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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Mar. 31, 2016
Registrant Name dei_EntityRegistrantName Value Line Small Cap Opportunities Fund, Inc.
Central Index Key dei_EntityCentralIndexKey 0000895429
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jul. 29, 2016
Document Effective Date dei_DocumentEffectiveDate Aug. 01, 2016
Prospectus Date rr_ProspectusDate Aug. 01, 2016
Value Line Small Cap Opportunities Fund, Inc.  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading
Value Line Small Cap Opportunities Fund, Inc.
Objective [Heading] rr_ObjectiveHeading
Investment objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Value Line Small Cap Opportunities Fund, Inc. (the “Fund”) is long-term growth of capital.
Expense [Heading] rr_ExpenseHeading
Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. There are no shareholder fees (fees paid directly from your investment) when you buy and sell shares of the Fund.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination July 31, 2017
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading
Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when 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 for the Investor Class and the Institutional Class was 17% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 17.00%
Expense Example [Heading] rr_ExpenseExampleHeading
Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the 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, that the Fund’s operating expenses remain the same and that the fee waiver and expense reimbursement is in place through July 31, 2017 only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading
Principal investment strategies of the Fund
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, EULAV Asset Management (the “Adviser”) invests at least 80% of the Fund’s assets in stocks of U.S. companies with small market capitalizations (the “80% Policy”). A portion of the Fund’s assets may also be invested in stocks of U.S. mid-market capitalization companies.
 
The Adviser defines “stocks of U.S. companies” as companies that do business in the U.S., are organized in the U.S. or whose stock is traded on a U.S. exchange or over-the-counter market. Although there is not a universal definition of a “small market capitalization company,” the Adviser uses Lipper Inc.’s definition to determine if a company is a small market capitalization company. Lipper Inc. (an independent firm unaffiliated with the Adviser) considers a company to have a small market capitalization if its market capitalization is below the 85th percentile of the aggregate capitalization of all the companies in the Russell 3000 Index. Both the market capitalizations of the companies in the index and the composition of the index change with market conditions. A company’s categorization is based on its market capitalization at the time of investment by the Fund and, as of June 30, 2016, the small market capitalization ceiling is $6.2 billion. The 80% policy can be changed without shareholder approval upon at least 60 days’ prior written notice. The Adviser considers a company to be mid-cap if it has a market capitalization of less than $18.0 billion and it is not a small market capitalization company.
 
While the Fund is actively managed by the Adviser, the Adviser relies generally on the rankings of companies by the Value Line Timeliness™ Ranking System or the Value Line Performance™ Ranking System (the “Ranking Systems”) in selecting securities for purchase or sale. The Ranking Systems are proprietary quantitative systems that compare 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 consists of approximately 1,700 stocks of large-, mid- and small-market capitalization companies for the Value Line Timeliness Ranking System and approximately 2,900 stocks of smaller and mid-sized capitalization companies for the Value Line Performance Ranking System. The common stocks in which the Fund generally, as measured by the number and total value of purchases, invests are selected from those U.S. securities ranked 1, 2 or 3 by either Ranking System, but the Fund may also invest in other common stocks which evidence strong earnings or stock price momentum.
 
As described above, the Adviser relies generally on the rankings of companies by the Ranking Systems 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 taking into account the potential risk and reward of each investment. The Adviser may sell securities for a variety of reasons, such as to secure gains, limit losses or redeploy assets into more promising opportunities.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration
Under normal circumstances, EULAV Asset Management (the “Adviser”) invests at least 80% of the Fund’s assets in stocks of U.S. companies with small market capitalizations (the “80% Policy”). A portion of the Fund’s assets may also be invested in stocks of U.S. mid-market capitalization companies.
Risk [Heading] rr_RiskHeading
Principal risks of investing in the Fund
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
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.
 
 ■
Market Risk. The chief risk that you assume when investing in the Fund is market risk, which is 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.
   
 ■  Equity Securities Risk. Equity securities represent ownership in a corporation and their prices fluctuate for a number of reasons including issuer-specific events, market perceptions and general movements in the equity markets. The resulting fluctuation in the price of equity securities may take the form of a drastic movement or a sustained trend. If an issuer is liquidated or declares bankruptcy, the claims of owners of bonds will take precedence over the claims of owners of common stocks. Historically, the prices of equity securities have fluctuated more than bond prices.
■
Small Capitalization Companies Risk. Investing in the securities of a small or micro capitalization company poses greater risk than investing in larger, more established companies. Small or micro capitalization companies often have more volatile market prices, less capital, a shorter history of operations, and less experienced management than larger companies.
   
■
Illiquidity Risk. Certain securities may be difficult or impossible to sell at the time and price that the Fund would like when there is little or no active trading market. If a security cannot be sold by the Fund at a favorable time and price, the Fund may have to lower the price, sell other securities instead, or forgo an investment opportunity in order to obtain liquidity. This could have a negative effect on the Fund’s performance.
 
■
Ranking Systems Risk. The Adviser’s use of the results of the Ranking Systems in managing the Fund involves the risk that the Ranking Systems may not have the predictive qualities anticipated by the Adviser or that over certain periods of time the price of securities not covered by the Ranking Systems, or lower ranked securities, may appreciate to a greater extent than those securities in the Fund’s portfolio.
   
■
Active Management Risk. Because the Fund is actively managed, its investment return depends on the ability of the Adviser to manage the Fund’s portfolio successfully. There can be no guarantee that the Adviser’s investment strategies will produce the desired results.
 
