2.2.0.25truefalse010000 - Document - Risk/Return Summary {Unlabeled}falsefalsetrue1falsefalsetruefalse{dei_LegalEntityAxis} : Value Line Fund 5/1/2011 - 5/1/2011 Context_FYE_01-May-2011_LegalEntityAxis_S000007570Memberhttp://www.sec.gov/CIK0000102756duration2011-05-01T00:00:002011-05-01T00:00:00falsefalsevlifx_S000007570Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli03false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="text-align:center;"><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;" ><b>The Value Line Fund, Inc.</b></font></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse4false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><font style="font-family:times new roman;font-size:10pt;" ><b><i>Investment objectives</i></b></font></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><font style="display:inline;font-family:times new roman;font-size:10pt;" >The Fund's primary investment objective is long-term growth of capital.</font></div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse6false0rr_ObjectiveSecondaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><font style="display:inline;font-family:times new roman;font-size:10pt;" >Current income is a secondary investment objective.</font></div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse7false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><font style="font-family:times new roman;font-size:10pt;" ><b><i>Fees and expenses</i></b></font></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example This 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The 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. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse8false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. There are no shareholder fees (fees paid directly from your investment). </font></div></div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse9false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</font></div></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse10false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact vlifx_S000007570Member row primary compact * ~ </div>falsefalse<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact vlifx_S000007570Member row primary compact * ~ </div>falsehttp://xbrl.sec.gov/rr/role/OperatingExpensesDatafalsefalse020020 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxisvlifx_S000007570MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseValue Line Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMemberfalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line FundValue Line Fund C000020635USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00700.0070falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00700.0070falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*5false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00390.0039falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00390.0039falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*6false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01310.0131falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01310.0131falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*7false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0035-0.0035[1]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue-0.0035-0.0035falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*8false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00960.0096falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00960.0096falsefalsefalsetruefalseOthernanafalsefalse1Effective May 1, 2011 through April 30, 2012, EULAV Asset Management (the "Adviser" ) has contractually agreed to waive the portion of the management fee equal to 0.10% on the first $100 million of the Fund's average daily net assets, and 0.15% on any additional assets and EULAV Securities LLC (the "Distributor") has contractually agreed to waive all of the Fund's 12b-1 fee in an amount equal to 0.25% of the Fund's average daily net assets. The waivers cannot be terminated without the approval of the Fund's Board of Directors.16Annual Fund Operating Expenses UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxisvlifx_S000007570MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse11false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Example</font></div></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse12false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><table cellspacing="0" cellpadding="0" width="100%" style="font-family:times new roman;font-size:10pt;" ><tr><td valign="top" width="74%" align="left" ><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >This 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 whether or not you 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 except in year one. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</font></div></td></tr></table></div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse13false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact vlifx_S000007570Member row primary compact * ~ </div>falsefalse<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact vlifx_S000007570Member row primary compact * ~ </div>truehttp://xbrl.sec.gov/rr/role/ExpenseExamplefalsefalse020030 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue9898falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue381381falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue685685falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue15481548falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxisvlifx_S000007570MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseValue Line Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMemberfalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line FundValue Line Fund C000020635USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue9898falsefalsefalsetruefalse2truefalsetrue381381falsefalsefalsetruefalse3truefalsetrue685685falsefalsefalsetruefalse4truefalsetrue15481548falsefalsefalsetruefalseOthernanafalsefalse41Expense Example (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxisvlifx_S000007570MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse14false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Portfolio turnover</font></div></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse15false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >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 27 % of the average value of its portfolio.