that follows the bar chart shows the Fund’s average annual total return, both before and after taxes. The Bloomberg California Intermediate Municipal Bond Index is a market value-weighted index of California investment grade tax exempt fixed-rate municipal bonds with maturities of one year or more.
All returns assume reinvestment of dividends and distributions. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Performance reflects fee waivers and/or expense reimbursement in effect, if such waivers or reimbursements were not in place, the Fund’s performance would be reduced. Fund performance current to the most recent month-end is available by calling 1-888-474-7725 or by visiting newyorklifeinvestments.com/etf.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns compare with its benchmark over time.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-888-474-7725
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress newyorklifeinvestments.com/etf
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
The Fund’s year-to-date total return as of June 30, 2023 was 2.00%.
Best and Worst Quarter Returns (for the period reflected in the bar chart above)
​ ​ ​
Return
​ ​
Quarter/Year
​
Highest Return ​ ​ ​ ​ 3.77% ​ ​ ​ ​ ​ 4Q/2022 ​ ​
Lowest Return ​ ​ ​ ​ -7.79% ​ ​ ​ ​ ​ 1Q/2022 ​ ​
Year to Date Return, Label rr_YearToDateReturnLabel The Fund’s year-to-date total return as of June 30, 2023 was
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2023
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 2.00%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2022
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.77%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2022
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (7.79%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on your tax situation and may differ from those shown and are not relevant if you hold your Shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund Shares at the end of the measurement period.
Average Annual Return, Caption rr_AverageAnnualReturnCaption Average Annual Total Returns as of December 31, 2022
IQ MacKay California Municipal Intermediate ETF | Risk Not Insured [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
IQ MacKay California Municipal Intermediate ETF | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock The Shares will change in value and you could lose money by investing in the Fund.
IQ MacKay California Municipal Intermediate ETF | Alternative Minimum Tax Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Alternative Minimum Tax Risk Although the interest received from municipal securities is generally exempt from federal income tax, the Fund may invest in municipal securities subject to the federal alternative minimum tax. Accordingly, an investment in the Fund could cause shareholders to be subject to the federal alternative minimum tax.
IQ MacKay California Municipal Intermediate ETF | Authorized Participant Concentration Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Authorized Participant Concentration Risk Only certain large institutions may engage in creation or redemption transactions directly with the Fund (each, an “Authorized Participant”). The Fund has a limited number of institutions that may act as Authorized Participants on an agency basis (i.e., on behalf of other market participants). To the extent that those Authorized Participants exit the business or are unable to proceed with creation and/or redemption orders with the Fund and no other Authorized Participant is able to step forward to engage in creation and redemption transactions with the Fund, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting.
IQ MacKay California Municipal Intermediate ETF | California State Specific Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock California State Specific Risk Because the Fund invests principally in municipal bonds issued by, or on behalf of, the State of California, and its political subdivisions, agencies and instrumentalities, events in California may affect the value of the Fund’s investments and performance. These events may include fiscal or political policy changes, tax base erosion, budget deficits and other financial difficulties. Any deterioration of California’s fiscal situation and economic situation of its municipalities could cause greater volatility and increase the risk of investing in California.
IQ MacKay California Municipal Intermediate ETF | Cash Transactions Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Cash Transactions Risk The Fund currently intends to effect creations and redemptions principally for cash, rather than for in-kind securities. For this reason, the Fund may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. The Fund may recognize a capital gain on these sales that might not have been incurred if the Fund had made a redemption in-kind. This may decrease the tax efficiency of the Fund compared to ETFs that utilize an in-kind redemption process.
IQ MacKay California Municipal Intermediate ETF | Credit Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Credit Risk Credit risk is the risk that the issuer or guarantor of a debt instrument or the counterparty to a derivatives contract, repurchase agreement or loan of portfolio securities will be unable or unwilling to make its timely interest and/or principal payments when due or otherwise honor its obligations. Changes in an issuer’s or counterparty’s credit rating or the market’s perception of an issuer’s or counterparty’s creditworthiness may also adversely affect the value of the Fund’s investment in that issuer. The degree of credit risk depends on an issuer’s or counterparty’s financial condition and on the terms of an obligation.
IQ MacKay California Municipal Intermediate ETF | Cyber Security Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Cyber Security Risk The Fund is susceptible to operational risks through breaches in cyber security. Such events may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity and could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. In addition, cyber security breaches of the securities issuers or the Fund’s third-party service providers can also subject the Fund to many of the same risks associated with direct cyber security breaches. Although the Fund has established risk management systems designed to reduce the risks associated with cyber security, there is no guarantee that such efforts will succeed.
IQ MacKay California Municipal Intermediate ETF | Debt Securities Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Debt Securities Risk The risks of investing in debt securities include (without limitation): (i) credit risk, e.g., the issuer or guarantor of a debt security may be unable or unwilling (or be perceived as unable or unwilling) to make timely principal and/or interest payments or otherwise honor its obligations; (ii) interest rate risk, e.g., when interest rates go up, the value of a debt security generally goes down, and when interest rates go down, the value of a debt security generally goes up; (iii) liquidity risk and valuation risk, e.g., debt securities generally do not trade on a securities exchange, making them generally less liquid and more difficult to value than common stock; (iv) call risk and income risk, e.g., during a period of falling interest rates, the issuer may redeem a security by repaying it early, which may reduce the Fund’s income if the proceeds are reinvested at lower interest rates; and (v) extension risk, e.g., if interest rates rise, repayments of debt securities may occur more slowly than anticipated by the market, which may drive the prices of these securities down because their interest rates are lower than the current interest rate and the securities remain outstanding longer. Debt securities most frequently trade in institutional round lot size transactions. If the Fund purchases bonds in amounts less than the institutional round lot size, which are frequently referred to as “odd” lots, the odd lot size positions may have more price volatility than institutional round lot size positions. The Fund uses a third-party pricing service to value bond holdings and the pricing service values bonds assuming orderly transactions of an institutional round lot size.
IQ MacKay California Municipal Intermediate ETF | Focused Investment Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Focused Investment Risk To the extent that the Fund invests a large percentage of its assets in a single asset class or the securities of issuers within the same country, group of countries, region, industry, group of industries or sector, an adverse economic, market, political or regulatory development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. Different asset classes, countries, groups of countries, regions, industries, groups of industries or sectors tend to go through cycles of outperformance and underperformance in comparison to each other and to the general financial markets.
IQ MacKay California Municipal Intermediate ETF | High-Yield Municipal Bond Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock High-Yield Municipal Bond Risk High-yield or non-investment grade municipal bonds (commonly referred to as “junk bonds”) may be subject to increased liquidity risk as compared to other high-yield debt securities. There may be little or no active trading market for certain high-yield municipal bonds, which may make it difficult for the Fund to sell such bonds at or near their perceived value. In such cases, the value of a high-yield municipal bond may decline dramatically, even during periods of declining interest rates. The high-yield municipal bonds in which the Fund intends to invest may be more likely to pay interest that is includable in taxable income for purposes of the federal alternative minimum tax than other municipal bonds.
IQ MacKay California Municipal Intermediate ETF | Income Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Income Risk The Fund’s income may decline when interest rates fall or if there are defaults in its portfolio. This decline can occur because the Fund may subsequently invest in lower-yielding securities when securities in its portfolio mature or the Fund otherwise needs to purchase additional securities.
