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Monetta Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Monetta Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Monetta 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 Monetta 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 Monetta 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 Monetta 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 Monetta Fund’s performance. During the most recent fiscal year, the portfolio turnover rate of the Monetta Fund was 120.2% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 120.20%
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 Monetta Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Monetta 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 Monetta 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 Monetta Fund invests (at the time of investment) at least 65% of its net assets, under normal market conditions, in common stocks of companies of all market capitalization ranges, although Monetta Financial Services, Inc. (the “Adviser”) expects that the Fund will primarily invest in common stocks of large-cap companies (those with market capitalizations of at least $10 billion measured at the time of investment). The Fund may invest in more volatile sectors, which could result in a disproportionate return or loss compared to the S&P 500® Index, the Fund’s benchmark. As measured at the time of investment, the Fund may invest up to 5% of its net assets in exchange-traded funds (“ETFs”) and up to 10% of its net assets in foreign stocks, which is accomplished primarily through American Depositary Receipts (“ADRs”).

The Adviser employs a bottom-up, multi-faceted investment approach, which combines fundamental, technical, and macro-economic factors in its stock selection process. A stock’s relative volatility, versus that of its industry sector and the overall market, aids the Adviser in determining individual stocks’ buy and sell points.

The Adviser’s investment decisions for the Monetta Fund’s growth style of investing are based on the Adviser’s review of a company’s financial statements and other factors, including competitive landscape and recent product announcements. The Adviser also reviews quarterly earnings reports with an emphasis on management guidance. The Adviser generally seeks to invest in companies with positive long-term earnings growth expectations and that the Adviser believes have favorable short-term technical and/or market factors, including price and volume trends, relative strength, and institutional interest. The Adviser seeks to invest in quality companies that have demonstrated a proven track record of earnings growth. The Adviser also emphasizes price direction, volume, and relative strength, which it believes to be harbingers of pending fundamental changes that could lead to more/less institutional ownership.

Depending on market conditions and the foregoing considerations, the Adviser may at times be very active in turning over the Fund’s portfolio. The Adviser’s investment decisions for the Fund’s growth style of investing are based on the Adviser’s determination that a company’s revenue and earnings growth have the potential to exceed market expectations and that the security is at an attractive entry point.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Although every effort is made to achieve the Monetta 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 Monetta Fund’s objective;
·
The stock market declines or stocks in the Monetta Fund’s portfolio may not increase at the rate anticipated;
·
Growth-oriented funds may under-perform when growth stocks are out of favor;
·
The Fund may experience periods of high portfolio turnover;
·
The Fund may make short-term investments, without limitation, for defensive purposes, which investments may provide lower returns than other types of investments;
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 some indication of the risks of investing in the Monetta Fund. The bar chart shows the changes in the Fund’s performance from year to year. Also shown are the Monetta Fund’s highest and lowest quarterly returns. The table below shows the 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 Fund’s past performance, before and after taxes, is not necessarily an indication of how the Monetta Fund will perform in the future. Updated performance information 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 some indication of the risks of investing in the Monetta 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 Fund’s past performance, before and after taxes, is not necessarily an indication of how the Monetta Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading MONETTA FUND (MONTX) Calendar Year Total Returns (before taxes)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest
Quarterly
Return
30.39%
(Quarter ended
June 30, 2009)
  
Lowest
Quarterly
 Return
-25.45%
(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 30.39%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.45%)
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 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 Fund | Monetta Fund  
Risk/Return: rr_RiskReturnAbstract  
Shareholder Fees (fees paid directly from your investment) rr_ShareholderFeeOther none
Management Fees rr_ManagementFeesOverAssets 0.95%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.50%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.46% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 149
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 462
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 797
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,746
Annual Return 2007 rr_AnnualReturn2007 27.77%
Annual Return 2008 rr_AnnualReturn2008 (47.54%)
Annual Return 2009 rr_AnnualReturn2009 48.73%
Annual Return 2010 rr_AnnualReturn2010 23.42%
Annual Return 2011 rr_AnnualReturn2011 (13.75%)
Annual Return 2012 rr_AnnualReturn2012 10.47%
Annual Return 2013 rr_AnnualReturn2013 34.89%
Annual Return 2014 rr_AnnualReturn2014 7.15%
Annual Return 2015 rr_AnnualReturn2015 3.19%
Annual Return 2016 rr_AnnualReturn2016 6.98%
Label rr_AverageAnnualReturnLabel Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.98%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 12.00%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 6.46%
Monetta Fund | Monetta Fund | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.27%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 10.11%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.56%
Monetta Fund | Monetta 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 4.52%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 9.36%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.11%
[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.