S000093501 [Member] Investment Risks - NT Short-Term Tax-Exempt Bond ETF |
Aug. 05, 2025 |
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| Risk [Text Block] | ALTERNATIVE MINIMUM TAX RISK is the risk that a portion of the Fund’s otherwise tax‑exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| MUNICIPAL MARKET VOLATILITY RISK [Member] | |||||||||
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| Risk [Text Block] | MUNICIPAL MARKET VOLATILITY RISK is the risk that the Fund may be adversely affected by volatility in the municipal market. The municipal market can be significantly affected by adverse tax, legislative, political or public health changes and the financial condition of the issuers of municipal securities.
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| MUNICIPAL TAX LIABILITY RISK [Member] | |||||||||
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| Risk [Text Block] | MUNICIPAL TAX LIABILITY RISK is the risk that shareholders of the Fund could be subject to tax liabilities. The Fund will invest in municipal securities in reliance at the time of purchase on an opinion of bond counsel to the issuer that the interest paid on those securities will be excludable from gross income for regular federal income tax purposes. Subsequent to the Fund’s acquisition of a municipal security, however, the municipal security may be determined to pay, or to have paid, taxable income. As a result, the treatment of dividends previously paid or to be paid by the Fund as exempt-interest dividends could be adversely affected, subjecting the Fund’s shareholders to increased federal income tax liabilities. Certain other investments made by the Fund, including its derivative holdings, may result in the receipt of taxable income or gains by the Fund.
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| INCOME RISK [Member] | |||||||||
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| Risk [Text Block] | INCOME RISK is the risk that the Fund’s income may decline when interest rates fall. This decline can occur because the Fund must invest in lower-yielding bonds as bonds in its portfolio mature, bonds in the Underlying Index are substituted or the Fund otherwise needs to purchase additional bonds.
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| CREDIT OR DEFAULT RISK [Member] | |||||||||
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| Risk [Text Block] | CREDIT (OR DEFAULT) RISK is the risk that the inability or unwillingness of an issuer or guarantor of a fixed-income security, or a counterparty to a repurchase or other transaction, to meet its principal or interest payments or other financial obligations in a timely manner will adversely affect the value of the Fund’s investments and its returns. Changes in an issuer’s financial strength, the market’s perception of an issuer’s creditworthiness, or in the credit rating of the issuer or the security may also affect the value of the Fund’s investment in that issuer.
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| DEBT EXTENSION RISK [Member] | |||||||||
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| Risk [Text Block] | DEBT EXTENSION RISK is the risk that when interest rates rise an issuer will exercise its right to pay principal on certain debt securities held by the Fund later than expected. This will cause the value of the security, and the Fund’s NAV, to decrease, and the Fund may lose opportunities to invest in higher yielding securities.
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| PREPAYMENT OR CALL RISK [Member] | |||||||||
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| Risk [Text Block] | PREPAYMENT (OR CALL) RISK is the risk that an issuer could exercise its right to pay principal on callable debt securities held by the Fund earlier than expected. Issuers may be more likely to prepay when interest rates fall, when credit spreads change, or when an issuer’s credit quality improves. If this happens, the Fund will not benefit from the rise in the market price of the securities that normally accompanies a decline in interest rates and will be forced to reinvest prepayment proceeds in lower yielding securities, which may reduce the Fund’s returns. The Fund may also lose any premium it paid to purchase the securities.
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| MARKET RISK [Member] | |||||||||
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| Risk [Text Block] | MARKET RISK is the risk that the value of the Fund’s investments may increase or decrease in response to expected, real or perceived economic, political or financial events in the U.S. or global markets. The frequency and magnitude of such changes in value cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in response to changing market conditions, inflation, changes in interest rates, lack of liquidity in the bond or equity markets or volatility in the equity markets. Market disruptions caused by local or regional events such as financial institution failures, war, acts of terrorism, the spread of infectious illness (including epidemics and pandemics) or other public health issues, recessions or other events or adverse investor sentiment could have a significant impact on the Fund and its investments. During periods of market disruption or other abnormal market conditions, the Fund’s exposure to risks described elsewhere in this summary will likely increase.
