Label | Element | Value | ||||||||||||||||||||||||||||||||
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COLORADO BONDSHARES A TAX EXEMPT FUND | ||||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||
Risk/Return [Heading] | rr_RiskReturnHeading | Fund Summary | ||||||||||||||||||||||||||||||||
Objective [Heading] | rr_ObjectiveHeading | Investment Objectives/Goals | ||||||||||||||||||||||||||||||||
Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | Colorado BondShares — A Tax-Exempt Fund (the “Fund”) is a diversified, open-end mutual fund whose primary goal is to maximize income that is exempt from both federal and Colorado state income taxes while simultaneously preserving capital. The Fund also seeks opportunities for capital appreciation.
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Expense [Heading] | rr_ExpenseHeading | Fees and Expenses | ||||||||||||||||||||||||||||||||
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 commission and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in the Fund. More information about these and other discounts is available from your financial intermediary and in the section of this prospectus entitled “How Are Sales Charges Determined” beginning on page 24 and in the section of the Fund’s Statement of Additional Information entitled “What Reductions In Sales Charges Are Provided And To Whom?” beginning on page B-22. |
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Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | SHAREHOLDER FEES (fees paid directly from your investment) | ||||||||||||||||||||||||||||||||
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 of the Fund 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 (ended September 30, 2022), the Fund’s portfolio turnover rate was 9.94% of the average value of its portfolio.
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Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 9.94% | ||||||||||||||||||||||||||||||||
Expense Breakpoint Discounts [Text] | rr_ExpenseBreakpointDiscounts | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in the Fund. More information about these and other discounts is available from your financial intermediary and in the section of this prospectus entitled “How Are Sales Charges Determined” beginning on page 24 and in the section of the Fund’s Statement of Additional Information entitled “What Reductions In Sales Charges Are Provided And To Whom?” beginning on page B-22. | ||||||||||||||||||||||||||||||||
Expense Breakpoint, Minimum Investment Required [Amount] | rr_ExpenseBreakpointMinimumInvestmentRequiredAmount | $ 100,000 | ||||||||||||||||||||||||||||||||
Expense Example [Heading] | rr_ExpenseExampleHeading | Expense Example | ||||||||||||||||||||||||||||||||
Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in 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 the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
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Expense Example, No Redemption, By Year, Caption [Text] | rr_ExpenseExampleNoRedemptionByYearCaption | You would pay the following expenses if you did not redeem your shares: | ||||||||||||||||||||||||||||||||
Expense Example Closing [Text Block] | rr_ExpenseExampleClosingTextBlock | The foregoing example does not reflect sales charges (loads) on reinvested dividends and other distributions. If these sales charges (loads) were included, your costs would be higher.
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Strategy [Heading] | rr_StrategyHeading | Principal Investment Strategies of the Fund | ||||||||||||||||||||||||||||||||
Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | To achieve the Fund’s investment objective, under normal market conditions, the Fund will attempt to invest up to 100% and, except for temporary investments, will invest at least 80% of the value of its net assets (plus the amount of any borrowings for investment purposes) in tax-exempt bonds and other tax-exempt securities, including tax-exempt notes and tax-exempt municipal leases of the State of Colorado, its political subdivisions, municipalities and public authorities (“Tax-Exempt Obligations”). Under normal circumstances, the Tax-Exempt Obligations that are invested in by the Fund will mostly include tax-exempt bonds (at least 65% of the value of the Fund’s total assets). The interest on the Tax-Exempt Obligations will be exempt from regular federal income taxes and from Colorado personal income tax. The Fund may invest generally no more than 20% of the investments of the Fund in securities that may subject you to federal alternative minimum tax. The Fund will invest primarily in Tax-Exempt Obligations that are not rated by a Nationally Recognized Statistical Rating Organization, but that the Investment Adviser determines are of equivalent quality to investments rated no less than investment grade (“Baa” or “BBB”). The Fund is not restricted in the amount of not rated Tax-Exempt Obligations in which it can invest, and no more than 50% of its investments can be invested in rated Tax-Exempt Obligations. The Fund may also invest in Tax-Exempt Obligations that are rated below investment grade by a Nationally Recognized Statistical Rating Organization, or that are determined to have equivalent quality as determined by the Investment Adviser. Less than 35% of the Fund’s total assets will be invested in Tax-Exempt Obligations that are rated lower than investment grade by Moody’s or S&P, or that are determined to have equivalent below investment grade quality by the Investment Adviser at the time of purchase. The Tax-Exempt Obligations that are below investment grade may also include securities rated “Ba1” and “BB+” or below, which are sometimes referred to as “junk bonds.” Some of the securities in which the fund invests may have credit and liquidity support features, including guarantees and letters of credit. The Fund is a “diversified” investment company, meaning that as to 75% of the Fund’s total assets, no more than 5% of the assets of the Fund will be invested in the obligations of any one issuer. Obligations which are not rated generally offer higher yields than Tax-Exempt Obligations with equivalent quality that are rated, but also are generally subject to higher risk. The Fund relies on the professional judgment of the Investment Adviser (through the portfolio manager) to make decisions about the Fund’s portfolio securities and the Fund’s investments, and given that most of the Fund’s investments are not rated, the Investment Adviser’s judgment, analysis and experience (through the portfolio manager) are more important than they would be if the Fund relied more on rating agencies for evaluating credit quality. The Investment Adviser attempts to manage the higher risk of investing in not rated Tax-Exempt Obligations by analyzing various factors in managing the Fund’s portfolio, which may include performing credit analysis, reviewing the current economic trends and developments in the geographic areas affecting the Fund’s investments, reviewing general market conditions, comparing pricing of similar investments issued by comparable issuers, reviewing current and anticipated changes in interest rates, evaluating other factors relevant to a particular security being evaluated and actively managing and diversifying the portfolio among municipal issuers. Securities may be sold when the Investment Adviser believes that they no longer represent relatively attractive investment opportunities.
