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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName Starboard Investment Trust
Prospectus Date rr_ProspectusDate Sep. 28, 2017
Cavalier Fundamental Growth Fund | Institutional Class Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed On Purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a % of the lesser of amount purchased or redeemed) rr_MaximumDeferredSalesChargeOverOther none
Redemption Fee (as a % of amount redeemed) rr_RedemptionFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 1.00% [1]
Distribution and/or Service (12b1) Fees rr_DistributionAndService12b1FeesOverAssets none [1]
Other Expenses rr_OtherExpensesOverAssets 0.54% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.54% [1]
Less Fee Waiver and/or Expense Limitation rr_FeeWaiverOrReimbursementOverAssets 0.29% [1],[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Limitation rr_NetExpensesOverAssets 1.25% [1]
1 Year rr_ExpenseExampleYear01 $ 127
3 Years rr_ExpenseExampleYear03 458
5 Years rr_ExpenseExampleYear05 812
10 Years rr_ExpenseExampleYear10 1,810
1 Year rr_ExpenseExampleNoRedemptionYear01 127
3 Years rr_ExpenseExampleNoRedemptionYear03 458
5 Years rr_ExpenseExampleNoRedemptionYear05 812
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,810
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress http://www.ncfunds.com/fundpages/872.htm
Annual Return 2013 rr_AnnualReturn2013 8.00%
Annual Return 2014 rr_AnnualReturn2014 8.80%
Annual Return 2015 rr_AnnualReturn2015 (0.03%)
Annual Return 2016 rr_AnnualReturn2016 1.51%
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2017
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 11.77%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest quarterly return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.00%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (9.13%)
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 17, 2013
Cavalier Fundamental Growth Fund | Institutional Class Shares | Before taxes  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 1.51%
Since Inception rr_AverageAnnualReturnSinceInception 5.64% [3]
Cavalier Fundamental Growth Fund | Institutional Class Shares | After taxes on distributions  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 1.41%
Since Inception rr_AverageAnnualReturnSinceInception 5.60% [3]
Cavalier Fundamental Growth Fund | Institutional Class Shares | After taxes on distributions and sale of shares  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 1.17%
Since Inception rr_AverageAnnualReturnSinceInception 4.61% [3]
Cavalier Fundamental Growth Fund | Institutional Class Shares | S&P Global Broad Market Index (reflects no deductions for fees and expenses)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 8.84%
Since Inception rr_AverageAnnualReturnSinceInception 4.86% [3]
Cavalier Fundamental Growth Fund | Class C Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed On Purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a % of the lesser of amount purchased or redeemed) rr_MaximumDeferredSalesChargeOverOther 1.00%
Redemption Fee (as a % of amount redeemed) rr_RedemptionFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 1.00% [1]
Distribution and/or Service (12b1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00% [1]
Other Expenses rr_OtherExpensesOverAssets 0.54% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.54% [1]
Less Fee Waiver and/or Expense Limitation rr_FeeWaiverOrReimbursementOverAssets 0.29% [1],[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Limitation rr_NetExpensesOverAssets 2.25% [1]
1 Year rr_ExpenseExampleYear01 $ 328
3 Years rr_ExpenseExampleYear03 763
5 Years rr_ExpenseExampleYear05 1,325
10 Years rr_ExpenseExampleYear10 2,854
1 Year rr_ExpenseExampleNoRedemptionYear01 228
3 Years rr_ExpenseExampleNoRedemptionYear03 763
5 Years rr_ExpenseExampleNoRedemptionYear05 1,325
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,854
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress http://www.ncfunds.com/fundpages/873.htm
Cavalier Fundamental Growth Fund | Class C Shares | Before taxes  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 0.49%
Since Inception rr_AverageAnnualReturnSinceInception 5.08% [3]
Cavalier Fundamental Growth Fund | Class C Shares | S&P Global Broad Market Index (reflects no deductions for fees and expenses)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 8.84%
Since Inception rr_AverageAnnualReturnSinceInception 4.66% [3]
Cavalier Fundamental Growth Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading
Objective [Heading] rr_ObjectiveHeading
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
Expense [Heading] rr_ExpenseHeading
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
These tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund:
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption
Operating Expenses Caption [Text] rr_OperatingExpensesCaption
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 period, the Fund's portfolio turnover rate was 135.58% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 135.58%
Expense Example [Heading] rr_ExpenseExampleHeading
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption
Strategy [Heading] rr_StrategyHeading

PRINCIPAL INVESTMENT STRATEGIES

Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund's investment sub-advisor, Navellier & Associates, Inc. (the "Sub-Advisor"), seeks to achieve the Fund's investment objective of capital appreciation by principally investing in stocks that the Sub-Advisor believes to have above-average growth potential relative to their peers.  The Sub-Advisor uses a proprietary screening system that incorporates quantitative and fundamental analysis in order to construct the Fund's portfolio. The Fund is considered "diversified" under the Investment Company Act of 1940.