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| INTEREST RATE RISKS [Member] | |||||||||
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| Risk [Text Block] | INTEREST RATE RISK is the risk that during periods of rising interest rates, the market value of a Fund’s securities will tend to be lower than prevailing market rates and in periods of falling interest rates, the market value of a Fund’s securities will tend to be higher. The Fund’s yield will vary as short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. In general, securities with longer maturities or durations are more sensitive to interest rate changes. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions for the Fund. During periods when inflation rates are high or rising, or during periods of low interest rates, the Fund may be subject to a greater risk of rising interest rates. Changing interest rates may have unpredictable effects on the markets and the Fund’s investments, may result in heightened market volatility, may impact the liquidity of fixed-income securities and of the Fund, and may detract from Fund performance.
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| INDEX RISK [Member] | |||||||||
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| Risk [Text Block] | INDEX RISK is the risk that the Fund would not necessarily buy or sell a security unless that security is added to or removed from, respectively, the Underlying Index, even if that security generally is underperforming, because unlike many investment companies, the Fund does not utilize an investing strategy that seeks returns in excess of the Underlying Index. Additionally, the Fund rebalances and/or reconstitutes its portfolio in accordance with the Underlying Index, and, therefore, any changes to the Underlying Index’s rebalance and/or reconstitution schedule will result in corresponding changes to the Fund’s rebalance and/or reconstitution schedule.
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| TRACKING ERROR RISK [Member] | |||||||||
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| Risk [Text Block] | TRACKING ERROR RISK is the risk that the Fund’s performance may vary from the performance of the Underlying Index as a result of creation and redemption activity, transaction costs, expenses and other factors. Market disruptions, regulatory restrictions or other abnormal market conditions could have an adverse effect on the Fund’s ability to adjust its exposure to required levels in order to track its Underlying Index or cause delays in the Underlying Index’s rebalancing and/or reconstitution schedule. During any such delay, it is possible that the Underlying Index, and, in turn, the Fund will deviate from the Underlying Index’s stated methodology and therefore experience returns different than those that would have been achieved under a normal rebalancing or reconstitution schedule.
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| SAMPLING RISK [Member] | |||||||||
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| Risk [Text Block] | SAMPLING RISK is the risk that the Fund’s use of a representative sampling approach may result in increased tracking error because the securities selected for the Fund in the aggregate may vary from the investment profile of the Underlying Index. Additionally, the use of a representative sampling approach may result in the Fund holding a smaller number of securities than the Underlying Index, and, as a result, an adverse development to an issuer of securities that the Fund holds could result in a greater decline in NAV than would be the case if the Fund held all of the securities in the Underlying Index.
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| AUTHORIZED PARTICIPANT CONCENTRATION RISK [Member] | |||||||||
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| Risk [Text Block] | AUTHORIZED PARTICIPANT CONCENTRATION RISK is the risk that the Fund may be adversely affected because it has a limited number of institutions that act as authorized participants (“Authorized Participants”). Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund and none of those Authorized Participants is obligated to engage in creation and/or redemption transactions. To the extent that these institutions exit the business or are unable or unwilling to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able or willing to step forward to create or redeem Creation Units (as defined below), Fund shares may trade at a discount to NAV and possibly face trading halts and/or delisting.
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| CALCULATION METHODOLOGY RISK [Member] | |||||||||
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| Risk [Text Block] | CALCULATION METHODOLOGY RISK is the risk that the Underlying Index’s calculation methodology or sources of information may not provide an accurate assessment of included issuers or correct valuation of securities, nor is the availability or timeliness of the production of the Underlying Index guaranteed. A security included in the Underlying Index may not exhibit the characteristic or provide the specific exposure for which it was selected and consequently a Fund’s holdings may not exhibit returns consistent with that characteristic or exposure.
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| MARKET TRADING RISK [Member] | |||||||||
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| Risk [Text Block] | MARKET TRADING RISK is the risk that the Fund faces because its shares are listed on a securities exchange, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, periods of high volatility and disruption in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of its listing exchange, make trading in the shares inadvisable. The market prices of Fund shares will generally fluctuate in accordance with changes in its NAV, changes in the relative supply of, and demand for, Fund shares, and changes in the liquidity, or the perceived liquidity, of the Fund’s holdings.
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| CONCENTRATION RISK [Member] | |||||||||
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| Risk [Text Block] | CONCENTRATION RISK is the risk that, if the Fund is concentrated in a particular industry or group of industries, the Fund is likely to present more risks than a fund that is broadly diversified over several industries or groups of industries. Compared to the broad market, an individual industry may be more strongly affected by changes in the economic climate, broad market shifts, moves in a particular dominant stock or regulatory changes.