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Risk [Heading] | rr_RiskHeading | Principal Risks of Investing in the Fund | ||||||||||||||||||||||||||||||||
Risk Narrative [Text Block] | rr_RiskNarrativeTextBlock | By investing in the Fund, you are subject to several investment risks. The occurrence of any one of these risks, or a combination of these risks, could adversely affect the Fund’s net asset value, yield and/or total return. By investing in the Fund, you are exposed to the following principal risks:
The Fund is designed for investors subject to income taxation in the higher tax brackets who can take advantage of the tax-exempt nature of the Fund’s income. The Fund is not intended for tax-exempt investors such as pension funds, charities or IRAs who cannot take advantage of the tax benefits of the Fund.
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Risk Lose Money [Text] | rr_RiskLoseMoney | You can lose money on your investment. | ||||||||||||||||||||||||||||||||
RIsk Not Insured [Text] | rr_RiskNotInsured | Your investment in the Fund is not insured or guaranteed by any government agency. | ||||||||||||||||||||||||||||||||
Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance Information Bar Chart and Table | ||||||||||||||||||||||||||||||||
Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The following bar chart and table show some 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 for the one-year, five-year and 10-year periods ended December 31, 2022 compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available by contacting the Fund at (303) 572-6990 or, outside of Denver, at (800) 572-0069 or through the Fund’s website at https://www.coloradobondshares.com as set forth on the back page of this prospectus.
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Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | The following bar chart and table show some 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 for the one-year, five-year and 10-year periods ended December 31, 2022 compare with those of a broad measure of market performance. | ||||||||||||||||||||||||||||||||
Performance Additional Market Index [Text] | rr_PerformanceAdditionalMarketIndex | The Lipper Index, the secondary index included by the Fund in the table above, is a non-weighted index of the 30 largest funds that invest at least 65% of their respective assets in municipal debt issues that are rated in one of the top four credit rating categories (without consideration of plus or minus modifiers). The Lipper Index is the same index that the Fund has utilized since it began including this table in its prospectus and includes funds that disclose investment objectives that are reasonably comparable to the Fund’s primary objective. | ||||||||||||||||||||||||||||||||
Performance Availability Phone [Text] | rr_PerformanceAvailabilityPhone | (303) 572-6990 or, outside of Denver, at (800) 572-0069 | ||||||||||||||||||||||||||||||||
Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | https://www.coloradobondshares.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 | Annual Total Returns | ||||||||||||||||||||||||||||||||
Bar Chart Narrative [Text Block] | rr_BarChartNarrativeTextBlock | The following bar chart shows the Fund’s annual total returns for each of the last 10 calendar years.+ Sales charges (loads) are not reflected in the bar chart and if these amounts were reflected, returns would be less than those shown.
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Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | Sales charges (loads) are not reflected in the bar chart and if these amounts were reflected, returns would be less than those shown. | ||||||||||||||||||||||||||||||||
Bar Chart Closing [Text Block] | rr_BarChartClosingTextBlock | During the 10-year period reflected in the bar chart, the Fund’s highest return for a calendar quarter was 4.13% in the quarter ended June 30, 2020 and the lowest return was (3.23)% in the quarter ended March 31, 2020.
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Performance Table Heading | rr_PerformanceTableHeading | Average Annual Total Returns | ||||||||||||||||||||||||||||||||
Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | The after-tax returns in the table 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, and after-tax returns shown are not relevant to investors who hold their shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | ||||||||||||||||||||||||||||||||
Performance Table Explanation after Tax Higher | rr_PerformanceTableExplanationAfterTaxHigher | After-tax returns on distributions and sales of shares of the Fund will be higher than other return figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the investor. | ||||||||||||||||||||||||||||||||
Performance Table Narrative | rr_PerformanceTableNarrativeTextBlock | The following table summarizes the Fund’s average annual total return (before taxes, after taxes on distributions, and after taxes on distributions and sales of shares of the Fund) for the one-, five- and 10‑calendar year periods ended December 31, 2022 and compares them to two different broad measures of market results, including the Bloomberg Barclays Capital Municipal Bond Total Return Index (“Barclays Index”) and the Lipper General Municipal Debt Fund Index (“Lipper Index”). Past performance (before and after taxes) is not indicative of future performance. The after-tax returns in the table 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, and after-tax returns shown are not relevant to investors who hold their shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns on distributions and sales of shares of the Fund will be higher than other return figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the investor.