IQ MacKay California Municipal Intermediate ETF | Interest Rate Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Interest Rate Risk An increase in interest rates may cause the value of securities held by the Fund to decline. Fixed income securities with longer durations tend to be more sensitive to changes in interest rates, making them more volatile than securities with shorter durations or floating or adjustable interest rates. The negative impact on the Fund from potential interest rate increases could be swift and significant, including falling market values, increased redemptions and reduced liquidity. The Fund may be subject to a greater risk of rising interest rates during periods of low interest rates. When interest rates rise, certain obligations will be paid off by the issuer (or other obligated party) more slowly than anticipated, causing the value of these securities to fall. As a result, in a period of rising interest rates, securities may exhibit additional volatility and may lose value. The value of securities with longer maturities generally changes more in response to changes in interest rates than does the value of securities with shorter maturities. During periods of falling interest rates, an issuer of a callable security held by the Fund may “call” or repay the security before its stated maturity, which may result in the Fund having to reinvest the proceeds in securities with lower yields, resulting in a decline in the Fund’s income, or in securities with greater risks or with other less favorable features.
IQ MacKay California Municipal Intermediate ETF | Issuer Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Issuer Risk The performance of the Fund depends on the performance of individual securities to which the Fund has exposure. Changes to the financial condition or credit rating of an issuer of those securities may cause the value of the securities to decline.
IQ MacKay California Municipal Intermediate ETF | Liquidity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Liquidity Risk Liquidity risk exists when particular investments are difficult to purchase or sell. Certain investments may be subject to restrictions on resale, trade over-the-counter or in limited volume, or lack an active trading market. Accordingly, the Fund may not be able to sell or close out of such investments at favorable times or prices (or at all), or at the prices approximating those at which the Fund currently values them. Illiquid securities may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value.
IQ MacKay California Municipal Intermediate ETF | Market Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Market Risk Market risks include political, regulatory, market and economic developments, including developments that impact specific economic sectors, industries or segments of the market, which may affect the Fund’s value. Turbulence in financial markets, tariffs and other protectionist measures, political developments and uncertainty, central bank policy, and reduced liquidity in equity, credit and fixed income markets may negatively affect many issuers worldwide, which could have an adverse effect on the Fund. During a general downturn in the securities markets, multiple asset classes may be negatively affected. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, public health crises and related geopolitical events have led, and in the future may lead, to disruptions in the U.S. and world economies and markets, which may increase financial market volatility and have significant adverse direct or indirect effects on the Fund and its investments. Market disruptions could cause the Fund to lose money, experience significant redemptions, and encounter operational difficulties. Although multiple asset classes may be affected by a market disruption, the duration and effects may not be the same for all types of assets.
IQ MacKay California Municipal Intermediate ETF | Money Market/Short-Term Securities Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Money Market/Short-Term Securities Risk To the extent the Fund holds cash or invests in money market or short-term securities, the Fund may be less likely to achieve its investment objective. In addition, it is possible that the Fund’s investments in these instruments could lose money.
IQ MacKay California Municipal Intermediate ETF | Municipal Bond Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Municipal Bond Risk Issuers, including governmental issuers, may be unable to pay their obligations as they come due. The values of municipal bonds that depend on a specific revenue source to fund their payment obligations may fluctuate as a result of actual or anticipated changes in the cash flows generated by the revenue source or changes in the priority of the municipal obligation to receive the cash flows generated by the revenue source. The values of municipal bonds held by the Fund may be adversely affected by local political and economic conditions and developments. Adverse conditions in an industry significant to a local economy could have a correspondingly adverse effect on the financial condition of local issuers. This risk would be heightened to the extent that the Fund invests a substantial portion of its assets in municipal bonds issued pursuant to similar projects or whose interest is paid solely from revenues of similar projects. In addition, income from municipal bonds held by the Fund could be declared taxable because of, among other things, unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or state tax authorities, or noncompliant conduct of an issuer or other obligated party. Loss of tax-exempt status may cause interest received and distributed to shareholders by the Fund to be taxable and may result in a significant decline in the values of such municipal securities. There are various different types of municipal bonds, each with its own unique risk profile. Some of these risks include:
