485BPOS

Filed with the U.S. Securities and Exchange Commission on January 7, 2019

1933 Act Registration File No. 333-179562

1940 Act File No. 811-22668

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM N‑1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	☒
Pre‑Effective Amendment No.	☐
Post‑Effective Amendment No. 441	☒
and
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	☒
Amendment No. 442	☒

(Check appropriate box or boxes.)

ETF SERIES SOLUTIONS

(Exact Name of Registrant as Specified in Charter)

615 East Michigan Street, Milwaukee, Wisconsin 53202

(Address of Principal Executive Offices, Zip Code)

(Registrant’s Telephone Number, including Area Code): (414) 765-5586

Michael D. Barolsky, Vice President and Secretary

ETF Series Solutions

c/o U.S. Bank Global Fund Services

777 East Wisconsin Avenue, 10th Floor

Milwaukee, Wisconsin 53202

(Name and Address of Agent for Service)

Copy to:

W. John McGuire

Morgan, Lewis & Bockius LLP

1111 Pennsylvania Avenue, NW

Washington, DC 20004-2541

As soon as practical after the effective date of this Registration Statement

Approximate Date of Proposed Public Offering

It is proposed that this filing will become effective

☒	immediately upon filing pursuant to paragraph (b)
☐	on  pursuant to paragraph (b)
☐	60 days after filing pursuant to paragraph (a)(1)
☐	on  pursuant to paragraph (a)(1)
☐	75 days after filing pursuant to paragraph (a)(2)
☐	on  pursuant to paragraph (a)(2) of Rule 485.

This Post-Effective Amendment (“PEA”) No. 441 to the Trust’s Registration Statement on Form N-1A hereby incorporates Parts A, B and C from the Trust’s Post-Effective Amendment No. 431 on Form N‑1A filed December 27, 2018.  This PEA No. 441 is filed for the sole purpose of submitting the XBRL exhibit for the risk/return summary first provided in Post-Effective Amendment No. 431 to the Trust’s Registration Statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this registration statement under rule 485(b) under the Securities Act and has duly caused this Post-Effective Amendment to its Registration Statement on Form N-1A to be signed below on its behalf by the undersigned, duly authorized, in the City of Milwaukee, State of Wisconsin, on January 7, 2019.

ETF Series Solutions

By:  /s/ Michael D. Barolsky               

Michael D. Barolsky

Vice President and Secretary

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the Registrant’s Registration Statement on Form N-1A has been signed below by the following persons in the capacities indicated on January 7, 2019.

Signature	Title
*/s/ David A. Massart	Trustee
David A. Massart
*/s/ Janet D. Olsen	Trustee
Janet D. Olsen
*/s/ Leonard M. Rush	Trustee
Leonard M. Rush
*/s/ Michael A. Castino	Trustee
Michael A. Castino
*/s/ Paul R. Fearday	President
Paul R. Fearday
*/s/ Kristen M. Weitzel	Treasurer
Kristen M. Weitzel
*By:       /s/ Michael D. Barolsky             Michael D. Barolsky, Attorney-in-Fact pursuant to Powers of Attorney

EXHIBIT INDEX

Exhibit	Exhibit No.
Instance Document	EX-101.INS
Schema Document	EX-101.SCH
Calculation Linkbase Document	EX-101.CAL
Definition Linkbase Document	EX-101.DEF
Label Linkbase Document	EX-101.LAB
Presentation Linkbase Document	EX-101.PRE

XML

Document and Entity Information	Total
Prospectus:
Document Type	485BPOS
Document Period End Date	Aug. 31, 2018
Registrant Name	ETF Series Solutions
Central Index Key	0001540305
Amendment Flag	false
Document Creation Date	Dec. 21, 2018
Document Effective Date	Dec. 31, 2018
Prospectus Date	Dec. 31, 2018
Vident Core U.S. Bond Strategy ETF® | Vident Core U.S. Bond Strategy ETF
Prospectus:
Trading Symbol	VBND
Vident Core U.S. Equity Fund® | Vident Core U.S. Equity Fund
Prospectus:
Trading Symbol	VUSE
Vident International Equity Fund® | Vident International Equity Fund
Prospectus:
Trading Symbol	VIDI
Deep Value ETF | Deep Value ETF
Prospectus:
Trading Symbol	DVP
Loncar Cancer Immunotherapy ETF | Loncar Cancer Immunotherapy ETF
Prospectus:
Trading Symbol	CNCR
Loncar China BioPharma ETF | Loncar China BioPharma ETF
Prospectus:
Trading Symbol	CHNA

XML

Vident Core U.S. Bond Strategy ETF®

Vident Core U.S. Bond Strategy ETF®

Investment Objective

The Vident Core U.S. Bond Strategy ETF (the “Fund” or the “U.S. Bond Fund”) seeks to track the performance, before fees and expenses, of the Vident Core U.S. Bond Index^TM (the “Index” or the “U.S. Bond Index”).

Fees and Expenses of the Fund

The following table describes the fees and expenses you may pay if you buy and hold shares of the Fund (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares. 

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Vident Core U.S. Bond Strategy ETF® Vident Core U.S. Bond Strategy ETF
Management Fees	0.41%	[1]
Distribution and/or Service (12b-1) Fees	none
Other Expenses	none
Acquired Fund Fees and Expenses	0.02%	[2]
Total Annual Fund Operating Expenses	0.43%

Expense Example

The following example is intended to help retail investors compare the cost of investing in the Fund with the cost of investing in other funds. It illustrates the hypothetical expenses that such investors would incur over various periods if they were to invest $10,000 in the Fund for the time periods indicated and then redeem all of the Shares at the end of those periods. This example assumes that the Fund provides a return of 5% a year and that operating expenses remain the same.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example	1 Year	3 Years	5 Years	10 Years
Vident Core U.S. Bond Strategy ETF® | Vident Core U.S. Bond Strategy ETF | USD ($)	44	138	241	542

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 rate may indicate higher transaction costs and may result in higher taxes when 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 324% of the average value of its portfolio.

Principal Investment Strategies of the Fund

The Fund employs a “passive management” – or indexing – investment approach designed to track the performance of the Index.

The Vident Core U.S. Bond Index^TM

The Vident Core U.S. Bond Index^TM (Bloomberg:VUBDX) seeks to improve the overall mix of credit quality, interest rate and yield as compared to traditional U.S. core bond indices. The Index diversifies interest rate and credit risks across all core U.S. bond sectors, including U.S. Treasuries, U.S. agency securities, mortgage backed securities (“MBS”), and investment-grade corporate bonds, as well as non-core fixed income sectors such as high-yield corporate bonds (also known as “junk bonds”) and Treasury Inflation-Protected Securities (“TIPS”). While diversification among sectors is an important factor that will drive the risk/return profile of the strategy, another source of risk management is derived from the rules-based process that systematically over- or under-weights each sector based on valuations of each sector, historical relative valuations across sectors, sector default rates, macroeconomics and other quantitative factors. Within the investment grade and high yield corporate sectors, the strategy seeks to improve corporate bond exposures by screening for companies with relatively stronger leadership, governance, and creditworthiness factors. Within each sector, individual bonds are weighted based on a combination of yield, duration (i.e., interest rate sensitivity), creditworthiness, leadership, and governance factors, rather than amount of debt/bonds outstanding, a common approach of traditional bond indices. The Index also seeks to improve liquidity by eliminating small issues and non-U.S. issuers.

The Index limits exposure to each of the high-yield corporate bonds and TIPS sectors to 20% and 15% of the Index, respectively. The Index will generally have an effective duration of three to seven years and will generally have an average credit quality of investment grade.

All rules are systematized and rely on data available at the end of each rebalancing period. The Index is rebalanced monthly and reconstituted quarterly in January, April, July, and October.

The Index was created in 2015 by Vident Financial, LLC, the Index Provider, for use by the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the bonds that make up the Index. The Fund expects to use a “replication” strategy to achieve its investment objective, meaning it may invest in all of the component securities of the Index, but may, when the sub-adviser believes it is in the best interests of the Fund, use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole.

The Fund may utilize the “To Be Announced” (“TBA”) market for MBS investments. The TBA market allows investors to gain exposure to MBS with certain broad characteristics (maturity, coupon, age) without taking delivery of the actual securities until the settlement day which is once every month. In addition, the Fund may utilize the TBA roll market, in which one sells, in the TBA market, the security for current month settlement, while simultaneously committing to buy the same TBA security for next month settlement. The Fund may utilize the TBA roll market for extended periods of time without taking delivery of the physical securities.

Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of collateral held from securities lending) will be invested in the component securities of the Index and investments that have economic characteristics that are substantially identical to the economic characteristics of such component securities (such as TBA securities). Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Principal Risks of Investing in the Fund

The principal risks of investing in the Fund are summarized below. As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

n Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security before its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income.

n Cash Redemption Risk. The Fund’s investment strategy may require it to redeem shares for cash or to otherwise include cash as part of its redemption proceeds. The Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used.

n Credit Risk. Debt issuers and other counterparties may not honor their obligations or may have their debt downgraded by ratings agencies.

n Extension Risk. During periods of rising interest rates, certain debt obligations will be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Fund’s income and potentially in the value of the Fund’s investments.

n Government Obligations Risk. No assurance can be given that the U.S. government will provide financial support to U.S. government-sponsored agencies or instrumentalities where it is not obligated to do so by law, such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). Securities issued by Fannie Mae and Freddie Mac have historically been supported only by the discretionary authority of the U.S. government. While the U.S. government provides financial support to various U.S. government-sponsored agencies and instrumentalities, such as Fannie Mae and Freddie Mac, no assurance can be given that it will always do so. In September 2008, at the direction of the U.S. Department of the Treasury, Fannie Mae and Freddie Mac were placed into conservatorship under the Federal Housing Finance Agency (“FHFA”), an independent regulator, and they remain in such status as of the date of this Prospectus. The U.S. government also took steps to provide additional financial support to Fannie Mae and Freddie Mac.

n High-Yield Securities Risk. High-yield securities (also known as “junk bonds”) carry a greater degree of risk and are considered speculative by the major credit rating agencies. High-yield securities may be issued by companies that are restructuring, are smaller and less creditworthy, or are more highly indebted than other companies. This means that they may have more difficulty making scheduled payments of principal and interest. Changes in the value of high-yield securities are influenced more by changes in the financial and business position of the issuing company than by changes in interest rates when compared to investment grade securities. High-yield securities have greater volatility because there is less certainty that principal and interest payments will be made as scheduled. The Fund’s investments in high-yield securities expose it to a substantial degree of credit risk. These investments are considered speculative under traditional investment standards. Prices of high-yield securities will rise and fall primarily in response to actual or perceived changes in the issuer’s financial health, although changes in market interest rates also will affect prices. High-yield securities may experience reduced liquidity and sudden and substantial decreases in price.

n Interest Rate Risk. An increase in interest rates may cause the value of fixed-income securities held by the Fund to decline. The Fund may be subject to a greater risk of rising interest rates due to the current period of historically low rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives.

n Issuer-Specific Risk. Issuer-specific events, including changes in the financial condition of an issuer, can have a negative impact on the value of the Fund.

n Liquidity Risk. Liquidity risk exists when particular investments are difficult to purchase or sell. This can reduce the Fund’s returns because the Fund may be unable to transact at advantageous times or prices.

n Market Risk. The trading prices of debt securities and other instruments fluctuate in response to a variety of factors. The Fund’s net asset value (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

n Mortgage- and Asset-Backed Securities Risk. The Fund may invest in U.S. government agency-backed mortgage- and asset-backed securities. Mortgage- and asset-backed securities are subject to interest rate risk. Modest movements in interest rates (both increases and decreases) may quickly and significantly reduce the value of certain types of these securities. When interest rates fall, mortgage- and asset-backed securities may be subject to prepayment risk. When interest rates rise, certain types of mortgage- and asset-backed securities are subject to extension risk. Mortgage- and asset-backed securities can also be subject to the risk of default on the underlying residential or commercial mortgage(s) or other assets.

n Passive Investment Risk. The Fund invests in the securities included in, or representative of, its Index regardless of their investment merit. The Fund does not attempt to outperform its Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to its Index.

n Portfolio Turnover Risk. The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

n Prepayment Risk. This is the risk that a borrower will prepay some or the entire principal owed to the Fund. If that happens, the Fund may have to replace the security by investing the proceeds in a security with a lower yield. This could reduce the share price and income distributions of the Fund.

n Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors.

n Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

n TBA Securities and Rolls Risk. TBA transactions are subject to increased credit risk and increased overall investment exposure. TBA rolls involve the risk that the Fund’s counterparty will be unable to deliver the mortgage-backed securities underlying the TBA roll at the fixed time. If the buyer files for bankruptcy or becomes insolvent, the buyer or its representative may ask for and receive an extension of time to decide whether to enforce the Fund’s repurchase obligation. In addition, the Fund earns interest by investing the transaction proceeds during the roll period. TBA roll transactions may have the effect of creating leverage in the Fund’s portfolio.

n Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Performance

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for the calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Performance information is also available on the Fund’s website at www.videntfinancialsolutions.com or by calling the Fund toll free at 1-800-617-0004.

Calendar Year Total Returns

For the year-to-date period ended September 30, 2018, the Fund’s total return was -2.14%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 3.06% for the quarter ended March 31, 2016, and the lowest quarterly return was -3.45% for the quarter ended December 31, 2016.

Average Annual Total Returns For the Periods Ended December 31, 2017

Average Annual Returns - Vident Core U.S. Bond Strategy ETF®	Label	Average Annual Returns, 1 Year		Average Annual Returns, Since Inception		Average Annual Returns, Inception Date
Vident Core U.S. Bond Strategy ETF	Return Before Taxes	2.85%		1.56%		Oct. 15, 2014
After Taxes on Distributions | Vident Core U.S. Bond Strategy ETF	Return After Taxes on Distributions	1.96%		0.67%
After Taxes on Distributions and Sale of Fund Shares | Vident Core U.S. Bond Strategy ETF	Return After Taxes on Distributions and Sale of Fund Shares	1.61%		0.80%
Vident Core U.S. Bond Index/Vident Core U.S. Bond Strategy Index (reflects no deduction for fees, expenses, or taxes)	Vident Core U.S. Bond Index/Vident Core U.S. Bond Strategy Index (reflects no deduction for fees, expenses, or taxes)	3.59%	[1]	2.53%	[1]	Oct. 15, 2014
FTSE Broad Investment Grade Bond Index (reflects no deduction for fees, expenses, or taxes)	FTSE Broad Investment Grade Bond Index (reflects no deduction for fees, expenses, or taxes)	3.60%		2.09%		Oct. 15, 2014

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Shares” may be higher than the other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

[1] Restated to reflect the Fund's contractual management fee effective January 31, 2018.

