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Altair Smaller Companies Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Altair Smaller Companies Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Altair Smaller Companies Fund (the "Fund") seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Expenses and Fees
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 (the "Shares").
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that that you pay each yearas a percentage of the value of your investment)
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 Total Annual Fund Operating Expenses or in the Example, affect the Fund's performance. Portfolio turnover may vary from year to year, as well as within a year. For the period October 21, 2014 through August 31, 2015 the Fund's portfolio turnover rate was 95% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 95.00%
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 and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Summary of Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets (including borrowing for investment purposes) in equity securities of small or micro-cap companies. Small or micro-cap companies are generally considered to be those whose market capitalization are, at the time the Fund makes an investment, within the range of the market capitalization of companies in the Russell Microcap Index ($30 million to $1.00 billion as of May 29, 2015), the Russell 2000® Index ($177 million to $4.30 billion as of May 29, 2015), or the S&P SmallCap 600 Index ($44 million to $4.54 billion as of October 30, 2015). Securities of companies whose market capitalization no longer meet this definition after purchase may continue to be held by the Fund.


The Fund utilizes a "multi-manager" approach whereby the Fund's assets are allocated to one or more sub-advisers ("Sub-Advisers") in percentages determined at the discretion of the Fund's investment adviser, Altair Advisers LLC (the "Adviser"). The Adviser also monitors Sub-Adviser trading with the dual objectives of maximizing each Sub-Adviser's investment flexibility and assuring that the Fund as a whole complies with its investment restrictions. Otherwise, each Sub-Adviser acts independently from the others and utilizes its own distinct investment style in selecting securities. However, each Sub-Adviser must operate within the constraints of the Fund's investment objective and strategies and the particular investment restrictions applicable to that Sub-Adviser.


The Sub-Advisers will implement a number of different investment strategies and styles within the small and micro-cap universe. The Sub-Advisers will implement one or more of the following investment strategies summarized below:


•  Small or Micro-Cap Growth — A Sub-Adviser following a growth investment style is expected to invest primarily in small or micro-cap companies with consistent or accelerating growth in earnings, revenues, cash flow, and/or other financial metrics.


•  Small or Micro-Cap Value — A Sub-Adviser following a value investment style is expected to invest primarily in small or micro-cap companies that are out of favor and/or undervalued in comparison to their peers or their growth prospects.


•  Small or Micro-Cap Core — A Sub-Adviser following a core investment style is expected to invest in small or micro-cap companies that have both value characteristics and growth characteristics.


•  Tax Loss Harvesting — A Sub-Adviser following a tax loss harvesting style is expected to hold a portfolio of securities that will have a pre-tax return similar to the performance of the S&P SmallCap 600 Index. The Sub-Adviser will seek to generate strong-after tax returns by timing trades to avoid realizing capital gains and to harvest losses when possible. The Fund may use losses generated from the tax loss harvesting Sub-Adviser to offset gains from other Sub-Advisers.


The Fund's Sub-Advisers will invest primarily in equities and equity-related instruments of small and micro-cap companies. Equities and equity-related instruments include common stocks, preferred stocks, convertible securities, sponsored and unsponsored depositary receipts, warrants and rights. The Fund may participate as a purchaser in initial public offerings of securities ("IPOs"). An IPO is a company's first offering of stock to the public. The Fund may also invest in companies that may experience unusual and possibly unique developments, or "special situations", which may create a special opportunity for significant returns. Special situations include: significant technological improvements or important discoveries; reorganizations, recapitalizations or mergers; favorable resolutions of litigation; new management or material changes in company policies; and actual or potential changes in control of a company. The Sub-Advisers may also invest in real estate investment trusts ("REITs"), debt securities, and foreign securities (directly and through depository receipts).
Risk [Heading] rr_RiskHeading Summary of Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

As with all mutual funds, a shareholder is subject to the risk that his or her investment could lose money. The principal risk factors affecting shareholders' investments in the Fund are set forth below.


•  Management Risk. The Fund is subject to the risk of poor stock selection. In other words, the individual stocks in the Fund may not perform as well as expected, and/or the Fund's portfolio management practices do not work to achieve their desired result.