 
■
 Cyber Security Risk. As the use of technology becomes more prevalent in the course of business, the Fund becomes more susceptible to operational, financial and information security risks resulting from cyber-attacks and/or technological malfunctions. Successful cyber-attacks and/or technological malfunctions affecting the Fund or its service providers can result in, among other things, financial losses to the Fund and its shareholders, the inability to process transactions with shareholders or other parties and the release of private shareholder information or confidential Fund information. While measures have been developed which are designed to reduce the risks associated with cyber security, there are inherent limitations in such measures and there is no guarantee those measures will be effective, particularly since the Fund does not directly control the cyber security measures of its service providers, financial intermediaries and companies in which it invests or with which it does business.
 
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 23.
Risk Lose Money [Text] rr_RiskLoseMoney
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.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution
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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading
Fund performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
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 Investor Class 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 Russell 2000 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. No performance is shown for Institutional Class shares because this class had not completed a full calendar year of operations at December 31, 2015. Updated performance information is available at: www.vlfunds.com.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns
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 Investor Class 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. 
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress
www.vlfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture
The Fund’s past performance (before and after taxes) is not necessarily an indication of how it will perform in the future.
Bar Chart [Heading] rr_BarChartHeading
Total Returns of Investor Class (before taxes) as of 12/31 each year (%)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: Q2 2009 +16.67%
Worst Quarter: Q4 2008 –25.60%
 
As of June 30, 2016, the Fund had a year-to-date total return of 3.88%.
 
After-tax returns for Investor Class shares included 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 (“IRAs”). No performance is shown for Institutional Class shares because this class had not completed a full calendar year of operations at December 31, 2015.
Performance Table Heading rr_PerformanceTableHeading
Average annual total returns for periods ended December 31, 2015
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate
After-tax returns for Investor Class shares included in the table below are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred
Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”). 
Value Line Small Cap Opportunities Fund, Inc. | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol VLEOX
Management Fee rr_ManagementFeesOverAssets 0.75%
Distribution and Services (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.25%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.25%
Less: Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets none
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.25%
1 Year rr_ExpenseExampleYear01 $ 127
3 Years rr_ExpenseExampleYear03 397
5 Years rr_ExpenseExampleYear05 686
10 Years rr_ExpenseExampleYear10 $ 1,511
2006 rr_AnnualReturn2006 11.95%
2007 rr_AnnualReturn2007 12.38%
2008 rr_AnnualReturn2008 (38.24%)
2009 rr_AnnualReturn2009 24.63%
2010 rr_AnnualReturn2010 21.15%
2011 rr_AnnualReturn2011 7.45%
2012 rr_AnnualReturn2012 16.94%
2013 rr_AnnualReturn2013 36.10%
2014 rr_AnnualReturn2014 6.37%
2015 rr_AnnualReturn2015 1.94%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 3.88%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel
Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.67%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel
Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.60%)
Label rr_AverageAnnualReturnLabel
Return before taxes
1 Year rr_AverageAnnualReturnYear01 1.94%
5 Years rr_AverageAnnualReturnYear05 13.15%
10 Years rr_AverageAnnualReturnYear10 8.08%
Value Line Small Cap Opportunities Fund, Inc. | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol VLEIX
Management Fee rr_ManagementFeesOverAssets 0.75%
Distribution and Services (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 2.72%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 3.47%
Less: Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (2.47%) [1]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.00%
1 Year rr_ExpenseExampleYear01 $ 102
3 Years rr_ExpenseExampleYear03 318
5 Years rr_ExpenseExampleYear05 552
10 Years rr_ExpenseExampleYear10 $ 1,225
Value Line Small Cap Opportunities Fund, Inc. | Return after taxes on distributions | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel
Return after taxes on distributions
1 Year rr_AverageAnnualReturnYear01 (1.14%)
5 Years rr_AverageAnnualReturnYear05 11.55%
10 Years rr_AverageAnnualReturnYear10 7.24%
Value Line Small Cap Opportunities Fund, Inc. | Return after taxes on distributions and sale of Fund shares | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel
Return after taxes on distributions and sale of Fund shares
1 Year rr_AverageAnnualReturnYear01 3.64%
5 Years rr_AverageAnnualReturnYear05 10.53%
10 Years rr_AverageAnnualReturnYear10 6.59%
Value Line Small Cap Opportunities Fund, Inc. | Russell 2000 Index  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes
Reflects no deduction for fees, expenses or taxes
Label rr_AverageAnnualReturnLabel
Russell 2000 Index (Reflects no deduction for fees, expenses taxes)
1 Year rr_AverageAnnualReturnYear01 (4.41%)
5 Years rr_AverageAnnualReturnYear05 9.19%
10 Years rr_AverageAnnualReturnYear10 6.80%
[1] EULAV Asset Management (the "Adviser") and EULAV Securities LLC, the Fund's principal underwriter (the "Distributor"), have agreed to waive certain class-specific fees and/or pay certain class-specific expenses incurred by the Institutional Class so that the Institutional Class bears its class-specific fees and expenses at the same percentage of its average daily net assets as the Investor Class's class-specific fees and expenses (excluding 12b-1 fees and any extraordinary expenses incurred in different amounts by the classes) during the period March 17, 2016 through July 31, 2017 (the "Expense Limitation"). The information regarding the Institutional Class in the table has been restated to reflect the Expense Limitation. The Adviser and the Distributor may subsequently recover from assets attributable to the Institutional Class the reimbursed expenses and/or waived fees (within 3 years after the fiscal year end in which the waiver/reimbursement occurred) to the extent that the Institutional Class's expense ratio is less than the Expense Limitation. The Expense Limitation can be terminated or modified before July 31, 2017 only with the agreement of the Fund's board.