v3.25.0.1
Label Element Value
The Short Term Government Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading The Short-Term Government Fund – Summary
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Fund is to seek current income with preservation of principal.
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. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and the Example below. There is no sales charge imposed on purchases of shares.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination March 1, 2026
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 Fund 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 rate was 18% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 18.00%
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 this Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in shares of the Fund for the time periods indicated and then redeem 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 equal to the Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement in the first year and the Total Annual Fund Operating Expenses thereafter. 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
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Security Types: Under normal market conditions, the Fund invests at least 80% of its net assets plus any borrowings for investment purposes (measured at the time of purchase) in securities issued or guaranteed by the U.S. Government, its agencies or instrumentalities (including U.S. Treasury bills, notes, bonds and inflation-protected obligations) and government mortgage-backed securities (pools of mortgage loans sold to investors by various governmental agencies). The Fund may also purchase other mortgage-backed and asset-backed securities, which are sold by private issuers. The Fund will provide shareholders with at least 60 days’ notice before changing its 80% investment policy.
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Credit Quality: The Fund invests primarily in securities rated investment grade (AAA, AA, A, BBB or an equivalent rating) by one of the major credit rating agencies (S&P Global Ratings, Moody’s and Fitch) that has assigned a rating to the security or, if unrated, deemed to be investment-grade quality by the Adviser.
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Maturity Distribution: The Fund emphasizes purchasing short-term bonds. The Fund invests at least 65% of its total assets in securities issued or guaranteed by the U.S. Government, its agencies or instrumentalities and government mortgage-backed securities that have average lives or remaining maturities of five years or less.
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The Fund actively manages maturities to take advantage of changes in interest rates. The dollar-weighted average maturity of the Fund’s investments will not exceed three years.
Risk [Heading] rr_RiskHeading Principal Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Fund Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and table below provide an indication of the risks of investing in the Fund by showing: (a) changes in the performance of the Fund’s shares from year to year; and (b) how the average annual total returns of the Fund’s shares compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. To obtain updated performance information, please visit the Fund’s website at www.commercefunds.com or by calling 1-800-995-6365.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide an indication of the risks of investing in the Fund by showing: (a) changes in the performance of the Fund’s shares from year to year; and (b) how the average annual total returns of the Fund’s shares compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The Bloomberg U.S. 1-5 Year Government Bond Index measures the performance of U.S. dollar-denominated U.S. Treasury bonds, government related bonds (i.e., U.S. and non-U.S. agencies, sovereign, quasi-sovereign, supranational and local authority debt) and investment grade U.S. corporate bonds that have a remaining maturity of greater than or equal to one year and less than five years.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-995-6365
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.commercefunds.com
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 [Heading] rr_BarChartHeading Year-by-Year Total Returns as of 12/31 Each Year TOTAL RETURNCALENDAR YEAR
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Best Quarter* Q4 ‘23 3.06% Worst Quarter* Q1 ‘22 –3.11% * Please note that “Best Quarter” and “Worst Quarter” figures are applicable only to the time period covered by the bar chart.
Performance Table Heading rr_PerformanceTableHeading Average Annual Total ReturnsFor the periods endedDecember 31, 2024
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged In connection with a new regulatory requirement, effective October 31, 2024, the Fund changed its broad based index to the Bloomberg US Aggregate Bond Index.
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes The Index figures do not reflect any deduction for fees, taxes or expenses.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns below are calculated using the historical highest 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 an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold Fund shares through tax-advantaged arrangements such as a 401(k) plan or individual retirement account (IRA).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns below are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold Fund shares through tax-advantaged arrangements such as a 401(k) plan or individual retirement account (IRA).
The Short Term Government Fund | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock As with any mutual fund, it is possible to lose money onan investment in the Fund.
The Short Term Government Fund | Risk Not Insured Depository Institution [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock An investment in the Fund is not a bank deposit and is notinsured or guaranteed by the Federal Deposit Insurance Corporation or any governmentagency.
The Short Term Government Fund | Market Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Market Risk: 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, 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.
The Short Term Government Fund | Investment Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Investment Risk: The value of your investment in this Fund may fluctuate, which means that you could lose money.
The Short Term Government Fund | Management Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Management Risk: A strategy used by the Adviser could fail to produce the intended results.