•  Market Risk. The net asset value ("NAV") of the Fund will change with changes in the market value of its portfolio positions. Investors may lose money.


•  Equity Securities Risk. The Fund is designed for investors who can accept the risks of investing in a portfolio with significant holdings of equity securities. Equity securities tend to be more volatile than other investment choices, such as debt and money market instruments. The value of your investment may decrease in response to overall stock market movements or the value of individual securities held by the Fund.


•  Small and Micro-Cap Risk. The securities of small and micro-cap companies may be more volatile in price, have wider spreads between their bid and ask prices, and have significantly lower trading volumes than the securities of larger capitalization companies. As a result, the purchase or sale of more than a limited number of shares of the securities of a smaller company may affect its market price. The Fund may need a considerable amount of time to purchase or sell its positions in these securities. Some small and micro-cap companies are followed by few, if any, securities analysts, and there tends to be less publicly available information about such companies. Their securities generally have even more limited trading volumes and are subject to even more abrupt or erratic market price movements than are mid and large cap securities, and the Fund may be able to deal with only a few market-makers when purchasing and selling securities. Such companies also may have limited markets, financial resources or product lines, may lack management depth, and may be more vulnerable to adverse business or market developments. Smaller company stocks may fall out of favor relative to mid or large cap stocks, which may cause the Fund to underperform other equity funds that focus on mid or large cap stocks.


•  Growth Stock Risk. Growth stocks are typically priced higher than other stocks, in relation to earnings and other measures, because investors believe they have more growth potential. This potential may or may not be realized and, if it is not realized, may result in a loss to the Fund. Growth stock prices also tend to be more volatile than the overall market. Because different types of stocks go out of favor with investors depending on market and economic conditions, the Fund's return may be adversely affected during a market downturn and when growth stocks are out of favor.


•  Value Stock Risk. Value investing involves buying stocks that are out of favor and/or undervalued in comparison to their peers or their prospects for growth. Typically, their valuation levels are less than those of growth stocks. Because different types of stocks go out of favor with investors depending on market and economic conditions, the Fund's return may be adversely affected during a market downturn and when value stocks are out of favor.


•  REIT Risk. REITs may be affected by economic forces and other factors related to the real estate industry. These risks include possible declines in the value of real estate, possible lack of availability of mortgage funds and unexpected vacancies of properties. REITs that invest in real estate mortgages are also subject to prepayment risk. Investing in REITs may involve risks similar to those associated with investing in small capitalization companies. REITs may have limited financial resources, may trade less frequently and in a limited volume and may be subject to more abrupt or erratic price movements than larger company securities. Historically, small capitalization stocks, such as REITs, have been more volatile in price than the larger capitalization stocks included in the S&P 500® Index. The Fund will indirectly bear its proportionate share of any expenses, including management fees, paid by an externally managed REIT in which it invests.


•  Special Situations Risk. The Fund will seek to benefit from "special situations," such as mergers, reorganizations, or other unusual events expected to affect a particular issuer. There is a risk that the "special situation" might not occur or involve longer time frames than originally expected, which could have a negative impact on the price of the issuer's securities and fail to produce gains or produce a loss for the Fund.


•  Non-Diversification Risk. The Fund is non-diversified, which means that it may invest a high percentage of its assets in a limited number of securities. Since the Fund is non-diversified, its NAV and total returns may fluctuate or fall more than a diversified mutual fund.


•  Allocation Risk. The Fund's overall risk level will depend on the market sectors in which the Sub-Advisers are invested. Although the Fund will not concentrate in any industry, because the Fund may have significant weightings in a particular company, industry or market sector, the value of Shares may be affected by events that adversely affect that company, industry or market sector and may fluctuate more than that of a less focused fund.


•  Multi-Manager Dependence Risk. The success of the Fund's investment strategy depends both on the Adviser's ability to select Sub-Advisers and to allocate assets to those Sub-Advisers and on each Sub-Adviser's ability to execute the relevant strategy and select investments for the Fund. The Sub-Advisers' investment styles may not always be complementary, which could affect the performance of the Fund and lead to higher transaction expenses as compared to a fund using a single investment management style.