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Average Annual Return, Caption | rr_AverageAnnualReturnCaption | AVERAGE ANNUAL TOTAL RETURNS (for the periods ended December 31, 2022) | ||||||||||||||||||||||||||||||||
COLORADO BONDSHARES A TAX EXEMPT FUND | COLORADO BONDSHARES A TAX EXEMPT FUND | ||||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 4.75% | ||||||||||||||||||||||||||||||||
Management Fee | rr_ManagementFeesOverAssets | 0.50% | ||||||||||||||||||||||||||||||||
Other Expenses (Legal, audit, transfer agent, reporting and custodian fees and expenses) | rr_OtherExpensesOverAssets | 0.05% | ||||||||||||||||||||||||||||||||
Total Annual Fund Operating Expenses | rr_ExpensesOverAssets | 0.55% | ||||||||||||||||||||||||||||||||
1 YEAR | rr_ExpenseExampleYear01 | $ 529 | ||||||||||||||||||||||||||||||||
3 YEARS | rr_ExpenseExampleYear03 | 643 | ||||||||||||||||||||||||||||||||
5 YEARS | rr_ExpenseExampleYear05 | 768 | ||||||||||||||||||||||||||||||||
10 YEARS | rr_ExpenseExampleYear10 | 1,312 | ||||||||||||||||||||||||||||||||
1 YEAR | rr_ExpenseExampleNoRedemptionYear01 | 529 | ||||||||||||||||||||||||||||||||
3 YEARS | rr_ExpenseExampleNoRedemptionYear03 | 643 | ||||||||||||||||||||||||||||||||
5 YEARS | rr_ExpenseExampleNoRedemptionYear05 | 768 | ||||||||||||||||||||||||||||||||
10 YEARS | rr_ExpenseExampleNoRedemptionYear10 | $ 1,312 | ||||||||||||||||||||||||||||||||
2013 | rr_AnnualReturn2013 | 1.74% | [1] | |||||||||||||||||||||||||||||||
2014 | rr_AnnualReturn2014 | 5.89% | [1] | |||||||||||||||||||||||||||||||
2015 | rr_AnnualReturn2015 | 4.75% | [1] | |||||||||||||||||||||||||||||||
2016 | rr_AnnualReturn2016 | 2.52% | [1] | |||||||||||||||||||||||||||||||
2017 | rr_AnnualReturn2017 | 6.64% | [1] | |||||||||||||||||||||||||||||||
2018 | rr_AnnualReturn2018 | 4.57% | [1] | |||||||||||||||||||||||||||||||
2019 | rr_AnnualReturn2019 | 6.47% | [1] | |||||||||||||||||||||||||||||||
2020 | rr_AnnualReturn2020 | 5.00% | [1] | |||||||||||||||||||||||||||||||
2021 | rr_AnnualReturn2021 | 4.78% | [1] | |||||||||||||||||||||||||||||||
2022 | rr_AnnualReturn2022 | (4.46%) | [1] | |||||||||||||||||||||||||||||||
Year to Date Return, Label | rr_YearToDateReturnLabel | Fund’s return | ||||||||||||||||||||||||||||||||
Bar Chart, Year to Date Return, Date | rr_BarChartYearToDateReturnDate | Dec. 31, 2022 | ||||||||||||||||||||||||||||||||
Bar Chart, Year to Date Return | rr_BarChartYearToDateReturn | 2.34% | ||||||||||||||||||||||||||||||||
Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | highest return | ||||||||||||||||||||||||||||||||
Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Jun. 30, 2020 | ||||||||||||||||||||||||||||||||
Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 4.13% | ||||||||||||||||||||||||||||||||
Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | lowest return | ||||||||||||||||||||||||||||||||
Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | ||||||||||||||||||||||||||||||||
Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (3.23%) | ||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (9.00%) | ||||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 2.19% | ||||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 3.24% | ||||||||||||||||||||||||||||||||
COLORADO BONDSHARES A TAX EXEMPT FUND | Return After Taxes on Distributions | COLORADO BONDSHARES A TAX EXEMPT FUND | ||||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (9.08%) | ||||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 2.14% | ||||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 3.10% | ||||||||||||||||||||||||||||||||
COLORADO BONDSHARES A TAX EXEMPT FUND | Return After Taxes on Distributions and Sales of Fund Shares | COLORADO BONDSHARES A TAX EXEMPT FUND | ||||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (6.45%) | ||||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 2.54% | ||||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 3.26% | ||||||||||||||||||||||||||||||||
COLORADO BONDSHARES A TAX EXEMPT FUND | Barclays Index (reflects no deductions for fees, expenses or taxes) | ||||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (8.53%) | ||||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 1.25% | ||||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 2.13% | ||||||||||||||||||||||||||||||||
COLORADO BONDSHARES A TAX EXEMPT FUND | Lipper Index (reflects no deductions for fees, expenses or taxes) | ||||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (10.96%) | [2] | |||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 0.98% | [2] | |||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 2.09% | [2] | |||||||||||||||||||||||||||||||
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