The Short Term Government Fund | Large Shareholder Purchase and Redemption Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Large Shareholder Purchase and Redemption Risk: The Fund may experience adverse effects when certain large shareholders purchase or redeem large amounts of shares of the Fund. Such large shareholder redemptions may cause the Fund to sell its securities at times when it would not otherwise do so, which may negatively impact the Fund’s net asset value and liquidity. Similarly, large purchases of the Fund’s shares may also adversely affect the Fund’s performance to the extent that the Fund is delayed in investing new cash and is required to maintain a larger cash position than it ordinarily would. In addition, a large redemption could result in the Fund’s current expenses being allocated over a smaller asset base, leading to an increase in the Fund’s expense ratio.
The Short Term Government Fund | Cybersecurity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Cybersecurity Risk: Cybersecurity breaches may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund and/or its service providers to suffer data corruption or lose operational functionality.
The Short Term Government Fund | Interest Rate Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Interest Rate Risk: Interest rate risk is the risk that the value of the Fund’s portfolio will decline when interest rates rise. The magnitude of this decline will often be greater for longer-term, fixed-income securities than shorter-term securities. Changing interest rates may have unpredictable effects on the markets and on the Fund’s investments. Declines in interest rate levels could cause the Fund’s earnings to fall below the Fund’s expense ratio, resulting in a negative yield and a decline in the Fund’s share price. The magnitude of these fluctuations in the market price of bonds and other fixed-income securities is generally greater for those securities with longer maturities. Fluctuations in the market price of the Fund’s investments will not affect interest income derived from instruments already owned by the Fund, but will be reflected in the Fund’s net asset value. The Fund may lose money if short-term or long-term interest rates rise sharply in a manner not anticipated by Fund management. A general rise in interest rates has the potential to cause investors to move out of fixed-income securities on a large scale, which may increase redemptions from funds that hold large amounts of fixed-income securities. Heavy redemptions could cause the Fund to sell assets at inopportune times or at a loss or depressed value and could hurt the Fund’s performance.
The Short Term Government Fund | Income Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Income Risk: The Fund’s ability to distribute income to shareholders depends on the yield available from the Fund’s investments. The Fund’s portfolio income may decline when market interest rates fall.
The Short Term Government Fund | Credit Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Credit Risk: Credit risk is the risk that an issuer or guarantor of a fixed-income security may be unable or unwilling to make interest and principal payments when due and the related risk that the value of a bond may decline because of concerns about the issuer’s ability or willingness to make such payments. This may impair the Fund’s liquidity or cause a deterioration in the Fund’s net asset value. In addition, the Fund may incur expenses in an effort to protect the Fund’s interests or enforce its rights against an issuer, guarantor or counterparty or may be hindered or delayed in exercising these rights.
The Short Term Government Fund | Mortgage Backed and Asset Backed Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Mortgage-Backed and Asset-Backed Risk: Mortgage-backed securities, especially collateralized mortgage-backed securities, and asset-backed securities may be subject to risks that include price volatility, liquidity, enhanced sensitivity to interest rates, and greater risk of default during periods of economic downturn than other securities. As a result, these securities may be more difficult to value and liquidate, if necessary. To the extent the Fund invests in mortgage-backed securities that may be prepaid at the option of the obligor, sensitivity of such securities to changes in interest rates may increase (to the detriment of the Fund) when interest rates rise.
The Short Term Government Fund | Call Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Call Risk: An issuer may exercise its right to pay principal on an obligation held by the Fund (such as a mortgage-backed or asset-backed security) earlier than expected. Under these circumstances, the Fund may be unable to recoup all of its initial investment and may also suffer from having to reinvest in lower yielding securities, securities with greater credit risks or securities with other, less favorable features.
The Short Term Government Fund | Extension Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Extension Risk: An issuer may exercise its right to pay principal on an obligation held by the Fund (such as a mortgage-backed or asset-backed security) later than expected. This may happen when interest rates rise. Under these circumstances, the value of the obligation will decrease and the Fund will also suffer from the inability to invest in higher-yielding securities.
The Short Term Government Fund | Maturity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Maturity Risk: The Fund will not necessarily hold its securities to maturity, which could result in loss of principal.
The Short Term Government Fund | Prepayment Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Prepayment Risk: An issuer could exercise its right to pay principal on an obligation held by the Fund (such as a mortgage-backed or asset-backed security) earlier than expected. Prepayment of the underlying mortgage collateral of some fixed-income securities may result in a decreased rate of return and a decline in value of the securities.
The Short Term Government Fund | Liquidity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Liquidity Risk: The Fund may not be able to pay redemption proceeds within the time periods described in this Prospectus because of unusual market conditions, an unusually high number of redemption requests or other reasons. Liquidity risk may result from the lack of an active market or reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income mutual funds may be higher than normal, causing increased supply in the market due to selling activity. Certain portfolio securities may be less liquid than others, which may make them difficult or impossible to sell at an advantageous time or price.
The Short Term Government Fund | U S Government Securities Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
U.S. Government Securities Risk: Most of the securities in which the Fund invests are not backed by the full faith and credit of the U.S. Government. The U.S. Government may not provide financial support to U.S. Government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so. The maximum potential liability of the issuers of some U.S. Government securities held by the Fund may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that these issuers will not have the funds to meet their payment obligations in the future. A security backed by the “full faith and credit” of the U.S. Government is guaranteed only as to its stated interest rate and face value at maturity, not its current market price. Just like other fixed-income securities, government-guaranteed securities will fluctuate in value when interest rates change.
The Short Term Government Fund | Inflation Protected Security Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Inflation Protected Security Risk: The value of inflation protected securities, such as U.S. Treasury inflation protected public obligations, commonly known as “TIPS,” generally will fluctuate in response to changes in real interest rates, generally decreasing when real interest rates rise and increasing when real interest rates fall. Inflation-protected bonds typically have lower yields than conventional fixed-rate bonds because of their inflation adjustment feature.
The Short Term Government Fund | Short Term Government Fund  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.50%
Other Expenses rr_OtherExpensesOverAssets 0.72%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.22%
Less Fee Waiver and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.54%) [1]
Total Annual Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.68%
1 Year rr_ExpenseExampleYear01 $ 69
3 Years rr_ExpenseExampleYear03 334
5 Years rr_ExpenseExampleYear05 618
10 Years rr_ExpenseExampleYear10 $ 1,429
2015 rr_AnnualReturn2015 0.35%
2016 rr_AnnualReturn2016 0.80%
2017 rr_AnnualReturn2017 0.84%
2018 rr_AnnualReturn2018 1.01%
2019 rr_AnnualReturn2019 3.55%
2020 rr_AnnualReturn2020 2.95%
2021 rr_AnnualReturn2021 (1.08%)
2022 rr_AnnualReturn2022 (6.31%)
2023 rr_AnnualReturn2023 4.69%
2024 rr_AnnualReturn2024 3.39%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2023
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.06%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2022
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (3.11%)
1 Year rr_AverageAnnualReturnYear01 3.39%
5 Years rr_AverageAnnualReturnYear05 0.65%
10 Years rr_AverageAnnualReturnYear10 0.97%
The Short Term Government Fund | Returns After Taxes on Distributions | Short Term Government Fund  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.60%
5 Years rr_AverageAnnualReturnYear05 (0.11%)
10 Years rr_AverageAnnualReturnYear10 0.21%
The Short Term Government Fund | Returns After Taxes on Distributions and Sale of Shares | Short Term Government Fund  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.00%
5 Years rr_AverageAnnualReturnYear05 0.17%
10 Years rr_AverageAnnualReturnYear10 0.41%
The Short Term Government Fund | Bloomberg US Aggregate Bond Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.25% [2]
5 Years rr_AverageAnnualReturnYear05 (0.33%) [2]
10 Years rr_AverageAnnualReturnYear10 1.35% [2]
The Short Term Government Fund | Bloomberg U.S. 1-5 Year Government Bond Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.31% [3]
5 Years rr_AverageAnnualReturnYear05 1.01% [3]
10 Years rr_AverageAnnualReturnYear10 1.34% [3]
[1] Commerce Investment Advisors, Inc. (“Commerce” or the “Adviser”) has contractually agreed to waive all or a portion of its investment advisory fees and/or reimburse expenses in amounts necessary so that after such waivers and/or reimbursements, the maximum Total Annual Fund Operating Expenses during the current fiscal year do not exceed 0.68% of the Fund’s average daily net assets through March 1, 2026. After this date, the Adviser or the Fund may terminate the contractual arrangement.
[2] The Bloomberg US Aggregate Bond Index is an unmanaged index that measures the investment grade, U.S. dollar denominated, fixed-rate taxable bond market, including treasuries, government-related and corporate securities, mortgage-backed securities, asset-backed securities, and commercial mortgage-backed securities. The Index figures do not reflect any deduction for fees, taxes or expenses. In connection with a new regulatory requirement, effective October 31, 2024, the Fund changed its broad based index to the Bloomberg US Aggregate Bond Index.
[3] The Bloomberg U.S. 1-5 Year Government Bond Index measures the performance of U.S. dollar-denominated U.S. Treasury bonds, government related bonds (i.e., U.S. and non-U.S. agencies, sovereign, quasi-sovereign, supranational and local authority debt) and investment grade U.S. corporate bonds that have a remaining maturity of greater than or equal to one year and less than five years. The Index figures do not reflect any deduction for fees, taxes or expenses.