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| LIQUIDITY RISK [Member] | |||||||||
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| Risk [Text Block] | LIQUIDITY RISK is the risk that certain securities may be less liquid than others, which may make them difficult or impossible to sell at the time and the price that the Fund would like, and the Fund may have to lower the price, sell other securities instead or forgo an investment opportunity, adversely affecting the value of the Fund’s investments and its returns. In addition, less liquid securities may be more difficult to value, and markets may become less liquid when there are fewer interested buyers or sellers or when dealers are unwilling or unable to make a market for certain securities, and if the Fund is forced to sell these investments to meet redemption requests or for other cash needs, the Fund may suffer a loss. Banking regulations may also cause certain dealers to reduce their inventories of certain securities, which may further decrease the Fund’s ability to buy or sell such securities. All of these risks may increase during periods of market turmoil and could have a negative effect on the Fund’s performance.
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| VALUATION RISK [Member] | |||||||||
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| Risk [Text Block] | VALUATION RISK is the risk that the purchase or sale price the Fund could receive for a portfolio security may differ from the Fund’s valuation of the security, particularly for securities that trade in low volume or volatile markets or that are valued using a fair value methodology. In addition, 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.
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| SMALL FUND RISK [Member] | |||||||||
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| Risk [Text Block] | SMALL FUND RISK is the risk that the Fund will not grow to or maintain an economically viable size, in which case it may experience greater tracking error to its Underlying Index than it otherwise would at higher asset levels, or it could ultimately liquidate without shareholder approval. In addition, investors in the Fund also bear the risk that, without sufficient assets, the Fund may not be successful in implementing its investment strategy or transacting in securities at the desired prices or on desirable terms. The timing of such liquidation may not be favorable and could have negative tax consequences for shareholders. From time to time, an Authorized Participant, a third-party investor, the Fund’s adviser or an affiliate of the Fund’s adviser, may invest in the Fund and hold its investment for a specific period of time in order to facilitate commencement of the Fund’s operations or for the Fund to achieve size or scale. There can be no assurance that any such entity would not redeem its investment or that the size of the Fund would be maintained at such levels, which could negatively impact the Fund. The Fund’s distributor does not maintain a secondary market in the shares.
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| DERIVATIVES RISKS [Member] | |||||||||
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| Risk [Text Block] | DERIVATIVES RISK is the risk that derivatives may pose risks in addition to and greater than those associated with investing directly in securities, currencies and other instruments, may be illiquid or less liquid, more volatile, more difficult to value and leveraged so that small changes in the value of the underlying instrument may produce disproportionate losses to the Fund. Derivatives are also subject to counterparty risk, which is the risk that the other party to the transaction will not perform its contractual obligations. The use of derivatives is a highly specialized activity that involves investment techniques and risks different from those associated with investments in more traditional securities and instruments.
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| MUNICIPAL INVESTMENTS RISK [Member] | |||||||||
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| Risk [Text Block] | MUNICIPAL INVESTMENTS RISK is the risk that the value of a municipal security generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect a municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security. The Fund may be more sensitive to adverse economic, business, political or public health developments if it focuses its assets in municipal bonds that are issued to finance similar projects (such as those relating to education, health care, housing, transportation, and utilities), industrial development bonds, in particular types of municipal securities (such as general obligation bonds, private activity bonds and moral obligation bonds), or in municipal securities of a particular state or territory. While income earned on municipal securities is generally not subject to federal tax, the failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities. The secondary market for municipal obligations also tends to be less well-developed and less liquid than many other securities markets, which may limit the Fund’s ability to sell its municipal obligations at attractive prices. Further, inventories of municipal securities held by brokers and dealers have decreased in recent years, lessening their ability to make a market in these securities, which has resulted in increased municipal security price volatility and trading costs, particularly during periods of economic or market stress.
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| Risk Lose Money [Member] | |||||||||
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| Risk [Text Block] | As with any fund, it is possible to lose money on an investment in the Fund. | ||||||||
| Risk Not Insured Depository Institution [Member] | |||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation, any other government agency, or The Northern Trust Company, its affiliates, subsidiaries or any other bank. | ||||||||
| Risk Nondiversified Status [Member] | |||||||||
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| Risk [Text Block] | NON‑DIVERSIFICATION RISK A non‑diversified fund may invest a larger portion of its assets in securities issued by or representing a smaller number of issuers than a diversified fund. As a result, a Fund may be more susceptible to the risks associated with these particular issuers, or to a single economic, political or regulatory occurrence affecting these issuers.
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