IQ MacKay California Municipal Intermediate ETF | General Obligation Bonds Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock General Obligation Bonds Risk — timely payments depend on the issuer’s credit quality, ability to raise tax revenues and ability to maintain an adequate tax base;
IQ MacKay California Municipal Intermediate ETF | Revenue Bonds (including Industrial Development Bonds) Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Revenue Bonds (including Industrial Development Bonds) Risk — timely payments depend on the money earned by the particular facility or class of facilities, or the amount of revenues derived from another source, and may be negatively impacted by the general credit of the user of the facility;
IQ MacKay California Municipal Intermediate ETF | Private Activity Bonds Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Private Activity Bonds Risk — municipalities and other public authorities issue private activity bonds to finance development of industrial facilities for use by a private enterprise, which is solely responsible for paying the principal and interest on the bonds, and payment under these bonds depends on the private enterprise’s ability to do so;
IQ MacKay California Municipal Intermediate ETF | Moral Obligation Bonds Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Moral Obligation Bonds Risk — moral obligation bonds are generally issued by special purpose public authorities of a state or municipality. If the issuer is unable to meet its obligations, repayment of these bonds becomes a moral commitment, but not a legal obligation, of the state or municipality;
IQ MacKay California Municipal Intermediate ETF | Municipal Notes Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Municipal Notes Risk — municipal notes are shorter-term municipal debt obligations that pay interest that is, in the opinion of bond counsel for the issuer at the time of issuance, generally excludable from gross income for federal income tax purposes (except that the interest may be includable in taxable income for purposes of the federal alternative minimum tax) and that have a maturity that is generally one year or less. If there is a shortfall in the anticipated proceeds, the notes may not be fully repaid and the Fund may lose money; and
IQ MacKay California Municipal Intermediate ETF | Municipal Lease Obligations Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Municipal Lease Obligations Risk — in a municipal lease obligation, the issuer agrees to make payments when due on the lease obligation. Although the issuer does not pledge its unlimited taxing power for payment of the lease obligation, the lease obligation is secured by the leased property.
IQ MacKay California Municipal Intermediate ETF | Municipal Bond Market Liquidity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Municipal Bond Market Liquidity Risk Inventories of municipal bonds held by brokers and dealers may decrease, lessening their ability to make a market in these securities. Any reduction in market-making capacity has the potential to decrease the Fund’s ability to buy or sell municipal bonds and increase price volatility and trading costs, particularly during periods of economic or market stress. As a result, the Fund may be forced to accept a lower price to sell a municipal bond, to sell other securities to raise cash, or to give up an investment opportunity, any of which could have a negative effect on performance.
IQ MacKay California Municipal Intermediate ETF | Municipal Insurance Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Municipal Insurance Risk The Fund’s investments may include investments in insured municipal bonds. Municipal security insurance does not guarantee the value either of individual municipal securities or of Shares of the Fund. In addition, a municipal security insurance policy generally will not cover: (i) repayment of a municipal security before maturity (redemption), (ii) prepayment or payment of an acceleration premium (except for a mandatory sinking fund redemption) or any other provision of a bond indenture that advances the maturity of the bond or (iii) non-payment of principal or interest caused by negligence or bankruptcy of the paying agent. A mandatory sinking fund redemption may be a provision of a municipal security issue whereby part of the municipal security issue may be retired before maturity. Market conditions or changes to ratings criteria could adversely impact the ratings of municipal bond insurance companies. Downgrades and withdrawal of ratings from municipal bond insurers have substantially limited the availability of insurance sought by municipal bond issuers, thereby reducing the supply of insured municipal bonds that meet the Fund’s investment guidelines or the ability of the Fund to purchase insurance on municipal bonds held by the Fund. A rating downgrade of a municipal bond insurer could negatively impact the market value of insured municipal bonds held by the Fund. If the insurer of a defaulted municipal bond were to become unable or unwilling to pay the principal or interest on the defaulted municipal bond, the Fund would incur losses.
IQ MacKay California Municipal Intermediate ETF | Operational Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Operational Risk The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and Advisor seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address significant operational risks.
