Class A Class C and Investor Class [Member] Investment Risks - Class A, Class C and Investor Class - Meridian Small Cap Growth Fund |
Jun. 30, 2026 |
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| Small Company Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Small Company Risk — Generally, the smaller the capitalization of a company, the greater the risk associated with an investment in the company. The stock prices of small capitalization and newer companies tend to fluctuate more than those of larger capitalized and/or more established companies and generally have a smaller market for their shares than do large capitalization companies.
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| Growth Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Growth Securities Risk — Because growth securities typically trade at a higher multiple of earnings than other types of securities, the market values of growth securities may be more sensitive to changes in current or expected earnings than the market values of other types of securities. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time.
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| Investment Strategy Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Strategy Risk — The Investment Adviser uses the Fund’s principal investment strategies and other investment strategies to seek to achieve the Fund’s investment objective of long-term growth of capital by investing primarily in equity securities of small capitalization companies. There is no assurance that the Investment Adviser’s investment strategies or securities selection method will achieve that investment objective.
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| Market Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk — The value of the Fund’s investments will fluctuate in response to the activities of individual companies and general stock market and economic conditions. As a result, the value of your investment in the Fund may be more or less than your purchase price.
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| Securities Lending Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Securities Lending Risk — The Fund may engage in securities lending. Securities lending involves the risk that the Fund may lose money because the borrower of the loaned securities fails to return the securities in a timely manner or at all. The Fund could also lose money in the event of a decline in the value of collateral provided for loaned securities or a decline in the value of any investments made with cash collateral. These events could also trigger adverse tax consequences for the Fund.
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| Sector Concentration Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Concentration Risk — The Fund may concentrate its investments in companies that are in a single sector or related sector. Concentrating investments in a single sector may make the Fund more susceptible to adverse economic, business, regulatory or other developments affecting that sector. If an economic downturn occurs in a sector in which the Fund’s investments are concentrated, the Fund may perform poorly during that period. The Fund anticipates it will typically invest a significant portion of its assets in the industrials sector and the health care sector and, therefore, the Fund’s performance could be negatively impacted by events affecting these sectors.
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| Healthcare Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Healthcare Sector Risk — The Fund anticipates it will typically invest a significant portion of its assets in the healthcare sector and, therefore, the Fund’s performance could be negatively impacted by events affecting the healthcare sector. The health care sector is subject to extensive government regulation and its profitability can be adversely affected by, among other things, restrictions on government reimbursement for medical expenses, rising costs of medical products and services, and increased emphasis on the delivery of healthcare through outpatient services.
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| Equity Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Securities Risk — Equity securities fluctuate in price and value in response to many factors including historical and prospective earnings of the issuer and its financial condition, the value of its assets, general economic conditions, interest rates, investors’ perceptions, market liquidity, natural disasters and the spread of infectious disease or other public health issues.
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| Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund may lose money |
| Risk Not Insured Depository Institution [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | is not a deposit of a bank or insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |