Objective, Primary [Text Block]

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Risk/Return [Heading]

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Kinetics Market Opportunities Fund

Objective [Heading]

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Investment Objective

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The investment objective of the Market Opportunities Fund is long-term growth of capital. The Market Cap Opportunities Fund is the sole “feeder fund” to The Market Cap Opportunities Portfolio, a series of Kinetics Portfolios Trust.

Expense [Heading]

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Fees and Expenses of the Fund

Expense Narrative [Text Block]

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This table describes the fees and expenses you may pay if you buy and hold shares of the Market Opportunities Fund. You may qualify for sales charge discounts for Advisor Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in Advisor Class A shares of the Kinetics Funds. More information about these and other discounts is available from your financial professional and in the sections titled “Description of Advisor Classes” beginning on page 69 of the Fund’s prospectus and “Purchasing Shares” beginning on page 49 of the Fund’s statement of additional information.

Shareholder Fees Caption [Text]

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Shareholder Transaction Expenses (fees paid directly from your investment)

Operating Expenses Caption [Text]

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Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

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2014-05-01

Portfolio Turnover [Heading]

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Portfolio Turnover.

Portfolio Turnover [Text Block]

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The Market Opportunities Portfolio 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 Market Opportunities Portfolio’s, and therefore the Market Opportunities Fund’s, performance. During the most recent fiscal year, the Market Opportunities Portfolio’s portfolio turnover rate was 26% of the average value of its portfolio.

Portfolio Turnover, Rate

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26.00%

Expenses Represent Both Master and Feeder [Text]

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This table and the example below reflect the aggregate expenses of the Market Opportunities Fund and the Market Opportunities Portfolio. The management fees paid by the Market Opportunities Fund reflect the proportionate share of fees allocated to the Market Opportunities Fund from the Market Opportunities Portfolio.

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

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Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets before expense reimbursement found in the "Financial Highlights" section of this Prospectus which reflects the Market Opportunities Fund's operating expenses and does not include 0.006% attributed to acquired fund fees and expenses ("AFFE").

Expense Example [Heading]

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Example.

Expense Example Narrative [Text Block]

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This Example is intended to help you compare the cost of investing in the Market Opportunities Fund with the cost of investing in other mutual funds.

This Example assumes that you invest $10,000 in the Market Opportunities Fund for the time periods indicated and then redeem all of your shares at the end of these periods. The Example also assumes that your investment has a 5% return each year and that the Market Opportunities Fund’s operating expenses remain the same.

Expense Example by, Year, Caption [Text]

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Although your actual costs may be higher or lower, based on these assumptions your cost for the Market Opportunities Fund would be:

Strategy [Heading]

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Principal Investment Strategy

Strategy Narrative [Text Block]

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The Market Opportunities Fund is a non-diversified fund that invests all of its investable assets in the Market Opportunities Portfolio, a series of Kinetics Portfolios Trust. Under normal circumstances, the Market Opportunities Portfolio invests at least 65% of its net assets in common stocks, convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of U.S. and foreign companies involved in capital markets or related to capital markets, as well as companies involved in the gaming industry. Capital market companies include companies that are engaged in or derive a substantial portion of their revenue from activities with a publicly traded securities exchange, such as equity exchanges and commodity exchanges, including but not limited to clearing firms and brokerage houses. The Market Opportunities Portfolio may also invest in exchange-traded funds (“ETFs”) and write and sell options on securities in which it invests for hedging purposes and/or direct investment.

The Market Opportunities Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities which the Investment Adviser has determined to be of comparable quality.

The Market Opportunities Portfolio securities will be selected by the Investment Adviser from companies that are engaged in public exchanges, derivative exchanges, and capital markets; companies that experience operational scale from increased volume such as investment banks, credit card processing companies, electronic payment companies and companies in the gaming industry; and from companies that act as facilitators such as publicly traded expressways, airports, roads and railways. Companies that experience operational scale from increased volume are similar to capital markets companies because they have greater fixed costs than variable costs, operating margins that rise once fixed costs are covered, and an ability to generate higher operating margins once fixed costs are covered (referred to as operating leverage). High operating leverage describes a company’s ability to experience rising profit margins as revenues increase. These companies may be large, medium or small in size if, in the Investment Adviser’s opinion, these companies meet the Market Opportunities Portfolio’s investment criteria. The Investment Adviser seeks to invest in companies with high operating leverage that can expand capacity with negligible or limited associated costs. Generally, high returns on equity, long product life cycles, high barriers to entry and certain degrees of financial gearing are necessary for this. Financial gearing occurs with the use of loans and debt in companies where it is necessary to build capacity and infrastructure before operations can begin.

