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Monetta Young Investor Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Monetta Young Investor Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Monetta Young Investor Fund (the “Young Investor Fund”) seeks long-term capital growth.
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 and hold shares of the Young Investor Fund.
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 Young Investor 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 Young Investor 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 Young Investor Fund’s performance. During the most recent fiscal year, the Young Investor Fund’s portfolio turnover rate was 41.9% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 41.90%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired Fund Fees and Expenses are the indirect costs of investing in other investment companies. Total Annual Fund Operating Expenses do not reflect Fund expenses paid indirectly and do not correlate to the expense ratios in the Fund’s Financial Highlights because the Financial Highlights include only the direct operating expenses incurred by the Fund and exclude Acquired Fund Fees and 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 Young Investor Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Young Investor 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 Young Investor Fund’s operating expenses remain the same.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption 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 Young Investor Fund, which is open to all investors, employs a “core-plus” investment approach: the Fund invests approximately 50% of its assets in exchange-traded funds (“ETFs”) and other funds that seek to track the S&P 500® Index (the “Index”) or other broad-based market indices that primarily include stocks of large capitalization U.S. companies. The balance of the Fund is directly invested in common stocks of companies of all market capitalization ranges and is diversified among industries and market sectors. However, the Adviser will primarily seek to invest in common stocks of large-cap companies (those with market capitalizations of at least $10 billion) that the Adviser considers to be high quality, well-known companies that produce products or provide services that are recognized by many investors.

In selecting individual stock investments, emphasis is placed on those companies that the Adviser believes to have above average long-term growth potential, a history of growth, a solid balance sheet, and an established and experienced management team. The Adviser also considers price direction, volume, and relative strength of the issuers of such investments, which the Adviser believes to be harbingers of pending fundamental changes that could lead to more/less institutional ownership. Depending on market conditions and such considerations, the Adviser may at times be very active in turning over the non-ETF portion of the Young Investor Fund’s portfolio. While the Adviser expects that the Fund’s assets will usually be invested approximately 50% in funds and 50% in direct investments, these percentages may vary significantly from time to time due to market conditions. The Fund may invest up to 10% of its assets in foreign stocks primarily through American Depositary Receipts (“ADRs”).

A bottom-up approach is used in selecting these investments by evaluating each company on the basis of its financial statements and operations. Factors such as a company’s industry leadership, competitive advantages, earnings growth, profit margins, sales trends, and dividends, as well as technical factors, are scrutinized as part of the Adviser’s analysis.

The combination of investing in a core index component and individual growth companies seeks to diversify the portfolio through the use of ETF investments while providing the Adviser with the opportunity to seek excess returns relative to the index in specific company investments.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Although every effort is made to achieve the Young Investor Fund’s objective of long-term capital growth, the Adviser cannot guarantee that the objective will be attained. You could lose all or a portion of your investment in the Fund as a result of a steep, sudden and/or prolonged market decline. The principal risks include:

·
The Adviser’s investment strategy does not achieve the Young Investor Fund’s objective;
·
The stock market or stocks in the Fund’s portfolio may decline or not increase at the rate anticipated;
·
Growth-oriented funds may under-perform when growth stocks are out of favor;
·
The Fund may make short-term investments, without limitation, for defensive purposes, which investments may provide lower returns than other types of investments;
·
ETFs are subject to substantially the same risks as those of their underlying securities or other investments held by the ETF, and investments in ETFs will result in the Fund’s shareholders indirectly bearing a proportionate share of the ETFs’ operating expenses, in addition to the direct expenses of the Fund.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose all or a portion of your investment in the Fund as a result of a steep, sudden and/or prolonged market decline.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table show the risks of investing in the Young Investor Fund. The bar chart shows the changes in the Young Investor Fund’s performance from year to year. Also shown are the Young Investor Fund’s highest and lowest quarterly returns. The table below shows the Young Investor Fund’s average annual total returns for certain time periods compared to the returns of the S&P 500® Index, a broad-based securities index. The Young Investor Fund’s past performance, before and after taxes, is not necessarily an indication of how the Young Investor Fund will perform in the future. Updated performance is available on the Fund’s website at www.monetta.com or by calling 1-800-MONETTA.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table show the risks of investing in the Young Investor Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1‑800-MONETTA
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.monetta.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Young Investor Fund’s past performance, before and after taxes, is not necessarily an indication of how the Young Investor Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading YOUNG INVESTOR FUND (MYIFX) Calendar Year Total Returns (before taxes)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return
22.97%
(Quarter ended
June 30, 2009)
Lowest
Quarterly
 Return
-12.77%
(Quarter ended
December 31, 2008)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.97%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (12.77%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns 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 Fund shares through tax-exempt, tax-advantaged, or tax-deferred arrangements, such as 401(k) plans, 529 plans, or individual retirement accounts (“IRAs”).
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
After-tax returns 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 Fund shares through tax-exempt, tax-advantaged, or tax-deferred arrangements, such as 401(k) plans, 529 plans, or individual retirement accounts (“IRAs”). Holdings in such accounts may be subject to taxes at a later date.
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (for the periods ended December 31, 2016)
Monetta Young Investor Fund | S&P 500® Index (reflects no deductions for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel S&P 500® Index (reflects no deductions for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.96%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 14.66%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 6.95%
Monetta Young Investor Fund | Monetta Young Investor Fund  
Risk/Return: rr_RiskReturnAbstract  
Shareholder Fees (fees paid directly from your investment) rr_ShareholderFeeOther none
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.42%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.04% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.26% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 128
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 400
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 692
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,523
Annual Return 2007 rr_AnnualReturn2007 5.16%
Annual Return 2008 rr_AnnualReturn2008 (26.78%)
Annual Return 2009 rr_AnnualReturn2009 49.80%
Annual Return 2010 rr_AnnualReturn2010 23.68%
Annual Return 2011 rr_AnnualReturn2011 1.51%
Annual Return 2012 rr_AnnualReturn2012 14.71%
Annual Return 2013 rr_AnnualReturn2013 32.78%
Annual Return 2014 rr_AnnualReturn2014 9.67%
Annual Return 2015 rr_AnnualReturn2015 1.40%
Annual Return 2016 rr_AnnualReturn2016 10.16%
Label rr_AverageAnnualReturnLabel Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 10.16%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 13.29%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 10.45%
Monetta Young Investor Fund | Monetta Young Investor Fund | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 9.33%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 12.26%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 9.73%
Monetta Young Investor Fund | Monetta Young Investor Fund | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.42%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 10.58%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.52%
[1] Acquired Fund Fees and Expenses are the indirect costs of investing in other investment companies. Total Annual Fund Operating Expenses do not reflect Fund expenses paid indirectly and do not correlate to the expense ratios in the Fund's Financial Highlights because the Financial Highlights include only the direct operating expenses incurred by the Fund and exclude Acquired Fund Fees and Expenses.