 

The Fund invests principally in common stocks and is not limited in its investments by market capitalization.  The Fund's investments may be issued by both domestic and foreign companies, and investments may be made directly in foreign markets, including emerging markets, as well as indirectly through exchange-traded funds and American Depository Receipts (ADRs).  The Sub-Advisor deems an issuer to be foreign if it is an issuer of securities for which a U.S. market is not the principal trading market.  To the extent the Fund invests in ADRs, it may invest in ADRs sponsored by the issuers of the underlying securities or ADRs not sponsored by the issuers.

 

The Sub-Advisor's screening system for the Fund is composed of three steps.  First, the Sub-Advisor employs quantitative analysis of market and individual stock statistics in order to rank stocks by different measures of risk and reward.  Second, screens based on fundamental variables are applied to the highest ranked stocks, those found to have encouraging risk/reward measures.  This step seeks to highlight investment opportunities by evaluating companies in light their profit margins, earnings growth, and the ratio of price to expected future earnings.  Third, the Sub-Advisor uses a self-developed model to try to design a risk-adjusted portfolio that is diversified across sectors and industries.

 

The Sub-Advisor may sell a portfolio security when its reward/risk measures weaken, the fundamentals of the stock change, to pursue opportunities that the Sub-Advisor believes will be of greater benefit to the Fund, or to rebalance the Fund's portfolio.

 

The Fund may, from time to time, take temporary defensive positions in an attempt to respond to adverse market, economic, political, or other conditions.  During such an unusual set of circumstances, the Fund may hold up to 100% of its portfolio in cash or cash equivalent positions.  When the Fund takes temporary defensive positions, the Fund may not be able to achieve its investment objective.

Risk [Heading] rr_RiskHeading
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The loss of your money is a principal risk of investing in the Fund.  Investments in the Fund are subject to investment risks, including the possible loss of some or the entire principal amount invested.  There can be no assurance that the Fund will be successful in meeting its investment objective.  The Fund will be subject to the following principal risks:

Market Risk.  Market risk refers to the possibility that the value of securities held by the Fund may decline due to daily fluctuations in the market.  Market prices for securities change daily as a result of many factors, including developments affecting the condition of both individual companies and the market in general.  The price of a security may even be affected by factors unrelated to the value or condition of its issuer, including changes in interest rates, economic and political conditions, and general market conditions.  The Fund's performance per share will change daily in response to such factors.

Management Style Risk.  Different types of securities tend to shift into and out of favor with investors depending on market and economic conditions.  The returns from the types of investments purchased by the Fund (e.g., growth stocks) may at times be better or worse than the returns from other types of funds.  Thus, the performance of the Fund may be better or worse than the performance of funds that focus on other types of investments, or that have a broader investment style.

Quantitative Model Risk.  Securities or other investments selected using quantitative methods may perform differently from the market as a whole. There can be no assurance that these methodologies will enable the Fund to achieve its objective.

Common Stock Risk.  The Fund's investments in shares of common stock, both directly and indirectly through the Fund's investment in shares of other investment companies, may fluctuate in value response to many factors, including the activities of the individual issuers whose securities the Fund owns, general market and economic conditions, interest rates, and specific industry changes.  Such price fluctuations subject the Fund to potential losses.  Common stock generally is subordinate to preferred stock and debt securities with respect to the payment of dividends and upon the liquidation or bankruptcy of the issuing company.

Large-Cap Securities Risk.  Stocks of large companies as a group can fall out of favor with the market, causing the Fund to underperform investments that have a greater focus on mid-cap or small-cap stocks.

Small-Cap and Mid-Cap Securities Risk. The Fund may invest in securities of small-cap and mid-cap companies, which involve greater volatility than investing in larger and more established companies.  Small-cap and mid-cap companies can be subject to more abrupt or erratic share price changes than larger, more established companies.  Securities of these types of companies have limited market liquidity, and their prices may be more volatile.

Micro-Cap Securities Risk.  Some of the small companies in which the Fund invests may be micro-cap companies.  Micro-cap stocks may involve substantially greater risks of loss and price fluctuations.  Micro-cap companies carry additional risks because of the tendency of their earnings and revenues to be less predictable, their share prices to be more volatile, and their markets to be less liquid than companies with larger market capitalizations.