•  Sub-Adviser and Strategy Concentration Risk. Because the Adviser will not be subject to fixed limitations upon the amount of Fund assets that may be invested with a single Sub-Adviser or in a single investment strategy, the Fund may be more heavily exposed to the investment judgments of one or more Sub-Advisers or the possible increased risk of investing in a limited number of investment strategies.


•  Illiquid Securities Risk. Certain securities, assets or markets can become illiquid at times and negatively impact the price of securities if the Fund were to sell during times of illiquidity.


•  IPO Risk. IPO risk is the risk that the market value of IPO shares will fluctuate considerably due to certain factors, such as the absence of a prior public market, unseasoned trading, the small number of shares available for trading and limited information about the issuer. The purchase of IPO shares may involve high transaction costs. IPO shares are subject to market risk and liquidity risk. When the Fund's asset base is small, a significant portion of the Fund's performance could be attributable to investments in IPOs, because such investments would have a magnified impact on the Fund. As the Fund's assets grow, the effect of the Fund's investments in IPOs on the Fund's performance probably will decline, which could reduce the Fund's performance. Because of the price volatility of IPO shares, the Fund may choose to hold IPO shares for a very short period of time. This may increase the turnover of the Fund's portfolio and may lead to increased expenses to the Fund, such as commissions and transaction costs. In addition, the Adviser cannot guarantee continued access to IPOs.


•  Unseasoned Issuers Risk. Unseasoned issuers may not have an established financial history and may have limited product lines, markets or financial resources. Unseasoned issuers may depend on a few key personnel for management and may be susceptible to losses and risks of bankruptcy. As a result, such securities may be more volatile and difficult to sell.


•  Convertible Securities Risk. Securities that can be converted into common stock, such as certain securities and preferred stock, are subject to the usual risks associated with fixed income investments, such as interest rate risk and credit risk. In addition, because they react to changes in the value of the equity securities into which they will convert, convertible securities are also subject to the risks associated with equity securities.


•  Portfolio Turnover Risk. The Adviser and Sub-Advisers will not consider portfolio turnover rate a limiting factor in making investment decisions consistent with the Fund's investment objective and policies. Therefore, it is possible that the Fund may experience high rates of portfolio turnover. High portfolio turnover will cause the Fund to incur higher brokerage commissions and transaction costs, which could lower the Fund's performance. In addition to lower performance, high portfolio turnover could result in taxable capital gains.


•  New Adviser Risk. The Fund's Sub-Advisers may be newly-formed, newly registered with the SEC and/or have not previously managed a mutual fund. Accordingly, investors in the Fund bear the risk that a Sub-Adviser's inexperience may limit its effectiveness.
Risk Lose Money [Text] rr_RiskLoseMoney As with all mutual funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus The Fund is non-diversified, which means that it may invest a high percentage of its assets in a limited number of securities. Since the Fund is non-diversified, its NAV and total returns may fluctuate or fall more than a diversified mutual fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Fund Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

Because the Fund has less than one full calendar year of performance, no performance information has been included. The Fund evaluates its performance as compared to that of the Russell 2000® Index.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Because the Fund has less than one full calendar year of performance, no performance information has been included.
Altair Smaller Companies Fund | Altair Smaller Companies Fund  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management rr_ManagementFeesOverAssets 0.83% [1]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Total Other Expenses rr_OtherExpensesOverAssets 0.32%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.15%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 117
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 365
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 633
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,398
[1] The Fund is currently only available to clients of the Fund's investment adviser, Altair Advisers LLC (the "Adviser") and to other investors at the Fund's discretion. Investors in the Fund who are also clients of the Adviser will incur additional fees based on the total assets of the client under management with the Adviser. The Adviser does not receive a separate management fee from the Fund, although the Adviser is reimbursed for out-of-pocket expenses in connection with its compliance monitoring of Fund trading, up to 0.01% of the Fund's average daily net assets. The management fee shown above reflects the estimated aggregate fees to be paid by the Fund to the Sub-Advisers for the fiscal year ending August 31, 2016, plus anticipated reimbursements to the Adviser for out-of-pocket expenses. Investors in the Fund who are also clients of the Adviser should review the information provided separately by the Adviser for a discussion of fees and expenses charged by the Adviser.