IQ MacKay California Municipal Intermediate ETF | Portfolio Management Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Portfolio Management Risk The Fund is subject to portfolio management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result or, while it may be the desired result, may underperform other types of investment strategies. The Subadvisor may give consideration to certain ESG criteria when evaluating an investment opportunity. The application of ESG criteria may result in the Fund (i) having exposure to certain securities or industry sectors that are significantly different than the composition of the Fund’s benchmark; and (ii) performing differently than other funds and strategies in its peer group that do not take into account ESG criteria or the Fund’s benchmark. There can be no guarantee that the Fund will meet its investment objective(s).
IQ MacKay California Municipal Intermediate ETF | Portfolio Turnover Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Portfolio Turnover Risk The Fund’s strategy may frequently involve buying and selling portfolio securities to rebalance the Fund’s investment exposures. High portfolio turnover may result in the Fund paying higher levels of transaction costs and generating greater tax liabilities for shareholders. Portfolio turnover risk may cause a Fund’s performance to be less than expected.
IQ MacKay California Municipal Intermediate ETF | Private Placement and Restricted Securities Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Private Placement and Restricted Securities Risk The Fund may invest in privately issued securities, including those which may be resold only in accordance with Rule 144A under the Securities Act of 1933, as amended. Securities acquired in a private placement generally are subject to strict restrictions on resale, and there may be no market or a limited market for the resale of such securities. Therefore, the Fund may be unable to dispose of such securities when it desires to do so or at the most favorable price. This potential lack of liquidity also may make it more difficult to accurately value these securities.
IQ MacKay California Municipal Intermediate ETF | Secondary Market Trading Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Secondary Market Trading Risk Although the Fund’s Shares are listed for trading on one or more securities exchanges, there can be no assurance that an active trading market for such Shares will develop or be maintained by market makers or Authorized Participants. The trading of Shares on securities exchanges is subject to the risk of irregular trading activity. Securities exchanges have requirements that must be met in order for Shares to be listed. There can be no assurance that the requirements of an exchange necessary to maintain the listing of Shares will continue to be met. This risk is particularly acute for funds that fail to attract a large number of shareholders. Pursuant to an exchange’s “circuit breaker” rules, trading in the Fund’s Shares may be halted due to extraordinary market volatility. Additionally, market makers are under no obligation to make a market in the Fund’s Shares and Authorized Participants are not obligated to submit purchase or redemption orders for creation units. In the event market makers cease making a market in the Fund’s Shares or Authorized Participants stop submitting purchase or redemption orders for creation units, the Fund’s Shares may trade at a larger premium or discount to its NAV.
IQ MacKay California Municipal Intermediate ETF | Trading Price Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Trading Price Risk Although it is generally expected that the market price of the Fund’s Shares will approximate the Fund’s NAV, there may be times when the market price and the NAV vary significantly. Shares of the Fund trade on securities exchanges at prices at, above or below the Fund’s most recent NAV. The NAV of the Fund is calculated at the end of each business day and fluctuates with changes in the market value of the Fund’s holdings. The trading price of the Fund’s Shares fluctuates continuously throughout trading hours based on market supply of and demand for Shares and the Fund’s NAV, among other reasons. As a result, the trading prices of the Fund’s Shares may deviate significantly from NAV during periods of market volatility. The market price of the Fund’s Shares during the trading day, like the price of any exchange-traded security, includes a “bid/ask” spread charged by market makers or other participants that trade the Shares. In times of severe market disruption, the bid/ask spread can increase significantly. At those times, Shares are most likely to be traded at a discount to NAV, and the discount is likely to be greatest when the price of Shares is falling fastest, which may be the time that an investor most wants to sell their Shares. The risk of wide bid and ask spreads may be especially pronounced for smaller funds. In addition, increased market volatility may cause wider spreads.
IQ MacKay California Municipal Intermediate ETF | Valuation Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Valuation Risk When valuing the Fund’s portfolio investments, if a market quotation is readily available for a portfolio investment, that investment will generally be valued at the market value. However, unlike publicly traded securities that trade on national securities exchanges, there is no central place or exchange for trading most debt securities and thus readily available market quotations are unavailable. Debt securities generally trade on an “over-the-counter” market. Due to the lack of centralized information and trading, and variations in lot sizes of certain debt securities, the valuation of debt securities may carry more uncertainty and risk than that of publicly traded securities. Debt securities are commonly valued by third-party pricing service providers that utilize a range of market-based inputs and assumptions, including readily available market quotations obtained from broker-dealers making markets in such securities, cash flows and transactions for comparable instruments. However, because the available information is less reliable and more subjective, elements of judgment may play a greater role in valuation of debt securities than for other types of securities. Additionally, pricing service providers generally price debt securities assuming orderly transactions of an institutional “round lot” size, but some trades may occur in smaller, “odd lot” sizes, often at lower prices than institutional round lot trades. Valuing the Fund’s investments using fair value pricing provided by pricing service providers will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. It is possible that the fair value determined for a portfolio instrument may be materially different from the value that could be realized upon the sale of that instrument.
IQ MacKay California Municipal Intermediate ETF | Variable and Floating Rate Instruments Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Variable and Floating Rate Instruments Risk Variable and floating rate instruments include debt securities issued by corporate and governmental entities, bank loans, mortgage-backed securities and asset-backed securities, preferred equity securities and derivative variable rate securities, such as inverse floaters. Variable and floating rate instruments are structured so that the instrument’s coupon rate fluctuates based upon the level of a reference rate. A variable or floating rate instrument’s coupon rate resets periodically according to its terms. Consequently, in a rising interest rate environment, variable and floating rate instruments with coupon rates that reset infrequently may lag behind the changes in market interest rates.
IQ MacKay California Municipal Intermediate ETF | Bloomberg California Intermediate Municipal Bond Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.90%) [1]
Since Inception rr_AverageAnnualReturnSinceInception (5.52%) [1]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 21, 2021 [1]
IQ MacKay California Municipal Intermediate ETF | IQ MacKay California Municipal Intermediate ETF  
Risk/Return: rr_RiskReturnAbstract  
Shareholder Fees (fees paid directly from your investment): rr_ShareholderFeeOther none
Management Fee rr_ManagementFeesOverAssets 0.45%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.24%
Acquired Fund Fees and Expense rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.70%
Expense Waiver/Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.34% [3]
Total Annual Fund Operating Expenses After Expense Waiver/Reimbursement rr_NetExpensesOverAssets 0.36%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 37
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 116
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 202
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 456
Annual Return 2022 rr_AnnualReturn2022 (12.16%)
1 Year rr_AverageAnnualReturnYear01 (12.16%) [1]
Since Inception rr_AverageAnnualReturnSinceInception (11.77%) [1]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 21, 2021 [1]
IQ MacKay California Municipal Intermediate ETF | IQ MacKay California Municipal Intermediate ETF | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (12.16%) [1],[4]
Since Inception rr_AverageAnnualReturnSinceInception (11.78%) [1],[4]
IQ MacKay California Municipal Intermediate ETF | IQ MacKay California Municipal Intermediate ETF | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (6.18%) [1],[4]
Since Inception rr_AverageAnnualReturnSinceInception (8.37%) [1],[4]
[1] The Fund commenced operations on December 21, 2021.
[2] The Total Annual Fund Operating Expenses may not correlate to the ratio of expenses to average net assets as reported in the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees & Expenses. Acquired Fund Fees & Expenses represent the Fund’s pro rata share of fees and expenses incurred indirectly as a result of investing in other funds, including ETFs and money market funds.
[3] IndexIQ Advisors LLC (the “Advisor”) has contractually agreed to waive or reduce its management fee and/or reimburse expenses of the Fund in an amount that limits “Total Annual Fund Operating Expenses” ​(exclusive of interest, taxes, brokerage fees and commissions, dividends paid on short sales, acquired fund fees and expenses, and extraordinary expenses) to not more than 0.35% of the average daily net assets of the Fund. The agreement will remain in effect permanently unless terminated by the Board of Trustees of the Fund.
[4] After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown and are not relevant if you hold your Shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund Shares at the end of the measurement period.