Foreign Securities and Emerging Markets Risk.  The Fund and Portfolio Funds may have significant investments in foreign securities, which have investment risks different from those associated with domestic securities.  The value of foreign investments may be affected by the value of the local currency relative to the U.S. dollar, changes in exchange control regulations, application of foreign tax laws, changes in governmental economic or monetary policy, or changed circumstances in dealings between nations.  There may be less government supervision of foreign markets, resulting in non-uniform accounting practices and less publicly available information about issuers of foreign securities.  In addition, foreign brokerage commissions, custody fees, and other costs of investing in foreign securities are often higher than in the United States.  Investments in foreign issues could be affected by other factors not present in the United States, including expropriation, armed conflict, confiscatory taxation, and potential difficulties in enforcing contractual obligations.  In addition to the risks of foreign securities in general, countries in emerging markets are more volatile and can have relatively unstable governments, social and legal systems that do not protect shareholders, economies based on only a few industries, and securities markets that trade a small number of issues which could reduce liquidity.

Currency Risk.  The Fund's indirect and direct exposure to foreign currencies subjects the Fund to the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of short positions, that the U.S. dollar will decline in value relative to the currency being hedged.  Adverse changes in currency exchange rates relative to the U.S. dollar may diminish gains from investments denominated in a foreign currency or may widen existing losses.

Depository Receipts.  The Fund may invest in the securities of foreign issuers in the form of depository receipts or other securities convertible into securities of foreign issuers.  Depository receipts are issued by a bank or trust company and evidence ownership of underlying securities issued by a foreign corporation.  Unsponsored depository receipt programs are organized independently of the issuer of the underlying securities and, consequently, available information concerning the issuer may not be as current as for sponsored depository receipts and the prices of unsponsored depository receipts may be more volatile.  The Fund's investments in depository receipts are generally subject to the same risks as the foreign securities that they evidence or into which they may be converted.

Portfolio Turnover Risk.  The Advisor will sell Portfolio Funds and other securities when it is in the interests of the Fund and its shareholders to do so without regard to the length of time they have been held.  As portfolio turnover may involve paying brokerage commissions and other transaction costs, there could be additional expenses for the Fund.  High rates of portfolio turnover may also result in the realization of short-term capital gains and losses.  Any distributions resulting from such gains will be considered ordinary income for federal income tax purposes.

Investment Advisor Risk.  The Advisor's ability to choose suitable investments has a significant impact on the ability of the Fund to achieve its investment objectives.  The Advisor became a registered investment advisor with the SEC in 2015. The Advisor does not have previous experience managing an investment company registered under the 1940 Act.  The portfolio managers' experience is discussed in the section of this prospectus entitled "Management of the Funds – Investment Advisor."

Risk Lose Money [Text] rr_RiskLoseMoney The loss of your money is a principal risk of investing in the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table provide an indication of the risks of investing in the Fund by showing changes in the Fund's Institutional Class Shares performance from year to year and by showing how the average annual total returns for each class compare to that of a broad-based securities market index.  The Fund's past performance is not necessarily an indication of how the Fund will perform in the future.  Updated information on the Fund's results can be obtained by visiting http://www.ncfunds.com/fundpages/872.htm for the Institutional Class Shares and by visiting http://www.ncfunds.com/fundpages/873.htm for the Class C Shares.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide an indication of the risks of investing in the Fund by showing changes in the Fund's Institutional Class Shares performance from year to year and by showing how the average annual total returns for each class compare to that of a broad-based securities market index.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

During the periods shown in the bar chart above the Fund's highest quarterly return was 8.00% (quarter ended December 31, 2013) and the Fund's lowest quarterly return was -9.13% (quarter ended September 30, 2015). The Fund's year-to-date return as of June 30, 2017 (the end of the most recent calendar quarter) was 11.77%.

Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns Periods Ended December 31, 2016
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown and are not applicable to investors who hold Fund shares through tax-deferred arrangements such as a 401(k) plan or an individual retirement account (IRA).
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown for only one class of shares and after-tax returns will vary for other classes.

Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
[1] The expense information in the table has been restated to reflect current fees rather than the fees in effect during the previous fiscal year.
[2] The Advisor has entered into an Expense Limitation Agreement with the Fund under which it has agreed to waive or reduce its fees and to assume other expenses of the Fund, if necessary, in an amount that limits the Fund's annual operating expenses (exclusive of interest, taxes, brokerage fees and commissions, extraordinary expenses, acquired fund fees and expenses, and payments under the Rule 12b-1 distribution plan) to not more than 1.25% of the average daily net assets of the Fund for Institutional and Class C shares. Net annual operating expenses for the Fund may exceed these limits to the extent that it incurs expenses enumerated above as exclusions. The Expense Limitation Agreement runs through September 30, 2018, and may not be terminated prior to that date except via action of the Trust's board of trustees. The Advisor cannot recoup from the Fund any amounts paid by the Advisor under the Expense Limitation Agreement.
[3] The Institutional Class Shares began operating on October 17, 2013. The Class C Shares began operating on November 4, 2013. The performance of the Fund is attributable to its previous investment adviser until July 31, 2015.