</font></div></div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse16false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Principal investment strategies of the Fund <a name="t69496a004v3" > </a><font style="font-family:times new roman;font-size:10pt;" > </font> </font> </div> </div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse17false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >To achieve the Fund's investment objectives, the Adviser invests substantially all of the Fund's net assets in common stocks. While the Fund is actively managed by the Adviser, the Adviser relies primarily on the rankings of companies by the Value Line Timeliness&#8482; Ranking System (the "Ranking System") in selecting securities for purchase or sale. The Ranking System is a proprietary quantitative system that compares an estimate of the probable market performance of each stock within a universe during the next six to twelve months to that of all stocks within that universe and ranks stocks on a scale of 1 (highest) to 5 (lowest). The universe followed by the Ranking System consists of stocks of approximately 1,700 companies accounting for approximately 95% of the market capitalization of all stocks traded on the U.S. securities exchanges. All the stocks followed by the Ranking System are listed on U.S. stock exchanges or traded in the U.S. over-the-counter markets. The Fund's investments principally are selected from common stocks ranked 1, 2 or 3 by the Ranking System at the time of purchase. Apart from the diversification requirements of the Investment Company Act of 1940 applicable to diversified funds (which generally means that it will not invest more than 5% of its total assets in the stocks of any one company), the Fund is not subject to any limit on the percentage of its assets that may be invested in any particular stock. Because the Adviser relies on the Ranking System in managing the Fund's portfolio, the Fund is not limited to investments according to a company's size. </font> </div><br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >The Adviser may sell securities for a variety of reasons, such as to secure gains, limit losses or redeploy assets into more promising opportunities. </font> </div><br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >As described above, the Adviser relies primarily on the rankings of companies by the Ranking System in selecting stocks for the Fund, but has discretion, including whether and which ranked stocks to include within the Fund's portfolio, whether and when to buy or sell stocks based upon changes in their rankings, and the frequency and timing of rebalancing the Fund's portfolio. The Adviser will determine the percentage of the Fund's assets invested in each stock based on the stock's relative attractiveness. </font> </div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse18false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Principal risks of investing in the Fund <a name="t69496a005v3" > </a> </font> </div> </div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse19false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >Investing in any mutual fund involves risk, including the risk that you may receive little or no return on your investment, and that you may lose part or all of your investment. Therefore, before you invest in this Fund you should carefully evaluate the risks.</font></div> <br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >The chief risk that you assume when investing in the Fund is market risk, the possibility that the securities in a certain market will decline in value because of factors such as economic conditions. Market risk may affect a single issuer, an industry, a sector of the economy or the market as a whole. </font></div> <br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >Because the Fund is actively managed, its investment return depends on the ability of the Adviser to manage its portfolio successfully. The Adviser's investment strategies may not be able to produce the desired results.</font></div> <br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >The Fund's annual portfolio turnover rate has exceeded 100% in four of the last five years. A rate of portfolio turnover of 100% would occur if all of the Fund's portfolio were replaced in a period of one year. To the extent the Fund engages in short - term trading in attempting to achieve its investment objective, it will increase the Fund's portfolio turnover rate and the Fund will incur higher brokerage commissions and other expenses.</font></div> <br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >An investment in the Fund is not a complete investment program and you should consider it just one part of your total investment program. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. For a more complete discussion of risk, please turn to page 10.</font></div> <br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >Because the Fund uses the Ranking System, there is the risk that securities not covered by the Ranking System or lower rated securities will appreciate to a greater extent than those securities in the Fund's portfolio.</font></div> <br/> <div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >The price of Fund shares will increase and decrease according to changes in the value of the Fund's investments. The Fund will be affected by changes in stock prices, which have historically tended to fluctuate more than bond prices.</font></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse20false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Fund performance </font> </div> </div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse21false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >This bar chart and table can help you evaluate the potential risks of investing in the Fund. The bar chart below shows how returns for the Fund's shares have varied over the past ten calendar years, and the table below shows the average annual total returns (before and after taxes) of these shares for one, five, and ten years. These returns are compared to the performance of the S&amp;P 500&#174;<font style="display:inline;font-size:70%;vertical-align:text-top;" > </font>Index, which is a broad based market index. The Fund's past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. Updated performance information is available at: www.vlfunds.com. </font> </div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse22false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Total returns (before taxes) as of 12/31 each year (%) </font> </div> </div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse23false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact vlifx_S000007570Member row rr_ProspectusShareClassAxis compact vlifx_C000020635Member row primary compact * ~ </div>falsefalseBarChart1.jpg<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact vlifx_S000007570Member row rr_ProspectusShareClassAxis compact vlifx_C000020635Member row primary compact * ~ </div>falsehttp://xbrl.sec.gov/rr/role/BarChartDatafalsefalse020050 - Schedule - Annual Total Returnstruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxisvlifx_S000007570MemberColumnunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseValue Line Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMemberValue Line FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*3false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1282-0.1282falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2001truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1282-0.1282falsefalsefalsetruefalseOthernanafalsefalse2falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2535-0.2535falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2535-0.2535falsefalsefalsetruefalseOthernanafalsefalse3falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.16280.1628falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.16280.1628falsefalsefalsetruefalseOthernanafalsefalse4falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12090.1209falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12090.1209falsefalsefalsetruefalseOthernanafalsefalse5falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.1040.104falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.1040.104falsefalsefalsetruefalseOthernanafalsefalse6falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.040.04falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.040.04falsefalsefalsetruefalseOthernanafalsefalse7falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.1950.195falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.1950.195falsefalsefalsetruefalseOthernanafalsefalse8falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.4928-0.4928falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.4928-0.4928falsefalsefalsetruefalseOthernanafalsefalse9falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09490.0949falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09490.0949falsefalsefalsetruefalseOthernanafalsefalse10falseRowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.25550.2555falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberValue Line Fund C0000206350rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.25550.2555falsefalsefalsetruefalseOthernanafalsefalse110Annual Total Returns Value Line Fund C000020635UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxisvlifx_S000007570MemberColumnunitUnit*Rowrr_ProspectusShareClassAxisAxisvlifx_C000020635MemberRowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalse24false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table> <tr> <td align="left" valign="top" width="15%"><div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Best Quarter:</font></div></td> <td align="left" valign="top" width="85%"><div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#160;&#160;Q4 2004 &#160;&#160;&#160;+13.28</font></div></td> </tr> <tr> <td align="left" valign="top" width="15%"><div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Worst Quarter:</font></div></td> <td align="left" valign="top" width="85%"><div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#160;&#160;Q4 2008 &#160;&#160;&#160;&#8211;27.77</font></div></td> </tr> </table>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse25false0rr_PerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="font-style:italic;display:inline;font-family:times new roman;font-size:10pt;font-weight:bold;" >Average Annual Total Returns for the Periods Ended December 31, 2010</font></div></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c -Subsection b falsefalse26false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div align="left" style="text-indent:0pt;display:block;margin-left:0pt;margin-right:0pt;" ><font style="display:inline;font-family:times new roman;font-size:10pt;" >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 Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. </font> </div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____). For a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by paragraph (c)(2)(i) (e.g., by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Subsection b falsefalse27false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact vlifx_S000007570Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ </div>falsefalse<div style='display: none;'> ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact vlifx_S000007570Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ </div>truehttp://xbrl.sec.gov/rr/role/PerformanceTableDatafalsefalse020060 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_AverageAnnualReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Return before taxesfalsefalsefalsetruefalse2falsetruefalse00Return after taxes on distributionsfalsefalsefalsetruefalse3falsetruefalse00Return after taxes on distributions and sale of Fund sharesfalsefalsefalsetruefalse4falsetruefalse00<div><b>S&P500 &#174;Index (reflects no deduction for fees, expenses or taxes)</b></div>falsefalsefalsetruefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.25550.2555falsefalsefalsetruefalse2truetruetrue0.25550.2555falsefalsefalsetruefalse3truetruetrue0.16610.1661falsefalsefalsetruefalse4truetruetrue0.15060.1506falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0283-0.0283falsefalsefalsetruefalse2truetruetrue-0.0423-0.0423falsefalsefalsetruefalse3truetruetrue-0.0284-0.0284falsefalsefalsetruefalse4truetruetrue0.02290.0229falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0207-0.0207falsefalsefalsetruefalse2truetruetrue-0.0357-0.0357falsefalsefalsetruefalse3truetruetrue-0.0213-0.0213falsefalsefalsetruefalse4truetruetrue0.01410.0141falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxisvlifx_S000007570MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseValue Line Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMemberfalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberValue Line FundValue Line Fund C000020635Before TaxesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Return before taxesReturn before taxesfalsefalsefalsetruefalse2truetruetrue0.25550.2555falsefalsefalsetruefalse3truetruetrue-0.0283-0.0283falsefalsefalsetruefalse4truetruetrue-0.0207-0.0207falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxisvlifx_S000007570MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseValue Line Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMemberfalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberValue Line FundValue Line Fund C000020635After Taxes on DistributionsStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Return after taxes on distributionsReturn after taxes on distributionsfalsefalsefalsetruefalse2truetruetrue0.25550.2555falsefalsefalsetruefalse3truetruetrue-0.0423-0.0423falsefalsefalsetruefalse4truetruetrue-0.0357-0.0357falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxisvlifx_S000007570MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseValue Line Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMemberfalsefalseValue Line Fund C000020635rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_C000020635Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Salesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberValue Line FundValue Line Fund C000020635After Taxes on Distributions and SalesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Return after taxes on distributions and sale of Fund sharesReturn after taxes on distributions and sale of Fund sharesfalsefalsefalsetruefalse2truetruetrue0.16610.1661falsefalsefalsetruefalse3truetruetrue-0.0284-0.0284falsefalsefalsetruefalse4truetruetrue-0.0213-0.0213falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxisvlifx_S000007570MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseValue Line Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_S000007570Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseS&P 500 ® Indexrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldivlifx_Sp500IndexMemberrr_PerformanceMeasureAxisexplicitMemberValue Line FundShare ClassesS&P 500 ® IndexStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00<div><b>S&P500 &#174;Index (reflects no deduction for fees, expenses or taxes)</b></div>S&P500 &#174;Index (reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse2truetruetrue0.15060.1506falsefalsefalsetruefalse3truetruetrue0.02290.0229falsefalsefalsetruefalse4truetruetrue0.01410.0141falsefalsefalsetruefalseOthernanafalsefalse44Average Annual Total Returns Value Line FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxisvlifx_S000007570MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse125Risk/Return Summary (Value Line Fund)UnKnownUnKnownUnKnownUnKnownfalsetrue