[2] Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights section of the Prospectus, which reflects only the operating expenses of the Fund and does not include acquired fund fees and expenses.

[1] Effective January 6, 2016, the Fund's investment objective changed to track the performance, before fees and expenses, of the Vident Core U.S. Bond Index. Prior to January 6, 2016, the Fund's investment objective was to track the price and total return performance, before fees and expenses, of the Vident Core U.S. Bond Strategy Index. Performance shown for periods prior to January 6, 2016 is that of the Vident Core U.S. Bond Strategy Index.

XML

Label

Element

Value

Vident Core U.S. Bond Strategy ETF®

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Vident Core U.S. Bond Strategy ETF®

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Vident Core U.S. Bond Strategy ETF (the “Fund” or the “U.S. Bond Fund”) seeks to track the performance, before fees and expenses, of the Vident Core U.S. Bond Index^TM (the “Index” or the “U.S. Bond Index”).

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold shares of the Fund (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares. 

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)

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 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 324% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

324.00%

Expense Exchange Traded Fund Commissions [Text]

rr_ExpenseExchangeTradedFundCommissions

This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect the Fund’s contractual management fee effective January 31, 2018.

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights section of the Prospectus, which reflects only the operating expenses of the Fund and does not include acquired fund fees and expenses.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help retail investors compare the cost of investing in the Fund with the cost of investing in other funds. It illustrates the hypothetical expenses that such investors would incur over various periods if they were to invest $10,000 in the Fund for the time periods indicated and then redeem all of the Shares at the end of those periods. This example assumes that the Fund provides a return of 5% a year and that operating expenses remain the same.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

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

The Fund employs a “passive management” – or indexing – investment approach designed to track the performance of the Index.

The Vident Core U.S. Bond Index^TM

The Vident Core U.S. Bond Index^TM (Bloomberg:VUBDX) seeks to improve the overall mix of credit quality, interest rate and yield as compared to traditional U.S. core bond indices. The Index diversifies interest rate and credit risks across all core U.S. bond sectors, including U.S. Treasuries, U.S. agency securities, mortgage backed securities (“MBS”), and investment-grade corporate bonds, as well as non-core fixed income sectors such as high-yield corporate bonds (also known as “junk bonds”) and Treasury Inflation-Protected Securities (“TIPS”). While diversification among sectors is an important factor that will drive the risk/return profile of the strategy, another source of risk management is derived from the rules-based process that systematically over- or under-weights each sector based on valuations of each sector, historical relative valuations across sectors, sector default rates, macroeconomics and other quantitative factors. Within the investment grade and high yield corporate sectors, the strategy seeks to improve corporate bond exposures by screening for companies with relatively stronger leadership, governance, and creditworthiness factors. Within each sector, individual bonds are weighted based on a combination of yield, duration (i.e., interest rate sensitivity), creditworthiness, leadership, and governance factors, rather than amount of debt/bonds outstanding, a common approach of traditional bond indices. The Index also seeks to improve liquidity by eliminating small issues and non-U.S. issuers.

The Index limits exposure to each of the high-yield corporate bonds and TIPS sectors to 20% and 15% of the Index, respectively. The Index will generally have an effective duration of three to seven years and will generally have an average credit quality of investment grade.

All rules are systematized and rely on data available at the end of each rebalancing period. The Index is rebalanced monthly and reconstituted quarterly in January, April, July, and October.

The Index was created in 2015 by Vident Financial, LLC, the Index Provider, for use by the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the bonds that make up the Index. The Fund expects to use a “replication” strategy to achieve its investment objective, meaning it may invest in all of the component securities of the Index, but may, when the sub-adviser believes it is in the best interests of the Fund, use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole.

The Fund may utilize the “To Be Announced” (“TBA”) market for MBS investments. The TBA market allows investors to gain exposure to MBS with certain broad characteristics (maturity, coupon, age) without taking delivery of the actual securities until the settlement day which is once every month. In addition, the Fund may utilize the TBA roll market, in which one sells, in the TBA market, the security for current month settlement, while simultaneously committing to buy the same TBA security for next month settlement. The Fund may utilize the TBA roll market for extended periods of time without taking delivery of the physical securities.

Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of collateral held from securities lending) will be invested in the component securities of the Index and investments that have economic characteristics that are substantially identical to the economic characteristics of such component securities (such as TBA securities). Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The principal risks of investing in the Fund are summarized below. As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

n Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security before its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income.

n Cash Redemption Risk. The Fund’s investment strategy may require it to redeem shares for cash or to otherwise include cash as part of its redemption proceeds. The Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used.

n Credit Risk. Debt issuers and other counterparties may not honor their obligations or may have their debt downgraded by ratings agencies.

n Extension Risk. During periods of rising interest rates, certain debt obligations will be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Fund’s income and potentially in the value of the Fund’s investments.

n Government Obligations Risk. No assurance can be given that the U.S. government will provide financial support to U.S. government-sponsored agencies or instrumentalities where it is not obligated to do so by law, such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). Securities issued by Fannie Mae and Freddie Mac have historically been supported only by the discretionary authority of the U.S. government. While the U.S. government provides financial support to various U.S. government-sponsored agencies and instrumentalities, such as Fannie Mae and Freddie Mac, no assurance can be given that it will always do so. In September 2008, at the direction of the U.S. Department of the Treasury, Fannie Mae and Freddie Mac were placed into conservatorship under the Federal Housing Finance Agency (“FHFA”), an independent regulator, and they remain in such status as of the date of this Prospectus. The U.S. government also took steps to provide additional financial support to Fannie Mae and Freddie Mac.

n High-Yield Securities Risk. High-yield securities (also known as “junk bonds”) carry a greater degree of risk and are considered speculative by the major credit rating agencies. High-yield securities may be issued by companies that are restructuring, are smaller and less creditworthy, or are more highly indebted than other companies. This means that they may have more difficulty making scheduled payments of principal and interest. Changes in the value of high-yield securities are influenced more by changes in the financial and business position of the issuing company than by changes in interest rates when compared to investment grade securities. High-yield securities have greater volatility because there is less certainty that principal and interest payments will be made as scheduled. The Fund’s investments in high-yield securities expose it to a substantial degree of credit risk. These investments are considered speculative under traditional investment standards. Prices of high-yield securities will rise and fall primarily in response to actual or perceived changes in the issuer’s financial health, although changes in market interest rates also will affect prices. High-yield securities may experience reduced liquidity and sudden and substantial decreases in price.

n Interest Rate Risk. An increase in interest rates may cause the value of fixed-income securities held by the Fund to decline. The Fund may be subject to a greater risk of rising interest rates due to the current period of historically low rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives.

n Issuer-Specific Risk. Issuer-specific events, including changes in the financial condition of an issuer, can have a negative impact on the value of the Fund.

n Liquidity Risk. Liquidity risk exists when particular investments are difficult to purchase or sell. This can reduce the Fund’s returns because the Fund may be unable to transact at advantageous times or prices.

n Market Risk. The trading prices of debt securities and other instruments fluctuate in response to a variety of factors. The Fund’s net asset value (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

n Mortgage- and Asset-Backed Securities Risk. The Fund may invest in U.S. government agency-backed mortgage- and asset-backed securities. Mortgage- and asset-backed securities are subject to interest rate risk. Modest movements in interest rates (both increases and decreases) may quickly and significantly reduce the value of certain types of these securities. When interest rates fall, mortgage- and asset-backed securities may be subject to prepayment risk. When interest rates rise, certain types of mortgage- and asset-backed securities are subject to extension risk. Mortgage- and asset-backed securities can also be subject to the risk of default on the underlying residential or commercial mortgage(s) or other assets.

n Passive Investment Risk. The Fund invests in the securities included in, or representative of, its Index regardless of their investment merit. The Fund does not attempt to outperform its Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to its Index.

n Portfolio Turnover Risk. The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

n Prepayment Risk. This is the risk that a borrower will prepay some or the entire principal owed to the Fund. If that happens, the Fund may have to replace the security by investing the proceeds in a security with a lower yield. This could reduce the share price and income distributions of the Fund.

n Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors.

n Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

n TBA Securities and Rolls Risk. TBA transactions are subject to increased credit risk and increased overall investment exposure. TBA rolls involve the risk that the Fund’s counterparty will be unable to deliver the mortgage-backed securities underlying the TBA roll at the fixed time. If the buyer files for bankruptcy or becomes insolvent, the buyer or its representative may ask for and receive an extension of time to decide whether to enforce the Fund’s repurchase obligation. In addition, the Fund earns interest by investing the transaction proceeds during the roll period. TBA roll transactions may have the effect of creating leverage in the Fund’s portfolio.

n Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Risk Lose Money [Text]

rr_RiskLoseMoney

As a result, an investor could lose money over short or long periods of time.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for the calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Performance information is also available on the Fund’s website at www.videntfinancialsolutions.com or by calling the Fund toll free at 1-800-617-0004.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information indicates some of the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-800-617-0004

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.videntfinancialsolutions.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

For the year-to-date period ended September 30, 2018, the Fund’s total return was -2.14%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 3.06% for the quarter ended March 31, 2016, and the lowest quarterly return was -3.45% for the quarter ended December 31, 2016.

Year to Date Return, Label

rr_YearToDateReturnLabel

year-to-date period ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

(2.14%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest quarterly return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.06%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest quarterly return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2016

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.45%)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses, or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Shares” may be higher than the other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Shares” may be higher than the other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns For the Periods Ended December 31, 2017

Vident Core U.S. Bond Strategy ETF® | Vident Core U.S. Bond Index/Vident Core U.S. Bond Strategy Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Vident Core U.S. Bond Index/Vident Core U.S. Bond Strategy Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

3.59%

^[1]

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

2.53%

^[1]

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 15, 2014

Vident Core U.S. Bond Strategy ETF® | FTSE Broad Investment Grade Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

FTSE Broad Investment Grade Bond Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

3.60%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

2.09%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 15, 2014

Vident Core U.S. Bond Strategy ETF® | Vident Core U.S. Bond Strategy ETF

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.41%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

none

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

^[3]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.43%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 44

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

138

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

241

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 542

Annual Return 2015

rr_AnnualReturn2015

0.38%

Annual Return 2016

rr_AnnualReturn2016

2.38%

Annual Return 2017

rr_AnnualReturn2017

2.85%

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

2.85%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

1.56%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 15, 2014

Vident Core U.S. Bond Strategy ETF® | Vident Core U.S. Bond Strategy ETF | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.96%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

0.67%

Vident Core U.S. Bond Strategy ETF® | Vident Core U.S. Bond Strategy ETF | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.61%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

0.80%

[1] Effective January 6, 2016, the Fund's investment objective changed to track the performance, before fees and expenses, of the Vident Core U.S. Bond Index. Prior to January 6, 2016, the Fund's investment objective was to track the price and total return performance, before fees and expenses, of the Vident Core U.S. Bond Strategy Index. Performance shown for periods prior to January 6, 2016 is that of the Vident Core U.S. Bond Strategy Index.

[2] Restated to reflect the Fund's contractual management fee effective January 31, 2018.

[3] Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights section of the Prospectus, which reflects only the operating expenses of the Fund and does not include acquired fund fees and expenses.

XML

Vident Core U.S. Equity Fund®

Vident Core U.S. Equity Fund®

Investment Objective

The Vident Core U.S. Equity Fund (the “Fund” or “U.S. Equity Fund”) seeks to track the performance, before fees and expenses, of the Vident Core U.S. Stock Index^TM (the “Index” or the “U.S. Stock Index”).

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Vident Core U.S. Equity Fund® Vident Core U.S. Equity Fund
Management Fees	0.50%	[1]
Distribution and/or Service (12b-1) Fees	none
Other Expenses	none
Total Annual Fund Operating Expenses	0.50%

Expense Example

The following example is intended to help retail investors compare the cost of investing in the Fund with the cost of investing in other funds. It illustrates the hypothetical expenses that such investors would incur over various periods if they were to invest $10,000 in the Fund for the time periods indicated and then redeem all of the Shares at the end of those periods. This example assumes that the Fund provides a return of 5% a year and that operating expenses remain the same.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example	1 Year	3 Years	5 Years	10 Years
Vident Core U.S. Equity Fund® | Vident Core U.S. Equity Fund | USD ($)	51	160	280	628

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 rate may indicate higher transaction costs and may result in higher taxes when 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 63% of the average value of its portfolio.

Principal Investment Strategies of the Fund

The Fund employs a “passive management” – or indexing – investment approach designed to track the performance of the Index.

The Vident Core U.S. Stock Index^TM

The Index is a rules-based, systematic strategy index comprised of equity securities of issuers domiciled and traded in the United States. The starting universe of eligible companies in the Index consists of U.S.-listed common stock of U.S. companies with market capitalizations of at least $1 billion ($800 million for companies already in the Index), meeting certain minimum liquidity requirements, and not structured as master limited partnerships. The universe of eligible companies is then screened to remove companies with significant accounting risks, governance risks, or other extreme risks, as described below.

The Index uses a forensic accounting model to score and rank companies in the Index universe based on a variety of accounting-related metrics (e.g., revenue recognition, earnings quality, changes in accruals, depreciation to capital expenditures, changes in days sales outstanding). The forensic accounting model eliminates the weakest 10% of companies from the Index universe.

The Index also assesses the corporate governance policies and practices of companies in the Index universe and scores such companies based on the number of such risks identified. Companies within each sector with the worst corporate governance scores are eliminated. Up to 10% of the companies in the Index universe may be eliminated by this screen.

Finally, the Index assesses companies in the Index universe for other extreme risks by identifying extraordinary events that may place shareholders’ capital at risk. Such extreme risks may include:

· A senior executive has been dismissed or faces prosecution for personal misconduct or misrepresentation

· The company has been late in its U.S. Securities and Exchange filings sometime in the past 12 months

· The company has come under investigation, or been subject to fine, settlement, or conviction for issues related to securities fraud, misrepresentation, or deficiencies in investor protection sometime in the past two years

· The company is experiencing difficulties obtaining needed financing or refinancing support

· The company is in breach of existing debt covenants

· The company is under threat of exchange delisting

Any companies flagged for any of the above extreme risks are removed from the Index universe.

The stocks remaining in the resulting universe are then evaluated, scored and ranked utilizing a proprietary multi-factor model, where each factor seeks to score different stock attributes (such as valuation, quality and momentum). At the time of each reconstitution, the stocks in the Index are weighted based on their relative scores, subject to a maximum allocation of 0.5% for any individual stock and certain liquidity thresholds. Overall sector weights are established based on the market capitalization of the universe of U.S.-listed common stocks of U.S. companies at the time of each reconstitution of the Index. The following are the major market sectors included in the Index: communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, and utilities. A sector is comprised of multiple industries. For example, the energy sector is comprised of companies in, among others, the natural gas, oil, and petroleum industries.