Sell decisions are generally triggered by either adequate value being achieved, as determined by the Investment Adviser, or by an adverse change in a company’s operating performance or a deterioration of the company’s business model. A sell trigger may also occur if the Investment Adviser discovers a new investment opportunity that it believes is more compelling and represents a greater risk reward profile than other investment(s) held by the Market Opportunities Portfolio.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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Investing in common stocks has inherent risks that could cause you to lose money. The principal risks of investing in the Market Opportunities Fund, and indirectly the Market Opportunities Portfolio, are listed below and could adversely affect the net asset value (“NAV”), total return and the value of the Market Opportunities Fund, Market Opportunities Portfolio and your investment.

Stock Market Risks: Stock mutual funds are subject to stock market risks and significant fluctuations in value. If the stock market declines in value, the Market Opportunities Portfolio, and therefore the Market Opportunities Fund, is likely to decline in value and you could lose money on your investment.

»	Stock Selection Risks: The portfolio securities selected by the Investment Adviser may decline in value or not increase in value when the stock market in general is rising and may fail to meet the Market Opportunities Portfolio’s, and therefore the Market Opportunities Fund’s, investment objective.

»	Liquidity Risks: The Investment Adviser may not be able to sell portfolio securities at an optimal time or price.

Sector Emphasis Risks: The Market Opportunities Portfolio’s investments in the capital markets sector subjects it to the risks affecting that sector more than would a fund that invests in a wide variety of market sectors. For instance, companies in the capital markets sector may be adversely affected by changes in economic conditions as well as legislative initiatives, all of which may impact the profitability of companies in this sector. The Market Opportunities Portfolio’s investments in the gaming sector may be adversely affected by changes in economic conditions. The casino industry is particularly susceptible to economic conditions that negatively affect tourism. Casino and gaming companies are highly competitive, and new products, casino concepts and venues are competitive challenges to existing companies. In addition, gaming and related companies are highly regulated, and state and federal legislative changes can significantly impact profitability in those sectors.

Small and Medium-Size Company Risks: The Market Opportunities Portfolio may invest in the equity securities of small and medium-size companies. Small and medium-size companies often have narrower markets and more limited managerial and financial resources than do larger, more established companies. As a result, their performance can be more volatile and they face a greater risk of business failure, which could increase the volatility of the Market Opportunities Portfolio’s assets.

Exchange-Traded Funds (ETFs): ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, passively-managed ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as Standard & Poor’s, selects as representative of a market, market segment or industry sector. A passively-managed ETF is designed so that its performance will correspond closely with that of the index it tracks. As a shareholder in an ETF, the Market Opportunities Portfolio will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses.

Foreign Securities Risks: The Market Opportunities Portfolio may invest in foreign securities directly or through ADRs, GDRs and IDRs. Foreign securities can carry higher returns but involve more risks than those associated with U.S. investments. Additional risks associated with investment in foreign securities include currency fluctuations, political and economic instability, differences in financial reporting standards and less stringent regulation of securities markets.

Non-Diversification Risks: As a non-diversified investment company, the Market Opportunities Portfolio can invest a large percentage of its assets in a small number of issuers. As a result, a change in the value of any one investment may affect the overall value of the Market Opportunities Portfolio’s shares, and therefore the Market Opportunities Fund’s shares, more than shares of a diversified mutual fund that holds more investments.

Option Transaction Risks: Purchasing and writing put and call options are highly specialized activities and entail greater than ordinary investment risks. The successful use of options depends in part on the ability of the Investment Adviser to manage future price fluctuations and the degree of correlation between the options and securities markets. By writing put options on equity securities, the Market Opportunities Portfolio gives up the opportunity to benefit from potential increases in the value of the common stocks above the strike prices of the written put options, but continues to bear the risk of declines in the value of its common stock portfolio. The Market Opportunities Portfolio will receive a premium from writing a covered call option that it retains whether or not the option is exercised. The premium received from the written options may not be sufficient to offset any losses sustained from the volatility of the underlying equity securities over time.

»	Below-Investment Grade Debt Securities Risks: Generally, non-investment grade debt securities, i.e., junk bonds, are subject to greater credit risk, price volatility and risk of loss than investment grade securities.

»	Management Risk: There is no guarantee that the Market Opportunities Fund will meet its investment objective. The Investment Adviser does not guarantee the performance of the Market Opportunities Fund, nor can it assure you that the market value of your investment will not decline.

Who may want to invest?

The Market Opportunities Fund may be appropriate for investors who:

»	wish to invest for the long-term;

»	want to diversify their portfolios;

»	want to allocate some portion of their long-term investments to growth equity investing;

»	are willing to accept the volatility associated with equity investing; and

»	are comfortable with the risks described herein.

Risk Lose Money [Text]

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Investing in common stocks has inherent risks that could cause you to lose money.

Risk Nondiversified Status [Text]

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As a non-diversified investment company, the Market Opportunities Portfolio can invest a large percentage of its assets in a small number of issuers. As a result, a change in the value of any one investment may affect the overall value of the Market Opportunities Portfolio's shares, and therefore the Market Opportunities Fund's shares, more than shares of a diversified mutual fund that holds more investments.

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

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The bar chart and table shown below illustrate the variability of the Market Opportunities Fund’s returns. The bar chart indicates the risks of investing in the Market Opportunities Fund by showing the changes in the Market Opportunities Fund’s performance from year to year (on a calendar year basis). The table shows how the Market Opportunities Fund’s average annual returns, before and after taxes (after taking into account any sales charges) compare with those of the S&P 500® Index and the MSCI EAFE Index, which represent broad measures of market performance. The past performance of the Market Opportunities Fund, before and after taxes, is not necessarily an indication of how the Market Opportunities Fund or the Market Opportunities Portfolio will perform in the future. The bar chart shows how the performance of Advisor Class A shares (the Class with the longest period of annual returns) has varied from year to year. The returns for Advisor Class C shares were different than the returns shown below because each Class of shares has different expenses. Updated performance information is available on the Fund’s website at http://www.kineticsfunds.com/ or by calling the Fund toll-free at (800) 930-3828.

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and table shown below illustrate the variability of the Market Opportunities Fund's returns. The bar chart indicates the risks of investing in the Market Opportunities Fund by showing the changes in the Market Opportunities Fund's performance from year to year (on a calendar year basis). The table shows how the Market Opportunities Fund's average annual returns, before and after taxes (after taking into account any sales charges) compare with those of the S&P 500 Index and the MSCI EAFE Index, which represent broad measures of market performance.

Performance Availability Phone [Text]

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(800) 930-3828

Performance Availability Website Address [Text]

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http://www.kineticsfunds.com

Performance Past Does Not Indicate Future [Text]

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The past performance of the Market Opportunities Fund, before and after taxes, is not necessarily an indication of how the Market Opportunities Fund or the Market Opportunities Portfolio will perform in the future.

Bar Chart [Heading]

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The Market Opportunities Fund - Advisor Class A Calendar Year Returns as of 12/31

Bar Chart Does Not Reflect Sales Loads [Text]

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Sales charges are not reflected in the bar chart. If these amounts were reflected, returns would be less than those shown.

Bar Chart Closing [Text Block]

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Sales charges are not reflected in the bar chart. If these amounts were reflected, returns would be less than those shown.

Best Quarter:	2009	Q2	30.36%
Worst Quarter:	2008	Q4	-27.26%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Jun. 30, 2009

Highest Quarterly Return

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30.36%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

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Dec. 31, 2008

Lowest Quarterly Return

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(27.26%)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deductions for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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The after-tax returns for the Market Opportunities Fund's Advisor Class A shares as shown in the following table 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

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Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account ("IRA"), the information on after-tax returns is not relevant to your investment.

Performance Table One Class of after Tax Shown [Text]

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After-tax returns are shown for Advisor Class A shares only. After-tax returns for Advisor Class C shares will differ.

Performance Table Narrative

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The after-tax returns for the Market Opportunities Fund’s Advisor Class A shares as shown in the following table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment. After-tax returns are shown for Advisor Class A shares only. After-tax returns for Advisor Class C shares will differ.

Caption

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Average Annual Total Returns as of 12/31/2012

S&P 500® Index Class A Comparison(reflects no deduction for fees, expenses or taxes)

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S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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16.00%

rr_AverageAnnualReturnYear05

1.66%

rr_AverageAnnualReturnSinceInception

3.78%

^[1]

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Jan. 31, 2006

MSCI EAFE Index Class A Comparison (reflects no deductions for fees, expenses or taxes)

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MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)

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17.32%

rr_AverageAnnualReturnYear05

(3.69%)

rr_AverageAnnualReturnSinceInception

1.34%

^[1]

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Jan. 31, 2006

S&P 500® Index Class C Comparison (reflects no deduction for fees, expenses or taxes)

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S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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16.00%

rr_AverageAnnualReturnYear05

1.66%

rr_AverageAnnualReturnSinceInception

1.85%

^[1]

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Feb. 16, 2007

MSCI EAFE Index Class C Comparison (reflects no deductions for fees, expenses or taxes)

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MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

17.32%

rr_AverageAnnualReturnYear05

(3.69%)

rr_AverageAnnualReturnSinceInception

(2.09%)

^[1]

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Feb. 16, 2007

Advisor Class A

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

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5.75%

Redemption Fee (as a percentage of Amount Redeemed)

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(2.00%)

Management Fees

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1.25%

^[2]

Distribution (Rule 12b-1) Fees

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0.25%

Shareholder Servicing Fees

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0.25%

Other Operating Expenses

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0.48%

Other Expenses

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0.73%

Total Annual Fund Operating Expenses

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2.23%

^[3]

Fee Waiver or Reimbursement

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(0.33%)

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Net Annual Fund Operating Expenses

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1.90%

Expense Breakpoint Discounts [Text]

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You may qualify for sales charge discounts for Advisor Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in Advisor Class A shares of the Kinetics Funds.

Expense Breakpoint, Minimum Investment Required [Amount]

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50,000

Expense Example, with Redemption, 1 Year

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757

Expense Example, with Redemption, 3 Years

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1,202

Expense Example, with Redemption, 5 Years

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1,673

Expense Example, with Redemption, 10 Years

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2,968

Annual Return 2007

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33.54%

Annual Return 2008

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(54.91%)

Annual Return 2009

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49.66%

Annual Return 2010

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11.11%

Annual Return 2011

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(8.08%)

Annual Return 2012

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17.26%

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The Market Opportunities Fund (KMKAX) Advisor Class A Return Before Taxes

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10.48%

rr_AverageAnnualReturnYear05

(5.30%)

rr_AverageAnnualReturnSinceInception

3.01%

^[1]

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Jan. 31, 2006

Advisor Class A | After Taxes on Distributions

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The Market Opportunities Fund (KMKAX) Advisor Class A Return After Taxes on Distributions

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10.26%

rr_AverageAnnualReturnYear05

(5.51%)

rr_AverageAnnualReturnSinceInception

2.84%

^[1]

Advisor Class A | After Taxes on Distributions and Sale of Fund Shares

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The Market Opportunities Fund (KMKAX) Advisor Class A Return After Taxes on Distributions and Sale of Fund Shares

rr_AverageAnnualReturnYear01

7.10%

rr_AverageAnnualReturnYear05

(4.44%)

rr_AverageAnnualReturnSinceInception

2.57%

^[1]

Advisor Class C

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

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none

Redemption Fee (as a percentage of Amount Redeemed)

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(2.00%)

Management Fees

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1.25%

^[2]

Distribution (Rule 12b-1) Fees

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0.75%

Shareholder Servicing Fees

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0.25%

Other Operating Expenses

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0.48%

Other Expenses

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0.73%

Total Annual Fund Operating Expenses

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2.73%

^[3]

Fee Waiver or Reimbursement

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(0.33%)

^[4]

Net Annual Fund Operating Expenses

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2.40%

Expense Example, with Redemption, 1 Year

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243

Expense Example, with Redemption, 3 Years

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816

Expense Example, with Redemption, 5 Years

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1,415

Expense Example, with Redemption, 10 Years

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3,037

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The Market Opportunities Fund (KMKCX) Advisor Class C Return Before Taxes

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16.70%

rr_AverageAnnualReturnYear05

(4.61%)

rr_AverageAnnualReturnSinceInception

(0.46%)

^[1]