All rules are systematized and rely on data available at the end of each rebalancing period. The Index is reconstituted and rebalanced semi-annually in January and July.

The Index was created in 2015 by Vident Financial, LLC, the Index Provider, for use by the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the common stocks that make up the Index. The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it may invest in all of the component securities of the Index, but may, when the sub-adviser believes it is in the best interests of the Fund, use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole.

Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of collateral held from securities lending) will be invested in the component securities of the Index and investments that have economic characteristics that are substantially identical to the economic characteristics of such component securities. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Principal Risks of Investing in the Fund

The principal risks of investing in the Fund are summarized below. As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

n Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, sectors, or companies in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stocks and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

n Large-Capitalization Investing. The Fund invests primarily in the securities of large cap companies. As a result, the Fund’s performance may be adversely affected if securities of large cap companies underperform securities of smaller-capitalization companies or the market as a whole. The securities of large cap companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion.

n Market Risk. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. The Fund’s net asset value (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

n Mid-Capitalization Investing. The Fund may invest in the securities of mid-capitalization companies. As a result, the Fund’s performance may be adversely affected if securities of mid-capitalization companies underperform securities of other capitalization ranges or the market as a whole. Securities of smaller companies are often more vulnerable to market volatility than securities of larger companies.

n Small-Capitalization Investing. The Fund may invest in the securities of small-capitalization companies. As a result, the Fund may be more volatile than funds that invest in larger, more established companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

n Passive Investment Risk. The Fund invests in the securities included in, or representative of, its Index regardless of their investment merit. The Fund does not attempt to outperform its Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to its Index.

n Portfolio Turnover Risk. The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

n Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund may invest a significant portion of its assets in the following sectors and, therefore, the performance of the Fund could be negatively impacted by events affecting each of these sectors.

○ Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability.

○ Financial Sector Risk. This sector can be significantly affected by changes in interest rates, government regulation, the rate of defaults on corporate, consumer and government debt, the availability and cost of capital, and fallout from the housing and sub-prime mortgage crisis. Insurance companies, in particular, may be significantly affected by changes in interest rates, catastrophic events, price and market competition, the imposition of premium rate caps, or other changes in government regulation or tax law and/or rate regulation, which may have an adverse impact on their profitability. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted. In recent years, cyber attacks and technology malfunctions and failures have become increasingly frequent in this sector and have caused significant losses.

○ Health Care Sector Risk. Companies in the health care sector are subject to extensive government regulation and their profitability can be significantly affected by restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure (including price discounting), limited product lines and an increased emphasis on the delivery of healthcare through outpatient services.

○ Industrial Sector Risk. The industrial sector may be affected by changes in the supply of and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors.

○ Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technological advances could have a significant effect on the value of the Fund’s investments. The value of stocks of information technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Stocks of information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

n Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

n Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Performance

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for the calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Performance information is also available on the Fund’s website at www.videntfinancialsolutions.com or by calling the Fund toll free at 1-800-617-0004.

Calendar Year Total Returns

For the year-to-date period ended September 30, 2018, the Fund’s total return was 3.98%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 8.86% for the quarter ended December 31, 2016, and the lowest quarterly return was -10.50% for the quarter ended September 30, 2015.

Average Annual Total Returns For the Periods Ended December 31, 2017

Average Annual Returns - Vident Core U.S. Equity Fund®	Label	Average Annual Returns, 1 Year		Average Annual Returns, Since Inception		Average Annual Returns, Inception Date
Vident Core U.S. Equity Fund	Return Before Taxes	16.44%		9.13%		Jan. 21, 2014
After Taxes on Distributions | Vident Core U.S. Equity Fund	Return After Taxes on Distributions	16.10%		8.76%
After Taxes on Distributions and Sale of Fund Shares | Vident Core U.S. Equity Fund	Return After Taxes on Distributions and Sale of Fund Shares	9.56%		7.10%
Vident Core U.S. Stock Index/Vident Core U.S. Equity Index (reflects no deduction for fees, expenses, or taxes)	Vident Core U.S. Stock Index/Vident Core U.S. Equity Index (reflects no deduction for fees, expenses, or taxes)	16.54%	[1]	8.97%	[1]	Jan. 21, 2014
MSCI US IMI Index – Net (reflects no deduction for fees, expenses, or taxes)	MSCI US IMI Index - Net (reflects no deduction for fees, expenses, or taxes)	20.59%		11.03%		Jan. 21, 2014
Morningstar US Market Total Return Index (reflects no deduction for fees, expenses, or taxes)	Morningstar US Market Total Return Index (reflects no deduction for fees, expenses, or taxes)	21.47%		11.79%		Jan. 21, 2014
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)	S&P 500 Index (reflects no deduction for fees, expenses, or taxes)	21.83%		12.21%		Jan. 21, 2014

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

The Fund changed its benchmark index from the MSCI US IMI Index – Net to the Morningstar US Market Total Return Index because the Index Provider believes that the new benchmark index provides comparable information to investors at a lower cost.

[1] Restated to reflect the Fund's contractual management fee effective January 31, 2018.

[1] Effective January 6, 2016, the Fund's investment objective changed to track the performance, before fees and expenses, of the Vident Core U.S. Stock Index. Prior to January 6, 2016, the Fund's investment objective was to track the price and total return performance, before fees and expenses, of the Vident Core U.S. Equity Index. Performance shown for periods prior to January 6, 2016 is that of the Vident Core U.S. Equity Index.

XML

Label

Element

Value

Vident Core U.S. Equity Fund®

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Vident Core U.S. Equity Fund®

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Vident Core U.S. Equity Fund (the “Fund” or “U.S. Equity Fund”) seeks to track the performance, before fees and expenses, of the Vident Core U.S. Stock Index^TM (the “Index” or the “U.S. Stock Index”).

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.  

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)

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 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 63% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

63.00%

Expense Exchange Traded Fund Commissions [Text]

rr_ExpenseExchangeTradedFundCommissions

This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect the Fund’s contractual management fee effective January 31, 2018.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help retail investors compare the cost of investing in the Fund with the cost of investing in other funds. It illustrates the hypothetical expenses that such investors would incur over various periods if they were to invest $10,000 in the Fund for the time periods indicated and then redeem all of the Shares at the end of those periods. This example assumes that the Fund provides a return of 5% a year and that operating expenses remain the same.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

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

The Fund employs a “passive management” – or indexing – investment approach designed to track the performance of the Index.

The Vident Core U.S. Stock Index^TM

The Index is a rules-based, systematic strategy index comprised of equity securities of issuers domiciled and traded in the United States. The starting universe of eligible companies in the Index consists of U.S.-listed common stock of U.S. companies with market capitalizations of at least $1 billion ($800 million for companies already in the Index), meeting certain minimum liquidity requirements, and not structured as master limited partnerships. The universe of eligible companies is then screened to remove companies with significant accounting risks, governance risks, or other extreme risks, as described below.

The Index uses a forensic accounting model to score and rank companies in the Index universe based on a variety of accounting-related metrics (e.g., revenue recognition, earnings quality, changes in accruals, depreciation to capital expenditures, changes in days sales outstanding). The forensic accounting model eliminates the weakest 10% of companies from the Index universe.

The Index also assesses the corporate governance policies and practices of companies in the Index universe and scores such companies based on the number of such risks identified. Companies within each sector with the worst corporate governance scores are eliminated. Up to 10% of the companies in the Index universe may be eliminated by this screen.

Finally, the Index assesses companies in the Index universe for other extreme risks by identifying extraordinary events that may place shareholders’ capital at risk. Such extreme risks may include:

· A senior executive has been dismissed or faces prosecution for personal misconduct or misrepresentation

· The company has been late in its U.S. Securities and Exchange filings sometime in the past 12 months

· The company has come under investigation, or been subject to fine, settlement, or conviction for issues related to securities fraud, misrepresentation, or deficiencies in investor protection sometime in the past two years

· The company is experiencing difficulties obtaining needed financing or refinancing support

· The company is in breach of existing debt covenants

· The company is under threat of exchange delisting

Any companies flagged for any of the above extreme risks are removed from the Index universe.

The stocks remaining in the resulting universe are then evaluated, scored and ranked utilizing a proprietary multi-factor model, where each factor seeks to score different stock attributes (such as valuation, quality and momentum). At the time of each reconstitution, the stocks in the Index are weighted based on their relative scores, subject to a maximum allocation of 0.5% for any individual stock and certain liquidity thresholds. Overall sector weights are established based on the market capitalization of the universe of U.S.-listed common stocks of U.S. companies at the time of each reconstitution of the Index. The following are the major market sectors included in the Index: communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, and utilities. A sector is comprised of multiple industries. For example, the energy sector is comprised of companies in, among others, the natural gas, oil, and petroleum industries.

All rules are systematized and rely on data available at the end of each rebalancing period. The Index is reconstituted and rebalanced semi-annually in January and July.

The Index was created in 2015 by Vident Financial, LLC, the Index Provider, for use by the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the common stocks that make up the Index. The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it may invest in all of the component securities of the Index, but may, when the sub-adviser believes it is in the best interests of the Fund, use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole.

Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of collateral held from securities lending) will be invested in the component securities of the Index and investments that have economic characteristics that are substantially identical to the economic characteristics of such component securities. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The principal risks of investing in the Fund are summarized below. As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

n Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, sectors, or companies in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stocks and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

n Large-Capitalization Investing. The Fund invests primarily in the securities of large cap companies. As a result, the Fund’s performance may be adversely affected if securities of large cap companies underperform securities of smaller-capitalization companies or the market as a whole. The securities of large cap companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion.

n Market Risk. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. The Fund’s net asset value (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

n Mid-Capitalization Investing. The Fund may invest in the securities of mid-capitalization companies. As a result, the Fund’s performance may be adversely affected if securities of mid-capitalization companies underperform securities of other capitalization ranges or the market as a whole. Securities of smaller companies are often more vulnerable to market volatility than securities of larger companies.

n Small-Capitalization Investing. The Fund may invest in the securities of small-capitalization companies. As a result, the Fund may be more volatile than funds that invest in larger, more established companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

n Passive Investment Risk. The Fund invests in the securities included in, or representative of, its Index regardless of their investment merit. The Fund does not attempt to outperform its Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to its Index.

n Portfolio Turnover Risk. The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

n Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund may invest a significant portion of its assets in the following sectors and, therefore, the performance of the Fund could be negatively impacted by events affecting each of these sectors.

○ Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability.

○ Financial Sector Risk. This sector can be significantly affected by changes in interest rates, government regulation, the rate of defaults on corporate, consumer and government debt, the availability and cost of capital, and fallout from the housing and sub-prime mortgage crisis. Insurance companies, in particular, may be significantly affected by changes in interest rates, catastrophic events, price and market competition, the imposition of premium rate caps, or other changes in government regulation or tax law and/or rate regulation, which may have an adverse impact on their profitability. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted. In recent years, cyber attacks and technology malfunctions and failures have become increasingly frequent in this sector and have caused significant losses.

○ Health Care Sector Risk. Companies in the health care sector are subject to extensive government regulation and their profitability can be significantly affected by restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure (including price discounting), limited product lines and an increased emphasis on the delivery of healthcare through outpatient services.

○ Industrial Sector Risk. The industrial sector may be affected by changes in the supply of and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors.

○ Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technological advances could have a significant effect on the value of the Fund’s investments. The value of stocks of information technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Stocks of information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

n Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

n Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Risk Lose Money [Text]

rr_RiskLoseMoney

As a result, an investor could lose money over short or long periods of time.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for the calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Performance information is also available on the Fund’s website at www.videntfinancialsolutions.com or by calling the Fund toll free at 1-800-617-0004.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information indicates some of the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-800-617-0004

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.videntfinancialsolutions.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

For the year-to-date period ended September 30, 2018, the Fund’s total return was 3.98%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 8.86% for the quarter ended December 31, 2016, and the lowest quarterly return was -10.50% for the quarter ended September 30, 2015.

Year to Date Return, Label

rr_YearToDateReturnLabel

year-to-date period ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

3.98%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest quarterly return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

8.86%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest quarterly return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.50%)

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

The Fund changed its benchmark index from the MSCI US IMI Index – Net to the Morningstar US Market Total Return Index because the Index Provider believes that the new benchmark index provides comparable information to investors at a lower cost.

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses, or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

The Fund changed its benchmark index from the MSCI US IMI Index – Net to the Morningstar US Market Total Return Index because the Index Provider believes that the new benchmark index provides comparable information to investors at a lower cost.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns For the Periods Ended December 31, 2017

Vident Core U.S. Equity Fund® | Vident Core U.S. Stock Index/Vident Core U.S. Equity Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Vident Core U.S. Stock Index/Vident Core U.S. Equity Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

16.54%

^[1]

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

8.97%

^[1]

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 21, 2014

Vident Core U.S. Equity Fund® | MSCI US IMI Index – Net (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

MSCI US IMI Index - Net (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

20.59%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

11.03%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 21, 2014

Vident Core U.S. Equity Fund® | Morningstar US Market Total Return Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Morningstar US Market Total Return Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

21.47%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

11.79%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 21, 2014

Vident Core U.S. Equity Fund® | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

S&P 500 Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

21.83%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

12.21%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 21, 2014

Vident Core U.S. Equity Fund® | Vident Core U.S. Equity Fund

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.50%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.50%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 51

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

160

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

280

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 628

Annual Return 2015

rr_AnnualReturn2015

(6.06%)

Annual Return 2016

rr_AnnualReturn2016

18.71%

Annual Return 2017

rr_AnnualReturn2017

16.44%

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

16.44%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

9.13%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 21, 2014

Vident Core U.S. Equity Fund® | Vident Core U.S. Equity Fund | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

16.10%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

8.76%

Vident Core U.S. Equity Fund® | Vident Core U.S. Equity Fund | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

9.56%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

7.10%

[1] Effective January 6, 2016, the Fund's investment objective changed to track the performance, before fees and expenses, of the Vident Core U.S. Stock Index. Prior to January 6, 2016, the Fund's investment objective was to track the price and total return performance, before fees and expenses, of the Vident Core U.S. Equity Index. Performance shown for periods prior to January 6, 2016 is that of the Vident Core U.S. Equity Index.

[2] Restated to reflect the Fund's contractual management fee effective January 31, 2018.

XML

Vident International Equity Fund®

Vident International Equity Fund®

Investment Objective

The Vident International Equity Fund (the “Fund” or “International Equity Fund”) seeks to track the performance, before fees and expenses, of the Vident Core International Equity Index™ (the “Index” or the “International Equity Index”).

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Vident International Equity Fund® Vident International Equity Fund
Management Fees	0.61%	[1]
Distribution and/or Service (12b-1) Fees	none
Other Expenses	none
Total Annual Fund Operating Expenses	0.61%

Expense Example

The following example is intended to help retail investors compare the cost of investing in the Fund with the cost of investing in other funds. It illustrates the hypothetical expenses that such investors would incur over various periods if they were to invest $10,000 in the Fund for the time periods indicated and then redeem all of the Shares at the end of those periods. This example assumes that the Fund provides a return of 5% a year and that operating expenses remain the same.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example	1 Year	3 Years	5 Years	10 Years
Vident International Equity Fund® | Vident International Equity Fund | USD ($)	62	195	340	762

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 rate may indicate higher transaction costs and may result in higher taxes when 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 66% of the average value of its portfolio.

Principal Investment Strategies of the Fund

The Fund employs a “passive management” – or indexing – investment approach designed to track the performance of the Index.

The Vident Core International Equity Index™

The Index is a rules-based, systematic strategy index comprised of equity securities of issuers in developed and emerging markets outside of the United States. The strategy seeks to apply time-tested investment principles to provide a systematic and optimized investment process that addresses the risks and opportunities of allocating capital in and among international equities.

Country Allocation

Index construction begins by identifying a universe of countries that are deemed to represent the bulk of investable and reliable stock opportunities in the largest and most liquid developed and emerging markets countries located outside of the United States. The Index determines a country’s investability based on factors including the country’s liquidity, accessibility to foreign investors, opportunities for efficient transactions, and capital controls. The Index determines a country’s reliability based on factors including governance, regulatory oversight, market operational efficiency, legal protections for minority and foreign investors and institutional stability. While the number of countries represented in the Index may change from time to time (e.g., at Index reconstitution or rebalance), the number of countries represented in the Index is expected to generally be between 25 and 40.

Each country within the investable universe is assigned a Country Principles Score (“CPS”), which is calculated utilizing a proprietary scoring methodology that seeks to weigh the relative resilience of a country to economic and financial shocks and the relative attractiveness of its investment opportunities. A country’s resilience reflects the capacity of a country’s equity markets to absorb and recover from economic and financial shocks and is measured based on a variety of economic metrics related to its financial capital resources (e.g., the country’s deficit as a percentage of gross domestic product (“GDP”), physical capital resources (e.g., total investment as a percentage of GDP), human resources (e.g., productivity, GDP per capital), and institutional and organizational resources (i.e., measures of legal and corporate rights). A country’s investment opportunity is measured based on short- and long-term changes in the country’s business and regulatory environment and equity market valuations. Allocation across countries is based on an optimization model that seeks to maximize the Index’s overall CPS while ensuring the Index portfolio is liquid, well diversified across countries and regions, and transaction cost and turnover efficient.

Stock Selection

The Index employs a multi-factor model for scoring and ranking stocks listed on a securities exchange within each country in the Index universe. The model combines 20 factors into three distinct factor composites, each seeking to score different stock attributes:

Component	Examples	Weight
Valuation	Price-to-book ratio, cash flow to enterprise value	50%
Quality	Gross profitability, return on invested capital, margin expansion, leverage, debt & equity issuance	30%
Momentum	Total return for past six months	20%

Stocks are excluded from the Index universe if (i) they trade primarily in China, (ii) the stock’s issuer is domiciled in Russia or India and does not have a depositary receipt that meets the Index’s liquidity guidelines, (iii) the stock’s issuer has a market capitalization of less than US$1 billion (US$800 million for stocks already in the Index), or (iv) the stock does not meet certain minimum liquidity requirements.

At the time of each reconstitution, the optimization model weights the remaining stocks to maximize the attractive factor attributes of the stocks subject to the following constraints: (i) a maximum allocation of 0.5% for any individual stock, (ii) certain liquidity thresholds, (iii) a maximum allocation of 7.5% for any individual country, and (iv) sector allocations constrained to remain close to their sector weights in a traditional market capitalization weighted index.

All rules are systematized and rely on data available at the end of each rebalancing period. The Index is reconstituted and rebalanced semi-annually in January and July.

The Index was created in 2015 by Vident Financial, LLC, the Index Provider, for use by the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the common stocks that make up the Index. The Fund expects to use a “replication” strategy to achieve its investment objective, meaning it will invest in all of the component securities of the Index, but may, when the sub-adviser believes it is in the best interests of the Fund, use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole.

Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of collateral held from securities lending) will be invested in the component securities of the Index and investments that have economic characteristics that are substantially identical to the economic characteristics of such component securities. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Principal Risks of Investing in the Fund

The principal risks of investing in the Fund are summarized below. As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

n Capital Controls and Sanctions Risk. Economic conditions, such as volatile currency exchange rates and interest rates, political events, military action and other conditions may, without prior warning, lead to foreign government intervention (including intervention by the U.S. government with respect to foreign governments, economic sectors, foreign companies and related securities and interests) and the imposition of capital controls and/or sanctions, which may also include retaliatory actions of one government against another government, such as seizure of assets. Capital controls and/or sanctions include the prohibition of, or restrictions on, the ability to transfer currency, securities or other assets. Capital controls and/or sanctions may also impact the ability of the Fund to buy, sell or otherwise transfer securities or currency, negatively impact the value and/or liquidity of such instruments, adversely affect the trading market and price for Shares, and cause the Fund to decline in value.

n Currency Exchange Rate Risk. The Fund may invest a relatively large percentage of its assets in investments denominated in non-U.S. currencies or in securities that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investment and the value of your Shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

n Emerging Markets Risk. The Fund may invest in companies organized in emerging market nations. Investments in securities and instruments traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, or regulatory conditions not associated with investments in U.S. securities and instruments or investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Shares and cause the Fund to decline in value.

n Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, sectors or companies in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stocks and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

n Foreign Securities Risk. Investments in non-U.S. securities involve certain risks that may not be present with investments in U.S. securities. For example, investments in non-U.S. securities may be subject to risk of loss due to foreign currency fluctuations or to political or economic instability. Investments in non-U.S. securities also may be subject to withholding or other taxes and may be subject to additional trading, settlement, custodial, and operational risks. These and other factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.

n Geographic Investment Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies of a single country or region, it is more likely to be impacted by events or conditions affecting that country or region.

n Geopolitical Risk. Some countries and regions in which the Fund invests have experienced security concerns, war or threats of war and aggression, terrorism, economic uncertainty, natural and environmental disasters and/or systemic market dislocations that have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S. and world economies and markets generally, each of which may negatively impact the Fund’s investments.

n Large-Capitalization Investing. The Fund may invest in the securities of large-capitalization companies. As a result, the Fund’s performance may be adversely affected if securities of large-capitalization companies underperform securities of smaller-capitalization companies or the market as a whole. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion.

n Market Risk. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. The Fund’s net asset value (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

n Mid-Capitalization Investing. The Fund may invest in the securities of mid-capitalization companies. As a result, the Fund’s performance may be adversely affected if securities of mid-capitalization companies underperform securities of other capitalization ranges or the market as a whole. Securities of smaller companies are often more vulnerable to market volatility than securities of larger companies.

n Passive Investment Risk. The Fund invests in the securities included in, or representative of, its Index regardless of their investment merit. The Fund does not attempt to outperform its Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to its Index.

n Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund may invest a significant portion of its assets in the following sectors and, therefore, the performance of the Fund could be negatively impacted by events affecting each of these sectors.

○ Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability.

○ Financial Sector Risk. This sector can be significantly affected by changes in interest rates, government regulation, the rate of defaults on corporate, consumer and government debt, the availability and cost of capital, and fallout from the housing and sub-prime mortgage crisis. Insurance companies, in particular, may be significantly affected by changes in interest rates, catastrophic events, price and market competition, the imposition of premium rate caps, or other changes in government regulation or tax law and/or rate regulation, which may have an adverse impact on their profitability. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted. In recent years, cyber attacks and technology malfunctions and failures have become increasingly frequent in this sector and have caused significant losses.

○ Industrial Sector Risk. The industrial sector may be affected by changes in the supply of and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors.

○ Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technological advances could have a significant effect on the value of the Fund’s investments. The value of stocks of information technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Stocks of information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

n Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

n Small-Capitalization Investing. The Fund may invest in the securities of small-capitalization companies. As a result, the Fund may be more volatile than funds that invest in larger, more established companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

n Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Performance

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Updated performance information is also available on the Fund’s website at www.videntfinancialsolutions.com or by calling the Fund toll free at 1-800-617-0004.

Calendar Year Total Returns

For the year-to-date period ended September 30, 2018, the Fund’s total return was -7.39%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 10.71% for the quarter ended March 31, 2017, and the lowest quarterly return was -13.57% for the quarter ended September 30, 2015.

Average Annual Total Returns For the Periods Ended December 31, 2017

Average Annual Returns - Vident International Equity Fund®	Label	Average Annual Returns, 1 Year		Average Annual Returns, Since Inception		Average Annual Returns, Inception Date
Vident International Equity Fund	Return Before Taxes	32.87%		5.02%		Oct. 29, 2013
After Taxes on Distributions | Vident International Equity Fund	Return After Taxes on Distributions	32.40%		4.73%
After Taxes on Distributions and Sale of Fund Shares | Vident International Equity Fund	Return After Taxes on Distributions and Sale of Fund Shares	19.40%		4.03%
Vident Core International Equity Index/Vident International Equity Index (reflects no deduction for fees, expenses, or taxes)	Vident Core International Equity Index/Vident International Equity Index (reflects no deduction for fees, expenses, or taxes)	33.15%	[1]	6.06%	[1]	Oct. 29, 2013
MSCI AC World ex USA Index (reflects no deduction for fees, expenses, or taxes)	MSCI AC World ex USA Index (reflects no deduction for fees, expenses, or taxes)	27.19%		4.73%		Oct. 29, 2013
Morningstar Global ex-US Large-Mid Total Return Index (reflects no deduction for fees, expenses, or taxes)	Morningstar Global ex-US Large-Mid Total Return Index (reflects no deduction for fees, expenses, or taxes)	27.05%		4.90%		Oct. 29, 2013

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

The Fund changed its benchmark index from the MSCI AC World ex USA Index to the Morningstar Global ex-US Large-Mid Total Return Index because the Index Provider believes that the new benchmark index provides comparable information to investors at a lower cost.

[1] Restated to reflect the Fund's contractual management fee effective January 31, 2018.

[1] Effective January 6, 2016, the Fund's investment objective changed to track the performance, before fees and expenses, of the Vident Core International Equity Index. Prior to January 6, 2016, the Fund's investment objective was to track the price and total return performance, before fees and expenses, of the Vident International Equity Index. Performance shown for periods prior to January 6, 2016 is that of the Vident International Equity Index.

XML

Label

Element

Value

Vident International Equity Fund®

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Vident International Equity Fund®

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Vident International Equity Fund (the “Fund” or “International Equity Fund”) seeks to track the performance, before fees and expenses, of the Vident Core International Equity Index™ (the “Index” or the “International Equity Index”).

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

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)

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 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 66% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

66.00%

Expense Exchange Traded Fund Commissions [Text]

rr_ExpenseExchangeTradedFundCommissions

This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect the Fund’s contractual management fee effective January 31, 2018.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help retail investors compare the cost of investing in the Fund with the cost of investing in other funds. It illustrates the hypothetical expenses that such investors would incur over various periods if they were to invest $10,000 in the Fund for the time periods indicated and then redeem all of the Shares at the end of those periods. This example assumes that the Fund provides a return of 5% a year and that operating expenses remain the same.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

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

The Fund employs a “passive management” – or indexing – investment approach designed to track the performance of the Index.

The Vident Core International Equity Index™

The Index is a rules-based, systematic strategy index comprised of equity securities of issuers in developed and emerging markets outside of the United States. The strategy seeks to apply time-tested investment principles to provide a systematic and optimized investment process that addresses the risks and opportunities of allocating capital in and among international equities.

Country Allocation

Index construction begins by identifying a universe of countries that are deemed to represent the bulk of investable and reliable stock opportunities in the largest and most liquid developed and emerging markets countries located outside of the United States. The Index determines a country’s investability based on factors including the country’s liquidity, accessibility to foreign investors, opportunities for efficient transactions, and capital controls. The Index determines a country’s reliability based on factors including governance, regulatory oversight, market operational efficiency, legal protections for minority and foreign investors and institutional stability. While the number of countries represented in the Index may change from time to time (e.g., at Index reconstitution or rebalance), the number of countries represented in the Index is expected to generally be between 25 and 40.

Each country within the investable universe is assigned a Country Principles Score (“CPS”), which is calculated utilizing a proprietary scoring methodology that seeks to weigh the relative resilience of a country to economic and financial shocks and the relative attractiveness of its investment opportunities. A country’s resilience reflects the capacity of a country’s equity markets to absorb and recover from economic and financial shocks and is measured based on a variety of economic metrics related to its financial capital resources (e.g., the country’s deficit as a percentage of gross domestic product (“GDP”), physical capital resources (e.g., total investment as a percentage of GDP), human resources (e.g., productivity, GDP per capital), and institutional and organizational resources (i.e., measures of legal and corporate rights). A country’s investment opportunity is measured based on short- and long-term changes in the country’s business and regulatory environment and equity market valuations. Allocation across countries is based on an optimization model that seeks to maximize the Index’s overall CPS while ensuring the Index portfolio is liquid, well diversified across countries and regions, and transaction cost and turnover efficient.

Stock Selection

The Index employs a multi-factor model for scoring and ranking stocks listed on a securities exchange within each country in the Index universe. The model combines 20 factors into three distinct factor composites, each seeking to score different stock attributes:

Component	Examples	Weight
Valuation	Price-to-book ratio, cash flow to enterprise value	50%
Quality	Gross profitability, return on invested capital, margin expansion, leverage, debt & equity issuance	30%
Momentum	Total return for past six months	20%

Stocks are excluded from the Index universe if (i) they trade primarily in China, (ii) the stock’s issuer is domiciled in Russia or India and does not have a depositary receipt that meets the Index’s liquidity guidelines, (iii) the stock’s issuer has a market capitalization of less than US$1 billion (US$800 million for stocks already in the Index), or (iv) the stock does not meet certain minimum liquidity requirements.

At the time of each reconstitution, the optimization model weights the remaining stocks to maximize the attractive factor attributes of the stocks subject to the following constraints: (i) a maximum allocation of 0.5% for any individual stock, (ii) certain liquidity thresholds, (iii) a maximum allocation of 7.5% for any individual country, and (iv) sector allocations constrained to remain close to their sector weights in a traditional market capitalization weighted index.

All rules are systematized and rely on data available at the end of each rebalancing period. The Index is reconstituted and rebalanced semi-annually in January and July.

The Index was created in 2015 by Vident Financial, LLC, the Index Provider, for use by the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the common stocks that make up the Index. The Fund expects to use a “replication” strategy to achieve its investment objective, meaning it will invest in all of the component securities of the Index, but may, when the sub-adviser believes it is in the best interests of the Fund, use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole.

Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of collateral held from securities lending) will be invested in the component securities of the Index and investments that have economic characteristics that are substantially identical to the economic characteristics of such component securities. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The principal risks of investing in the Fund are summarized below. As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

n Capital Controls and Sanctions Risk. Economic conditions, such as volatile currency exchange rates and interest rates, political events, military action and other conditions may, without prior warning, lead to foreign government intervention (including intervention by the U.S. government with respect to foreign governments, economic sectors, foreign companies and related securities and interests) and the imposition of capital controls and/or sanctions, which may also include retaliatory actions of one government against another government, such as seizure of assets. Capital controls and/or sanctions include the prohibition of, or restrictions on, the ability to transfer currency, securities or other assets. Capital controls and/or sanctions may also impact the ability of the Fund to buy, sell or otherwise transfer securities or currency, negatively impact the value and/or liquidity of such instruments, adversely affect the trading market and price for Shares, and cause the Fund to decline in value.

n Currency Exchange Rate Risk. The Fund may invest a relatively large percentage of its assets in investments denominated in non-U.S. currencies or in securities that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investment and the value of your Shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

n Emerging Markets Risk. The Fund may invest in companies organized in emerging market nations. Investments in securities and instruments traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, or regulatory conditions not associated with investments in U.S. securities and instruments or investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Shares and cause the Fund to decline in value.

n Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, sectors or companies in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stocks and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

n Foreign Securities Risk. Investments in non-U.S. securities involve certain risks that may not be present with investments in U.S. securities. For example, investments in non-U.S. securities may be subject to risk of loss due to foreign currency fluctuations or to political or economic instability. Investments in non-U.S. securities also may be subject to withholding or other taxes and may be subject to additional trading, settlement, custodial, and operational risks. These and other factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.

n Geographic Investment Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies of a single country or region, it is more likely to be impacted by events or conditions affecting that country or region.

n Geopolitical Risk. Some countries and regions in which the Fund invests have experienced security concerns, war or threats of war and aggression, terrorism, economic uncertainty, natural and environmental disasters and/or systemic market dislocations that have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S. and world economies and markets generally, each of which may negatively impact the Fund’s investments.

n Large-Capitalization Investing. The Fund may invest in the securities of large-capitalization companies. As a result, the Fund’s performance may be adversely affected if securities of large-capitalization companies underperform securities of smaller-capitalization companies or the market as a whole. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion.

n Market Risk. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. The Fund’s net asset value (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

n Mid-Capitalization Investing. The Fund may invest in the securities of mid-capitalization companies. As a result, the Fund’s performance may be adversely affected if securities of mid-capitalization companies underperform securities of other capitalization ranges or the market as a whole. Securities of smaller companies are often more vulnerable to market volatility than securities of larger companies.

n Passive Investment Risk. The Fund invests in the securities included in, or representative of, its Index regardless of their investment merit. The Fund does not attempt to outperform its Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to its Index.

n Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund may invest a significant portion of its assets in the following sectors and, therefore, the performance of the Fund could be negatively impacted by events affecting each of these sectors.

○ Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of domestic and international economies, interest rates, exchange rates, competition, consumer confidence, changes in demographics and consumer preferences. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and may be strongly affected by social trends and marketing campaigns. These companies may be subject to severe competition, which may have an adverse impact on their profitability.

○ Financial Sector Risk. This sector can be significantly affected by changes in interest rates, government regulation, the rate of defaults on corporate, consumer and government debt, the availability and cost of capital, and fallout from the housing and sub-prime mortgage crisis. Insurance companies, in particular, may be significantly affected by changes in interest rates, catastrophic events, price and market competition, the imposition of premium rate caps, or other changes in government regulation or tax law and/or rate regulation, which may have an adverse impact on their profitability. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted. In recent years, cyber attacks and technology malfunctions and failures have become increasingly frequent in this sector and have caused significant losses.

○ Industrial Sector Risk. The industrial sector may be affected by changes in the supply of and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors.

○ Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technological advances could have a significant effect on the value of the Fund’s investments. The value of stocks of information technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Stocks of information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

n Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

n Small-Capitalization Investing. The Fund may invest in the securities of small-capitalization companies. As a result, the Fund may be more volatile than funds that invest in larger, more established companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

n Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Risk Lose Money [Text]

rr_RiskLoseMoney

As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Updated performance information is also available on the Fund’s website at www.videntfinancialsolutions.com or by calling the Fund toll free at 1-800-617-0004.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information indicates some of the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-800-617-0004

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.videntfinancialsolutions.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

For the year-to-date period ended September 30, 2018, the Fund’s total return was -7.39%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 10.71% for the quarter ended March 31, 2017, and the lowest quarterly return was -13.57% for the quarter ended September 30, 2015.

Year to Date Return, Label

rr_YearToDateReturnLabel

year-to-date period ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

(7.39%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest quarterly return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2017

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

10.71%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest quarterly return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(13.57%)

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

The Fund changed its benchmark index from the MSCI AC World ex USA Index to the Morningstar Global ex-US Large-Mid Total Return Index because the Index Provider believes that the new benchmark index provides comparable information to investors at a lower cost.

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses, or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

The Fund changed its benchmark index from the MSCI AC World ex USA Index to the Morningstar Global ex-US Large-Mid Total Return Index because the Index Provider believes that the new benchmark index provides comparable information to investors at a lower cost.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns For the Periods Ended December 31, 2017

Vident International Equity Fund® | Vident Core International Equity Index/Vident International Equity Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Vident Core International Equity Index/Vident International Equity Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

33.15%

^[1]

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

6.06%

^[1]

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 29, 2013

Vident International Equity Fund® | MSCI AC World ex USA Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

MSCI AC World ex USA Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

27.19%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

4.73%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 29, 2013

Vident International Equity Fund® | Morningstar Global ex-US Large-Mid Total Return Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Morningstar Global ex-US Large-Mid Total Return Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

27.05%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

4.90%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 29, 2013

Vident International Equity Fund® | Vident International Equity Fund

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.61%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.61%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 62

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

195

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

340

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 762

Annual Return 2014

rr_AnnualReturn2014

(2.16%)

Annual Return 2015

rr_AnnualReturn2015

(10.78%)

Annual Return 2016

rr_AnnualReturn2016

8.53%

Annual Return 2017

rr_AnnualReturn2017

32.87%

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.87%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

5.02%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 29, 2013

Vident International Equity Fund® | Vident International Equity Fund | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.40%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

4.73%

Vident International Equity Fund® | Vident International Equity Fund | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

19.40%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

4.03%

[1] Effective January 6, 2016, the Fund's investment objective changed to track the performance, before fees and expenses, of the Vident Core International Equity Index. Prior to January 6, 2016, the Fund's investment objective was to track the price and total return performance, before fees and expenses, of the Vident International Equity Index. Performance shown for periods prior to January 6, 2016 is that of the Vident International Equity Index.

[2] Restated to reflect the Fund's contractual management fee effective January 31, 2018.

XML

Deep Value ETF

Deep Value ETF

Investment Objective

The Deep Value ETF (the “Fund”) seeks to track the price and total return performance, before fees and expenses, of the Deep Value Index (the “Index”).

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Deep Value ETF Deep Value ETF
Management Fees	0.80%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	none
Total Annual Fund Operating Expenses	0.80%
Less Fee Waiver	0.21%
Total Annual Fund Operating Expenses After Fee Waiver	0.59%	[1]

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other 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:

Expense Example	1 Year	3 Years	5 Years	10 Years
Deep Value ETF | Deep Value ETF | USD ($)	60	234	424	970

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 rate may indicate higher transaction costs and may result in higher taxes when 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 126% of the average value of its portfolio.

Principal Investment Strategies

The Fund uses a “passive management” (or indexing) approach to track the performance of the Index. The Index is composed of the common stock of typically 20 companies included in the S&P 500^® Index that have been selected through a proprietary ranking system developed by DVP Holdings, LLC, the Fund’s Index Provider, that evaluates the earnings and cash flows of each company to create a final universe of companies that are deeply undervalued (as defined by the Index methodology) as compared to the S&P 500^® Index overall.

The Deep Value Index

The Index is constructed using an objective, rules-based methodology that begins with an initial universe that mirrors the companies listed on the S&P 500^® Index. The universe of companies is then narrowed to include only companies that have positive earnings and returns on invested capital, generate free cash flow, and currently pay a dividend.

Valuation Metrics

Enterprise Value (EV): A company’s market capitalization adjusted to eliminate any capital structure bias (e.g., by subtracting debt and cash or cash equivalents).

EBITDA: A company’s earnings before interest, taxes, depreciation and amortization.

Free Cash Flow (FCF): A company’s cash flow from operations minus capital expenditures.

The remaining companies are then evaluated based on valuation metrics. The companies within the Index are weighted based on a rules-based assessment of their valuations relative to each other so that, at the time of each reconstitution, the 5 most undervalued companies are each weighted at 7.5%, the next 5 most undervalued companies are each weighted at 4.5% and the next 10 most undervalued companies are each weighted at 4.0%. From time to time, the Index may include more or less than 20 companies as a result of events such as acquisitions, spin-offs and other corporate actions.

The full Index of 20 companies is reconstituted annually in September. The portion of the Index with the 10 most undervalued (the “top 10”) of the 20 companies is not generally rebalanced or otherwise reconstituted during the year. The portion of the Index with the remaining 10 companies (the “bottom 10”) is reconstituted quarterly in December, March and June with each of the bottom 10 companies being weighted equally.

The Index was created in 2014 in anticipation of the commencement of operations of the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the common stocks that make up the Index. Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of any collateral held from securities lending) will be invested in the component securities of the Index. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it generally will invest in all of the component securities of the Index. However, the Fund may use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole, when the sub-adviser believes it is in the best interests of the Fund (e.g., when replicating the Index involves practical difficulties or substantial costs, an Index constituent becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations that apply to the Fund but not to the Index).

The Fund generally may invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in securities or other investments not included in the Index, but which the sub-adviser believes will help the Fund track the Index. For example, the Fund may invest in securities that are not components of the Index to reflect various corporate actions and other changes to the Index (such as reconstitutions, additions and deletions). The Fund may also invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in cash and cash equivalents, as well as in shares of other investment companies, futures contracts, and swaps.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Principal Investment Risks

As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

· Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries or sectors in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change. These investor perceptions are based on various and unpredictable factors including: expectations regarding government, economic, monetary and fiscal policies; inflation and interest rates; economic expansion or contraction; and global or regional political, economic and banking crises.

· Market Risk. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. These factors include events impacting the entire market or specific market segments, such as political, market and economic developments, as well as events that impact specific issuers. Market risk may affect a single issuer, industry, sector of the economy or the market as a whole. The Fund’s net asset value per share (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

· Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a small number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

· Passive Investment Risk. The Fund is not actively managed and neither the Adviser nor Sub-Adviser would sell shares of an equity security due to current or projected underperformance of a security, industry or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution of the Index in accordance with the Index methodology. The Fund invests in securities included in, or representative of securities included in, the Index, regardless of their investment merits. The Fund does not take defensive positions under any market conditions, including conditions that are adverse to the performance of the Fund.

· Portfolio Turnover Risk.The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses.Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

· Sector Risk.To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors.

· Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the Shares will approximate the Fund’s NAV, there may be times when the market price of the Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of the Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market.

· Tax Risk. To qualify for the favorable tax treatment generally available to regulated investment companies, the Fund must satisfy certain diversification requirements. In particular, the Fund generally may not acquire a security if, as a result of the acquisition, more than 50% of the value of the Fund’s assets would be invested in (a) issuers in which the Fund has, in each case, invested more than 5% of the Fund’s assets or (b) issuers more than 10% of whose outstanding voting securities are owned by the Fund. While the weighting of the Index is not inconsistent with these rules, given the concentration of the Index in a relatively small number of securities, it may not always be possible for the Fund to fully implement a replication strategy or a representative sampling strategy while satisfying these diversification requirements. The Fund’s efforts to satisfy the diversification requirements may affect the Fund’s execution of its investment strategy and may cause the Fund’s return to deviate from that of the Index, and the Fund’s efforts to replicate or represent the Index may cause it inadvertently to fail to satisfy the diversification requirements. If the Fund were to fail to satisfy the diversification requirements, it could incur penalty taxes and be forced to dispose of certain assets, or it could fail to qualify as a regulated investment company. If the Fund were to fail to qualify as a regulated investment company, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income.

· Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

· Value Investing Risk. The Index methodology is based on a “value” style of investing, and consequently, the Fund could suffer losses or produce poor results relative to other funds, even in a rising market, if the methodology used by the Index to determine a company’s “value” or prospects for exceeding earnings expectations or market conditions is wrong. In addition, “value stocks” can continue to be undervalued by the market for long periods of time.

Performance

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Updated performance information is also available on the Fund’s website at www.dvpfund.com or by calling the Fund toll free at 1‑800‑617‑0004.

Calendar Year Total Returns

For the year-to-date period ended September 30, 2018, the Fund’s total return was 8.93%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 12.20% for the quarter ended December 31, 2017, and the lowest quarterly return was -10.18% for the quarter ended September 30, 2015.

Average Annual Total Returns For the Period Ended December 31, 2017

Average Annual Returns - Deep Value ETF	Label	Average Annual Returns, 1 Year	Average Annual Returns, Since Inception	Average Annual Returns, Inception Date
Deep Value ETF	Return Before Taxes	27.27%	12.26%	Sep. 22, 2014
After Taxes on Distributions | Deep Value ETF	Return After Taxes on Distributions	26.63%	11.47%
After Taxes on Distributions and Sale of Fund Shares | Deep Value ETF	Return After Taxes on Distributions and Sale of Shares	15.90%	9.44%
Deep Value Index (reflects no deduction for fees, expenses, or taxes)	Deep Value Index (reflects no deduction for fees, expenses, or taxes)	27.95%	13.06%	Sep. 22, 2014
S&P 500 TR Index (reflects no deduction for fees, expenses, or taxes)	S&P 500 TR Index (reflects no deduction for fees, expenses, or taxes)	21.83%	11.68%	Sep. 22, 2014

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

[1] The Fund's investment adviser has agreed to waive 21 basis points (0.21%) of its management fees for the Fund until at least December 31, 2019. This agreement may be terminated only by, or with the consent of, the Fund's Board of Trustees.

XML

Label

Element

Value

Deep Value ETF

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Deep Value ETF

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Deep Value ETF (the “Fund”) seeks to track the price and total return performance, before fees and expenses, of the Deep Value Index (the “Index”).

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

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

Dec. 31, 2019

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 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 126% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

126.00%

Expense Exchange Traded Fund Commissions [Text]

rr_ExpenseExchangeTradedFundCommissions

This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

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 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.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund uses a “passive management” (or indexing) approach to track the performance of the Index. The Index is composed of the common stock of typically 20 companies included in the S&P 500^® Index that have been selected through a proprietary ranking system developed by DVP Holdings, LLC, the Fund’s Index Provider, that evaluates the earnings and cash flows of each company to create a final universe of companies that are deeply undervalued (as defined by the Index methodology) as compared to the S&P 500^® Index overall.

The Deep Value Index

The Index is constructed using an objective, rules-based methodology that begins with an initial universe that mirrors the companies listed on the S&P 500^® Index. The universe of companies is then narrowed to include only companies that have positive earnings and returns on invested capital, generate free cash flow, and currently pay a dividend.

Valuation Metrics

Enterprise Value (EV): A company’s market capitalization adjusted to eliminate any capital structure bias (e.g., by subtracting debt and cash or cash equivalents).

EBITDA: A company’s earnings before interest, taxes, depreciation and amortization.

Free Cash Flow (FCF): A company’s cash flow from operations minus capital expenditures.

The remaining companies are then evaluated based on valuation metrics. The companies within the Index are weighted based on a rules-based assessment of their valuations relative to each other so that, at the time of each reconstitution, the 5 most undervalued companies are each weighted at 7.5%, the next 5 most undervalued companies are each weighted at 4.5% and the next 10 most undervalued companies are each weighted at 4.0%. From time to time, the Index may include more or less than 20 companies as a result of events such as acquisitions, spin-offs and other corporate actions.

The full Index of 20 companies is reconstituted annually in September. The portion of the Index with the 10 most undervalued (the “top 10”) of the 20 companies is not generally rebalanced or otherwise reconstituted during the year. The portion of the Index with the remaining 10 companies (the “bottom 10”) is reconstituted quarterly in December, March and June with each of the bottom 10 companies being weighted equally.

The Index was created in 2014 in anticipation of the commencement of operations of the Fund.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the common stocks that make up the Index. Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of any collateral held from securities lending) will be invested in the component securities of the Index. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it generally will invest in all of the component securities of the Index. However, the Fund may use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole, when the sub-adviser believes it is in the best interests of the Fund (e.g., when replicating the Index involves practical difficulties or substantial costs, an Index constituent becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations that apply to the Fund but not to the Index).

The Fund generally may invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in securities or other investments not included in the Index, but which the sub-adviser believes will help the Fund track the Index. For example, the Fund may invest in securities that are not components of the Index to reflect various corporate actions and other changes to the Index (such as reconstitutions, additions and deletions). The Fund may also invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in cash and cash equivalents, as well as in shares of other investment companies, futures contracts, and swaps.

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. The following risks could affect the value of your investment in the Fund:

· Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries or sectors in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change. These investor perceptions are based on various and unpredictable factors including: expectations regarding government, economic, monetary and fiscal policies; inflation and interest rates; economic expansion or contraction; and global or regional political, economic and banking crises.

· Market Risk. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. These factors include events impacting the entire market or specific market segments, such as political, market and economic developments, as well as events that impact specific issuers. Market risk may affect a single issuer, industry, sector of the economy or the market as a whole. The Fund’s net asset value per share (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

· Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a small number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

· Passive Investment Risk. The Fund is not actively managed and neither the Adviser nor Sub-Adviser would sell shares of an equity security due to current or projected underperformance of a security, industry or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution of the Index in accordance with the Index methodology. The Fund invests in securities included in, or representative of securities included in, the Index, regardless of their investment merits. The Fund does not take defensive positions under any market conditions, including conditions that are adverse to the performance of the Fund.

· Portfolio Turnover Risk.The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses.Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

· Sector Risk.To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors.

· Shares May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the Shares will approximate the Fund’s NAV, there may be times when the market price of the Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of the Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market.

· Tax Risk. To qualify for the favorable tax treatment generally available to regulated investment companies, the Fund must satisfy certain diversification requirements. In particular, the Fund generally may not acquire a security if, as a result of the acquisition, more than 50% of the value of the Fund’s assets would be invested in (a) issuers in which the Fund has, in each case, invested more than 5% of the Fund’s assets or (b) issuers more than 10% of whose outstanding voting securities are owned by the Fund. While the weighting of the Index is not inconsistent with these rules, given the concentration of the Index in a relatively small number of securities, it may not always be possible for the Fund to fully implement a replication strategy or a representative sampling strategy while satisfying these diversification requirements. The Fund’s efforts to satisfy the diversification requirements may affect the Fund’s execution of its investment strategy and may cause the Fund’s return to deviate from that of the Index, and the Fund’s efforts to replicate or represent the Index may cause it inadvertently to fail to satisfy the diversification requirements. If the Fund were to fail to satisfy the diversification requirements, it could incur penalty taxes and be forced to dispose of certain assets, or it could fail to qualify as a regulated investment company. If the Fund were to fail to qualify as a regulated investment company, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income.

· Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

· Value Investing Risk. The Index methodology is based on a “value” style of investing, and consequently, the Fund could suffer losses or produce poor results relative to other funds, even in a rising market, if the methodology used by the Index to determine a company’s “value” or prospects for exceeding earnings expectations or market conditions is wrong. In addition, “value stocks” can continue to be undervalued by the market for long periods of time.

Risk Lose Money [Text]

rr_RiskLoseMoney

As a result, an investor could lose money over short or long periods of time.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a small number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1-year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Updated performance information is also available on the Fund’s website at www.dvpfund.com or by calling the Fund toll free at 1‑800‑617‑0004.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information indicates some of the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1‑800‑617‑0004

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dvpfund.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

For the year-to-date period ended September 30, 2018, the Fund’s total return was 8.93%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 12.20% for the quarter ended December 31, 2017, and the lowest quarterly return was -10.18% for the quarter ended September 30, 2015.

Year to Date Return, Label

rr_YearToDateReturnLabel

year-to-date

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

8.93%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest quarterly return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2017

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.20%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest quarterly return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.18%)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses, or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns For the Period Ended December 31, 2017

Deep Value ETF | Deep Value Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Deep Value Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

27.95%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

13.06%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 22, 2014

Deep Value ETF | S&P 500 TR Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

S&P 500 TR Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

21.83%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

11.68%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 22, 2014

Deep Value ETF | Deep Value ETF

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.80%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.80%

Less Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

0.21%

Total Annual Fund Operating Expenses After Fee Waiver

rr_NetExpensesOverAssets

0.59%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 60

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

234

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

424

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 970

Annual Return 2015

rr_AnnualReturn2015

(10.23%)

Annual Return 2016

rr_AnnualReturn2016

24.80%

Annual Return 2017

rr_AnnualReturn2017

27.27%

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

27.27%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

12.26%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 22, 2014

Deep Value ETF | Deep Value ETF | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

26.63%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

11.47%

Deep Value ETF | Deep Value ETF | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Shares

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

15.90%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

9.44%

[1] The Fund's investment adviser has agreed to waive 21 basis points (0.21%) of its management fees for the Fund until at least December 31, 2019. This agreement may be terminated only by, or with the consent of, the Fund's Board of Trustees.

XML

Loncar Cancer Immunotherapy ETF

Loncar Cancer Immunotherapy ETF

Investment Objective

The Loncar Cancer Immunotherapy ETF (the “Fund”) seeks to track the total return performance, before fees and expenses, of the Loncar Cancer Immunotherapy Index (the “Index”).

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Loncar Cancer Immunotherapy ETF Loncar Cancer Immunotherapy ETF
Management Fees	0.79%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	none
Total Annual Fund Operating Expenses	0.79%

Expense Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other 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:

Expense Example	1 Year	3 Years
Loncar Cancer Immunotherapy ETF | Loncar Cancer Immunotherapy ETF | USD ($)	81	252

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 rate may indicate higher transaction costs and may result in higher taxes when 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 78% of the average value of its portfolio.

Principal Investment Strategies

The Fund uses a “passive management” (or indexing) approach to track the performance, before fees and expenses, of the Index.

Loncar Cancer Immunotherapy Index

The Index is composed of the common stock of approximately 25 pharmaceutical or biotechnology companies identified by Loncar Investments, LLC (“Loncar” or the “Index Provider”), the Fund’s index provider, as having a high strategic focus on the development of drugs that harness the body’s own immune system to fight cancer (“immunotherapy”). Loncar identifies companies with a high strategic focus on cancer immunotherapy (“Immunotherapy Companies”) based on whether they meet one or more of the following criteria:

(i) The company has a cancer immunotherapy drug(s) approved by either the U.S. Food and Drug Administration or the European Medicines Agency;

(ii) The company has a cancer immunotherapy drug(s) in the human stage of testing;

(iii) The company has announced intentions to begin human stage testing of a cancer immunotherapy drug(s); or

(iv) The company has announced an immunotherapy collaboration or partnership with a major pharmaceutical company.

The Index is constructed using an objective, rules-based methodology that begins with an initial universe of all pharmaceutical and biotechnology companies whose equity securities or American Depositary Receipts (“ADRs”) are listed on a U.S. exchange. The initial universe is then narrowed to include only those companies that have been determined by Loncar to be Immunotherapy Companies, that are not known to be under investigation by the SEC or any other government or regulatory entity, that have a minimum market capitalization of $100 million, and that meet certain liquidity thresholds. The Index may include small-, mid-, and large-capitalization companies.

From the remaining companies, the Index Provider then selects (i) five of the largest pharmaceutical Immunotherapy Companies, including the leading pharmaceutical company in each of the three most established and recognized categories of immunotherapy techniques (cell-based therapies, checkpoint inhibitors and targeted antibodies), plus the two other largest pharmaceutical Immunotherapy Companies, and (ii) the twenty largest biotechnology Immunotherapy Companies based on their market capitalization.

The Index is equal-weighted and is rebalanced and reconstituted on the third Tuesday of June and December. The Index was created by Loncar in March 2015 in anticipation of the commencement of operations of the Fund. Additional information about the Index is available on the Index Provider’s website at www.loncarindex.com.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the component securities and ADRs that make up the Index. Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of any collateral held from securities lending) will be invested in the component securities of the Index. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it generally will invest in all of the component securities of the Index. However, the Fund may use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole, when the Fund’s sub-adviser believes it is in the best interests of the Fund (e.g., when replicating the Index involves practical difficulties or substantial costs, an Index constituent becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations that apply to the Fund but not to the Index).

The Fund generally may invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in securities or other investments not included in the Index, but which the Fund’s sub-adviser believes will help the Fund track the Index. For example, the Fund may invest in securities that are not components of the Index to reflect various corporate actions and other changes to the Index (such as reconstitutions, additions and deletions).

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index. The Fund is expected to concentrate in Immunotherapy Companies.

Principal Investment Risks

You can lose money on your investment in the Fund. The Fund is subject to the risks described below. Some or all of these risks may adversely affect the Fund’s net asset value per share (“NAV”), trading price, yield, total return, and/or ability to meet its objective. For more information about the risks of investing in the Fund, see the section in the Fund’s Prospectus titled “Additional Information About the Fund—Principal Investment Risks.”

· Depositary Receipt Risk. Depositary Receipts involve risks similar to those associated with investments in foreign securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Depositary Receipts listed on U.S. exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in Depositary Receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the Depositary Receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

· Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, sectors or companies in which the Fund invests. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change.

· ETF Risks.

o Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

o Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

o Shares of the Fund May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the Fund will approximate the Fund’s NAV, there may be times when the market price of the shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of the Fund’s shares or during periods of market volatility. This risk is heightened in times of market volatility or periods of steep market declines. Because certain securities held by the Fund trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

o Trading. Although Shares are listed for trading on The Nasdaq Stock Market LLC (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares.

· Foreign Companies Risk. Investments in ADRs that provide exposure to securities traded in foreign markets involve substantial risk due to limited information; different accounting, auditing and financial reporting standards; or adverse political or economic developments.

· Immunotherapy Companies Risk. ImmunotherapyCompanies are highly dependent on the development, procurement and marketing of drugs and the protection and exploitation of intellectual property rights. A company’s valuation can also be greatly affected if one of its products is proven or alleged to be unsafe, ineffective or unprofitable. The stock prices of ImmunotherapyCompanies have been and will likely continue to be very volatile.

The costs associated with developing new drugs can be significant, and the results are unpredictable. Newly developed drugs may be susceptible to product obsolescence due to intense competition from new products and less costly generic products. Moreover, the process for obtaining regulatory approval by the U.S. Food and Drug Administration or other governmental regulatory authorities is long and costly and there can be no assurance that the necessary approvals will be obtained or maintained.

Certain companies in which the Fund may invest are non-U.S. issuers whose securities or ADRs are listed on U.S. exchanges. The international operations of many Immunotherapy Companies expose them to risks associated with instability and changes in economic and political conditions, foreign currency fluctuations, changes in foreign regulations and other risks inherent to international business.

· Non-Diversification Risk. The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

· Passive Investment Risk. The Fund is not actively managed and the Fund’s sub-adviser would not sell shares of an equity security due to current or projected underperformance of a security, industry or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution of the Index in accordance with the Index methodology.

· Portfolio Turnover Risk. The Fund may actively and frequently trade securities or other instruments in its portfolio to carry out its investment strategies. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

· Smaller Companies Risk. The Fund may invest in the securities of smaller-capitalization companies. As a result, the Fund may be more volatile than funds that invest in larger, more established companies. The securities of smaller-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Smaller-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

· Tax Risk.  To qualify for the favorable tax treatment generally available to regulated investment companies (“RICs”), the Fund must satisfy certain diversification requirements. In particular, the Fund generally may not acquire a security if, as a result of the acquisition, more than 50% of the value of the Fund’s assets would be invested in (a) issuers in which the Fund has, in each case, invested more than 5% of the Fund’s assets or (b) issuers more than 10% of whose outstanding voting securities are owned by the Fund. While the weighting of the Index is not inconsistent with these rules, given the concentration of the Index in a relatively small number of securities, it may not always be possible for the Fund to fully implement a replication strategy or a representative sampling strategy while satisfying these diversification requirements. The Fund’s efforts to satisfy the diversification requirements may affect the Fund’s execution of its investment strategy and may cause the Fund’s return to deviate from that of the Index, and the Fund’s efforts to replicate or represent the Index may cause it inadvertently to fail to satisfy the diversification requirements.  If the Fund were to fail to satisfy the diversification requirements, it could incur penalty taxes and be forced to dispose of certain assets, or it could fail to qualify as a regulated investment company.  If the Fund were to fail to qualify as a regulated investment company, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income.

· Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Performance

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for the calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1‑year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Updated performance information is also available on the Fund’s website at www.LoncarFunds.com or by calling the Fund toll free at 1‑800‑617‑0004.

Calendar Year Total Return

For the year-to-date period ended September 30, 2018, the Fund’s total return was 4.84%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 17.84% for the quarter ended September 30, 2016 and the lowest quarterly return was –23.82% for the quarter ended March 31, 2016.

Average Annual Total Returns For the Periods Ended December 31, 2017

Average Annual Returns - Loncar Cancer Immunotherapy ETF	Label	Average Annual Returns, 1 Year	Average Annual Returns, Since Inception	Average Annual Returns, Inception Date
Loncar Cancer Immunotherapy ETF	Return Before Taxes	13.09%	(1.52%)	Oct. 13, 2015
After Taxes on Distributions | Loncar Cancer Immunotherapy ETF	Return After Taxes on Distributions	12.49%	(1.82%)
After Taxes on Distributions and Sale of Fund Shares | Loncar Cancer Immunotherapy ETF	Return After Taxes on Distributions and Sale of Fund Shares	7.52%	(1.26%)
Loncar Cancer Immunotherapy Index (reflects no deduction for fees, expenses, or taxes)	Loncar Cancer Immunotherapy Index (reflects no deduction for fees, expenses, or taxes)	14.05%	(0.56%)	Oct. 13, 2015
Standard & Poor’s 500 (S&P 500 Index) (reflects no deduction for fees, expenses, or taxes)	Standard & Poor’s 500 (S&P 500 Index) (reflects no deduction for fees, expenses, or taxes)	21.83%	16.32%	Oct. 13, 2015

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Fund Shares” may be higher than the other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

XML

Label

Element

Value

Loncar Cancer Immunotherapy ETF

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Loncar Cancer Immunotherapy ETF

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Loncar Cancer Immunotherapy ETF (the “Fund”) seeks to track the total return performance, before fees and expenses, of the Loncar Cancer Immunotherapy Index (the “Index”).

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

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)

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 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. For the fiscal year ended August 31, 2018, the Fund’s portfolio turnover rate was 78% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

78.00%

Expense Exchange Traded Fund Commissions [Text]

rr_ExpenseExchangeTradedFundCommissions

This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense 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 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.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund uses a “passive management” (or indexing) approach to track the performance, before fees and expenses, of the Index.

Loncar Cancer Immunotherapy Index

The Index is composed of the common stock of approximately 25 pharmaceutical or biotechnology companies identified by Loncar Investments, LLC (“Loncar” or the “Index Provider”), the Fund’s index provider, as having a high strategic focus on the development of drugs that harness the body’s own immune system to fight cancer (“immunotherapy”). Loncar identifies companies with a high strategic focus on cancer immunotherapy (“Immunotherapy Companies”) based on whether they meet one or more of the following criteria:

(i) The company has a cancer immunotherapy drug(s) approved by either the U.S. Food and Drug Administration or the European Medicines Agency;

(ii) The company has a cancer immunotherapy drug(s) in the human stage of testing;

(iii) The company has announced intentions to begin human stage testing of a cancer immunotherapy drug(s); or

(iv) The company has announced an immunotherapy collaboration or partnership with a major pharmaceutical company.

The Index is constructed using an objective, rules-based methodology that begins with an initial universe of all pharmaceutical and biotechnology companies whose equity securities or American Depositary Receipts (“ADRs”) are listed on a U.S. exchange. The initial universe is then narrowed to include only those companies that have been determined by Loncar to be Immunotherapy Companies, that are not known to be under investigation by the SEC or any other government or regulatory entity, that have a minimum market capitalization of $100 million, and that meet certain liquidity thresholds. The Index may include small-, mid-, and large-capitalization companies.

From the remaining companies, the Index Provider then selects (i) five of the largest pharmaceutical Immunotherapy Companies, including the leading pharmaceutical company in each of the three most established and recognized categories of immunotherapy techniques (cell-based therapies, checkpoint inhibitors and targeted antibodies), plus the two other largest pharmaceutical Immunotherapy Companies, and (ii) the twenty largest biotechnology Immunotherapy Companies based on their market capitalization.

The Index is equal-weighted and is rebalanced and reconstituted on the third Tuesday of June and December. The Index was created by Loncar in March 2015 in anticipation of the commencement of operations of the Fund. Additional information about the Index is available on the Index Provider’s website at www.loncarindex.com.

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the component securities and ADRs that make up the Index. Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of any collateral held from securities lending) will be invested in the component securities of the Index. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it generally will invest in all of the component securities of the Index. However, the Fund may use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return and other characteristics closely resemble the risk, return and other characteristics of the Index as a whole, when the Fund’s sub-adviser believes it is in the best interests of the Fund (e.g., when replicating the Index involves practical difficulties or substantial costs, an Index constituent becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations that apply to the Fund but not to the Index).

The Fund generally may invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in securities or other investments not included in the Index, but which the Fund’s sub-adviser believes will help the Fund track the Index. For example, the Fund may invest in securities that are not components of the Index to reflect various corporate actions and other changes to the Index (such as reconstitutions, additions and deletions).

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index. The Fund is expected to concentrate in Immunotherapy Companies.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index. The Fund is expected to concentrate in Immunotherapy Companies.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

You can lose money on your investment in the Fund. The Fund is subject to the risks described below. Some or all of these risks may adversely affect the Fund’s net asset value per share (“NAV”), trading price, yield, total return, and/or ability to meet its objective. For more information about the risks of investing in the Fund, see the section in the Fund’s Prospectus titled “Additional Information About the Fund—Principal Investment Risks.”

· Depositary Receipt Risk. Depositary Receipts involve risks similar to those associated with investments in foreign securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Depositary Receipts listed on U.S. exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in Depositary Receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the Depositary Receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

· Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, sectors or companies in which the Fund invests. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change.

· ETF Risks.

o Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

o Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

o Shares of the Fund May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the Fund will approximate the Fund’s NAV, there may be times when the market price of the shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of the Fund’s shares or during periods of market volatility. This risk is heightened in times of market volatility or periods of steep market declines. Because certain securities held by the Fund trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

o Trading. Although Shares are listed for trading on The Nasdaq Stock Market LLC (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares.

· Foreign Companies Risk. Investments in ADRs that provide exposure to securities traded in foreign markets involve substantial risk due to limited information; different accounting, auditing and financial reporting standards; or adverse political or economic developments.

· Immunotherapy Companies Risk. ImmunotherapyCompanies are highly dependent on the development, procurement and marketing of drugs and the protection and exploitation of intellectual property rights. A company’s valuation can also be greatly affected if one of its products is proven or alleged to be unsafe, ineffective or unprofitable. The stock prices of ImmunotherapyCompanies have been and will likely continue to be very volatile.

The costs associated with developing new drugs can be significant, and the results are unpredictable. Newly developed drugs may be susceptible to product obsolescence due to intense competition from new products and less costly generic products. Moreover, the process for obtaining regulatory approval by the U.S. Food and Drug Administration or other governmental regulatory authorities is long and costly and there can be no assurance that the necessary approvals will be obtained or maintained.

Certain companies in which the Fund may invest are non-U.S. issuers whose securities or ADRs are listed on U.S. exchanges. The international operations of many Immunotherapy Companies expose them to risks associated with instability and changes in economic and political conditions, foreign currency fluctuations, changes in foreign regulations and other risks inherent to international business.

· Non-Diversification Risk. The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

· Passive Investment Risk. The Fund is not actively managed and the Fund’s sub-adviser would not sell shares of an equity security due to current or projected underperformance of a security, industry or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution of the Index in accordance with the Index methodology.

· Portfolio Turnover Risk. The Fund may actively and frequently trade securities or other instruments in its portfolio to carry out its investment strategies. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

· Smaller Companies Risk. The Fund may invest in the securities of smaller-capitalization companies. As a result, the Fund may be more volatile than funds that invest in larger, more established companies. The securities of smaller-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Smaller-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.

· Tax Risk.  To qualify for the favorable tax treatment generally available to regulated investment companies (“RICs”), the Fund must satisfy certain diversification requirements. In particular, the Fund generally may not acquire a security if, as a result of the acquisition, more than 50% of the value of the Fund’s assets would be invested in (a) issuers in which the Fund has, in each case, invested more than 5% of the Fund’s assets or (b) issuers more than 10% of whose outstanding voting securities are owned by the Fund. While the weighting of the Index is not inconsistent with these rules, given the concentration of the Index in a relatively small number of securities, it may not always be possible for the Fund to fully implement a replication strategy or a representative sampling strategy while satisfying these diversification requirements. The Fund’s efforts to satisfy the diversification requirements may affect the Fund’s execution of its investment strategy and may cause the Fund’s return to deviate from that of the Index, and the Fund’s efforts to replicate or represent the Index may cause it inadvertently to fail to satisfy the diversification requirements.  If the Fund were to fail to satisfy the diversification requirements, it could incur penalty taxes and be forced to dispose of certain assets, or it could fail to qualify as a regulated investment company.  If the Fund were to fail to qualify as a regulated investment company, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income.

· Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Risk Lose Money [Text]

rr_RiskLoseMoney

You can lose money on your investment in the Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information indicates some of the risks of investing in the Fund. The bar chart shows the Fund’s performance for the calendar years ended December 31. The table illustrates how the Fund’s average annual returns for the 1‑year and since inception periods compare with those of a broad measure of market performance and the Index. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Updated performance information is also available on the Fund’s website at www.LoncarFunds.com or by calling the Fund toll free at 1‑800‑617‑0004.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information indicates some of the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1‑800‑617‑0004

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LoncarFunds.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Return

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

For the year-to-date period ended September 30, 2018, the Fund’s total return was 4.84%.

During the period of time shown in the bar chart, the Fund’s highest quarterly return was 17.84% for the quarter ended September 30, 2016 and the lowest quarterly return was –23.82% for the quarter ended March 31, 2016.

Year to Date Return, Label

rr_YearToDateReturnLabel

year-to-date period

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

4.84%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest quarterly return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

17.84%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest quarterly return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2016

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(23.82%)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses, or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Fund Shares” may be higher than the other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above 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. In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Fund Shares” may be higher than the other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor. After-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as an individual retirement account (“IRA”) or other tax-advantaged accounts.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns For the Periods Ended December 31, 2017

Loncar Cancer Immunotherapy ETF | Loncar Cancer Immunotherapy Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Loncar Cancer Immunotherapy Index (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

14.05%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

(0.56%)

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 13, 2015

Loncar Cancer Immunotherapy ETF | Standard & Poor’s 500 (S&P 500 Index) (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Standard & Poor’s 500 (S&P 500 Index) (reflects no deduction for fees, expenses, or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

21.83%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

16.32%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 13, 2015

Loncar Cancer Immunotherapy ETF | Loncar Cancer Immunotherapy ETF

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.79%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.79%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 81

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

$ 252

Annual Return 2016

rr_AnnualReturn2016

(25.36%)

Annual Return 2017

rr_AnnualReturn2017

13.09%

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

13.09%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

(1.52%)

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 13, 2015

Loncar Cancer Immunotherapy ETF | Loncar Cancer Immunotherapy ETF | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

12.49%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

(1.82%)

Loncar Cancer Immunotherapy ETF | Loncar Cancer Immunotherapy ETF | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

7.52%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

(1.26%)

XML

Loncar China BioPharma ETF

Loncar China BioPharma ETF

Investment Objective

The Loncar China BioPharma ETF (the “Fund”) seeks to track the performance, before fees and expenses, of the Loncar China BioPharma Index (the “Index”).

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). This table and the example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Loncar China BioPharma ETF Loncar China BioPharma ETF
Management Fees	0.79%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	none	[1]
Total Annual Fund Operating Expenses	0.79%

Expense Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other 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:

Expense Example	1 Year	3 Years	5 Years	10 Years
Loncar China BioPharma ETF | Loncar China BioPharma ETF | USD ($)	81	252	439	978

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 rate may indicate higher transaction costs and may result in higher taxes when 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. For the fiscal period August 14, 2018 (commencement of operations) through August 31, 2018, the Fund’s portfolio turnover rate was 0% of the average value of its portfolio.

Principal Investment Strategy

The Fund uses a “passive management” (or indexing) approach to track the performance, before fees and expenses, of the Index. The Index was developed in 2018 by Loncar Investments LLC, the Fund’s index provider (“Loncar” or the “Index Provider”), and seeks to track the performance of a modified equal-weighted portfolio of companies directly involved in the growth of China’s pharmaceutical and biotech related industries (China’s “biopharma sector”). The Index includes pharmaceutical companies, biotech companies, drug manufacturers, diagnostics companies, wholesalers or distributors of biopharma products, and biopharma service providers (“Biopharma Companies”).

Loncar China BioPharma Index

The Index is constructed from the universe of Nasdaq- or Hong Kong Stock Exchange-listed companies identified by the Index methodology as Biopharma Companies. To maintain a focus on innovation in the Chinese biopharma sector, companies in the Index universe are screened to eliminate those that focus strictly on manufacturing active pharmaceutical ingredients. The remaining companies are then screened according to the Index rules to include only companies (i) whose principal corporate headquarters is in China or (ii) for which at least 51% of the value of their product revenue and pipeline is tied directly to the Chinese market (such remaining companies, “China Biopharma Companies”).

The pool of China Biopharma Companies is then screened for investibility leaving only companies having a market capitalization of at least USD$200 million, meeting a minimum liquidity threshold, and that are not publicly known to currently be under formal investigation by a government or regulatory entity.

At the time of each reconstitution of the Index on the second Monday of each February and August (beginning in February 2019), each constituent is weighted equally, subject to the following adjustments applied depending on a company’s market capitalization to emphasize the role of larger companies in the Index:

Market Capitalization (USD$)	Weight Adjustment Factor
$10 billion or more	140%
Between $1 billion and $10 billion	100%
From $200 million to $1 billion	70%

As of November 14, 2018, the Index contained 28 companies, 6 of which were listed on Nasdaq and 22 of which were listed on the Hong Kong Stock Exchange. As of November 14, 2018, the three largest components of the Index were Sinopharm Group Co Ltd (6.41%), CSPC Pharmaceutical Group Ltd (4.97%), and SSY Group (4.94%).

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the component securities and depositary receipts that make up the Index. Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of any collateral held from securities lending) will be invested in the component securities of the Index or in depositary receipts representing such component securities. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it generally will invest in all of the component securities of the Index in approximately the same proportion as in the Index. However, the Fund may use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return, and other characteristics closely resemble the risk, return, and other characteristics of the Index as a whole, when the Fund’s sub-adviser believes it is in the best interests of the Fund (e.g., when replicating the Index involves practical difficulties or substantial costs, an Index constituent becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations that apply to the Fund but not to the Index).

The Fund generally may invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in securities or other investments not included in the Index, but which the Fund’s sub-adviser believes will help the Fund track the Index. For example, the Fund may invest in securities that are not components of the Index to reflect various corporate actions and other changes to the Index (such as reconstitutions, additions and deletions).

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index. The Adviser expects that the Index, and consequently the Fund, will generally be concentrated in the securities of biotech and pharmaceutical companies.

Principal Investment Risks

You can lose money on your investment in the Fund. The Fund is subject to the risks described below. Some or all of these risks may adversely affect the Fund’s net asset value per share (“NAV”), trading price, yield, total return, and/or ability to meet its objective. For more information about the risks of investing in the Fund, see the section in the Fund’s Prospectus titled “Additional Information About the Fund—Principal Investment Risks.”

· China Biopharma Risk. The biopharmaceutical industry in China is strictly regulated and changes in such regulations, including banning or limiting certain products, may have a material adverse effect on the operations, revenues, and profitability of Biopharma Companies. The laws and regulations applicable to the process of administrative approval of medicine and its production in China require entities producing biopharma products to comply strictly with certain standards and specifications promulgated by the government. In the event that a product is discovered to be not compliant with the government’s standards and specifications, the health department may revoke its approval of such product, or otherwise limit the use of such product. Additionally, the process of conducting research and various tests on new products before obtaining a new medicine certificate from the National Medical Products Administration (“NMPA”) and subsequent procedures may take several years, and the price of certain biopharma products may be regulated in China. Changes in these laws and regulations, including banning or limiting certain products, could have a material adverse effect on the operations, revenues, and profitability of Biopharma Companies held by the Fund.

· Currency Exchange Rate Risk. The Fund’s assets include investments denominated in non-U.S. currencies or in securities that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investment and the value of your Shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

· Depositary Receipt Risk. Depositary Receipts involve risks similar to those associated with investments in foreign securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Depositary Receipts listed on U.S. exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in Depositary Receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the Depositary Receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

· Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. The Fund’s NAV and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

· ETF Risks.

o Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

o Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

o Shares of the Fund May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the Fund will approximate the Fund’s NAV, there may be times when the market price of the shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of the Fund’s shares or during periods of market volatility. This risk is heightened in times of market volatility or periods of steep market declines. Because certain securities held by the Fund trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

o Trading.Although Shares are listed for trading on The Nasdaq Stock Market LLC (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares.

· Foreign Securities Risk. Investments in non-U.S. securities involve certain risks that may not be present with investments in U.S. securities. For example, investments in non-U.S. securities may be subject to risk of loss due to foreign currency fluctuations or to political or economic instability. Investments in non-U.S. securities also may be subject to withholding or other taxes and may be subject to additional trading, settlement, custodial, and operational risks. These and other factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.

· Geographic Investment Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies of a single country or region, such as China, it is more likely to be impacted by events or conditions affecting that country or region.

o China-Specific Risk.Investments in Chinese issuers subject the Fund to risks specific to China. China may be subject to considerable degrees of economic, political, and social instability. China is a developing market and demonstrates significantly higher volatility from time to time in comparison to developed markets. Over the past 25 years, the Chinese government has undertaken reform of economic and market practices and is expanding the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility, and pricing anomalies resulting from governmental influence, a lack of publicly available information, and/or political and social instability. Internal social unrest or confrontations with other neighboring countries, including military conflicts in response to such events, may also disrupt economic development in China and result in a greater risk of currency fluctuations, currency convertibility, interest rate fluctuations, and higher rates of inflation. Export growth continues to be a major driver of China’s rapid economic growth. Reduction in spending on Chinese products and services, institution of tariffs or other trade barriers, or a downturn in any of the economies of China’s key trading partners may have an adverse impact on the Chinese economy.

· Geopolitical Risk. Some countries and regions in which the Fund invests have experienced security concerns, war or threats of war and aggression, terrorism, economic uncertainty, natural and environmental disasters and/or systemic market dislocations that have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S. and world economies and markets generally, each of which may negatively impact the Fund’s investments.

· Market Capitalization Risk

o Large-Capitalization Investing.The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

o Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large capitalization stocks or the stock market as a whole.

o Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

· New Fund Risk. The Fund is a recently organized, non-diversified management investment company with no operating history. As a result, prospective investors have no track record or history on which to base their investment decision.

· Non-Diversification Risk. The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

· Passive Investment Risk. The Fund is not actively managed and the Fund’s sub-adviser would not sell shares of an equity security due to current or projected underperformance of a security, industry or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution of the Index in accordance with the Index methodology.

· Portfolio Turnover Risk. The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

· Sector Risk.To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund’s investments will be concentrated in an industry or group of industries to the extent the Index is so concentrated.The Fund may be susceptible to an increased risk of loss, including losses due to adverse occurrences affecting the Fund more than the market as a whole, to the extent that the Fund’s investments are concentrated in the securities of a particular industry, group of industries, or sector. A significant portion of the Fund’s assets will be invested in the biotechnology and pharmaceutical industries, which expose the Fund to the risks of the following sector:

o Healthcare Sector Risk. Companies in the health care sector are subject to extensive government regulation and their profitability can be significantly affected by restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure (including price discounting), limited product lines, and an increased emphasis on the delivery of healthcare through outpatient services.

The costs associated with developing new drugs can be significant, and the results are unpredictable. Newly developed drugs may be susceptible to product obsolescence due to intense competition from new products and less costly generic products. Moreover, the process for obtaining regulatory approval by the U.S. Food and Drug Administration (“FDA”), NMPA, or other foreign or domestic governmental regulatory authorities is long and costly and there can be no assurance that the necessary approvals will be obtained or maintained. The values of many companies in the health care sector are also dependent on the development, protection and exploitation of intellectual property rights and other proprietary information, and the profitability of these companies may be significantly affected by such things as the expiration of patents or the loss of, or the inability to enforce, intellectual property rights.

· Tax Risk. To qualify for the favorable tax treatment generally available to a regulated investment company (“RIC”), the Fund must satisfy, among other requirements described in the SAI, certain diversification requirements. Given the concentration of the Index in a relatively small number of securities, it may not always be possible for the Fund to fully implement a replication strategy or a representative sampling strategy while satisfying these diversification requirements. The Fund’s efforts to replicate or represent the Index may cause it inadvertently to fail to satisfy the diversification requirements. If the Fund were to fail to satisfy the diversification requirements, it could be eligible for relief provisions if the failure is due to reasonable cause and not willful neglect and if a penalty tax is paid with respect to each failure to satisfy the applicable requirements. Additionally, relief is provided for certain de minimis failures of the diversification requirements where the Fund corrects the failure within a specified period. If the Fund were to fail to qualify as a RIC for a tax year, and the relief provisions are not available, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income. In such case, its shareholders would be taxed as if they received ordinary dividends, although corporate shareholders could be eligible for the dividends received deduction (subject to certain limitations) and individuals may be able to benefit from the lower tax rates available to qualified dividend income. In addition, the Fund could be required to recognize unrealized gains, pay substantial taxes and interest, and make substantial distributions before requalifying as a RIC.

· Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Performance

The Fund is new and therefore does not have a performance history for a full calendar year. In the future, performance information for the Fund will be presented in this section. Updated performance information is also available on the Fund’s website at www.loncarfunds.com.

[1] Estimated for the current fiscal year.

XML

Label

Element

Value

Loncar China BioPharma ETF

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Loncar China BioPharma ETF

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Loncar China BioPharma ETF (the “Fund”) seeks to track the performance, before fees and expenses, of the Loncar China BioPharma Index (the “Index”).

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 (“Shares”). This table and the example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

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)

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 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. For the fiscal period August 14, 2018 (commencement of operations) through August 31, 2018, the Fund’s portfolio turnover rate was 0% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

none

Expense Exchange Traded Fund Commissions [Text]

rr_ExpenseExchangeTradedFundCommissions

This table and the example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

Estimated for the current fiscal year.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense 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 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.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund uses a “passive management” (or indexing) approach to track the performance, before fees and expenses, of the Index. The Index was developed in 2018 by Loncar Investments LLC, the Fund’s index provider (“Loncar” or the “Index Provider”), and seeks to track the performance of a modified equal-weighted portfolio of companies directly involved in the growth of China’s pharmaceutical and biotech related industries (China’s “biopharma sector”). The Index includes pharmaceutical companies, biotech companies, drug manufacturers, diagnostics companies, wholesalers or distributors of biopharma products, and biopharma service providers (“Biopharma Companies”).

Loncar China BioPharma Index

The Index is constructed from the universe of Nasdaq- or Hong Kong Stock Exchange-listed companies identified by the Index methodology as Biopharma Companies. To maintain a focus on innovation in the Chinese biopharma sector, companies in the Index universe are screened to eliminate those that focus strictly on manufacturing active pharmaceutical ingredients. The remaining companies are then screened according to the Index rules to include only companies (i) whose principal corporate headquarters is in China or (ii) for which at least 51% of the value of their product revenue and pipeline is tied directly to the Chinese market (such remaining companies, “China Biopharma Companies”).

The pool of China Biopharma Companies is then screened for investibility leaving only companies having a market capitalization of at least USD$200 million, meeting a minimum liquidity threshold, and that are not publicly known to currently be under formal investigation by a government or regulatory entity.

At the time of each reconstitution of the Index on the second Monday of each February and August (beginning in February 2019), each constituent is weighted equally, subject to the following adjustments applied depending on a company’s market capitalization to emphasize the role of larger companies in the Index:

Market Capitalization (USD$)	Weight Adjustment Factor
$10 billion or more	140%
Between $1 billion and $10 billion	100%
From $200 million to $1 billion	70%

As of November 14, 2018, the Index contained 28 companies, 6 of which were listed on Nasdaq and 22 of which were listed on the Hong Kong Stock Exchange. As of November 14, 2018, the three largest components of the Index were Sinopharm Group Co Ltd (6.41%), CSPC Pharmaceutical Group Ltd (4.97%), and SSY Group (4.94%).

The Fund’s Investment Strategy

The Fund attempts to invest all, or substantially all, of its assets in the component securities and depositary receipts that make up the Index. Under normal circumstances, at least 80% of the Fund’s total assets (exclusive of any collateral held from securities lending) will be invested in the component securities of the Index or in depositary receipts representing such component securities. Exchange Traded Concepts, LLC (“ETC” or the “Adviser”), the Fund’s investment adviser, expects that, over time, the correlation between the Fund’s performance and that of the Index, before fees and expenses, will be 95% or better.

The Fund will generally use a “replication” strategy to achieve its investment objective, meaning it generally will invest in all of the component securities of the Index in approximately the same proportion as in the Index. However, the Fund may use a “representative sampling” strategy, meaning it may invest in a sample of the securities in the Index whose risk, return, and other characteristics closely resemble the risk, return, and other characteristics of the Index as a whole, when the Fund’s sub-adviser believes it is in the best interests of the Fund (e.g., when replicating the Index involves practical difficulties or substantial costs, an Index constituent becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations that apply to the Fund but not to the Index).

The Fund generally may invest up to 20% of its total assets (exclusive of any collateral held from securities lending) in securities or other investments not included in the Index, but which the Fund’s sub-adviser believes will help the Fund track the Index. For example, the Fund may invest in securities that are not components of the Index to reflect various corporate actions and other changes to the Index (such as reconstitutions, additions and deletions).

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index. The Adviser expects that the Index, and consequently the Fund, will generally be concentrated in the securities of biotech and pharmaceutical companies.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

To the extent the Index concentrates (i.e., holds more than 25% of its total assets) in the securities of a particular industry or group of related industries, the Fund will concentrate its investments to approximately the same extent as the Index. The Adviser expects that the Index, and consequently the Fund, will generally be concentrated in the securities of biotech and pharmaceutical companies.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

You can lose money on your investment in the Fund. The Fund is subject to the risks described below. Some or all of these risks may adversely affect the Fund’s net asset value per share (“NAV”), trading price, yield, total return, and/or ability to meet its objective. For more information about the risks of investing in the Fund, see the section in the Fund’s Prospectus titled “Additional Information About the Fund—Principal Investment Risks.”

· China Biopharma Risk. The biopharmaceutical industry in China is strictly regulated and changes in such regulations, including banning or limiting certain products, may have a material adverse effect on the operations, revenues, and profitability of Biopharma Companies. The laws and regulations applicable to the process of administrative approval of medicine and its production in China require entities producing biopharma products to comply strictly with certain standards and specifications promulgated by the government. In the event that a product is discovered to be not compliant with the government’s standards and specifications, the health department may revoke its approval of such product, or otherwise limit the use of such product. Additionally, the process of conducting research and various tests on new products before obtaining a new medicine certificate from the National Medical Products Administration (“NMPA”) and subsequent procedures may take several years, and the price of certain biopharma products may be regulated in China. Changes in these laws and regulations, including banning or limiting certain products, could have a material adverse effect on the operations, revenues, and profitability of Biopharma Companies held by the Fund.

· Currency Exchange Rate Risk. The Fund’s assets include investments denominated in non-U.S. currencies or in securities that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investment and the value of your Shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

· Depositary Receipt Risk. Depositary Receipts involve risks similar to those associated with investments in foreign securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Depositary Receipts listed on U.S. exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in Depositary Receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the Depositary Receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

· Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. The Fund’s NAV and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

· ETF Risks.

o Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

o Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

o Shares of the Fund May Trade at Prices Other Than NAV. As with all exchange traded funds (“ETFs”), Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the Fund will approximate the Fund’s NAV, there may be times when the market price of the shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of the Fund’s shares or during periods of market volatility. This risk is heightened in times of market volatility or periods of steep market declines. Because certain securities held by the Fund trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.

o Trading.Although Shares are listed for trading on The Nasdaq Stock Market LLC (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares.

· Foreign Securities Risk. Investments in non-U.S. securities involve certain risks that may not be present with investments in U.S. securities. For example, investments in non-U.S. securities may be subject to risk of loss due to foreign currency fluctuations or to political or economic instability. Investments in non-U.S. securities also may be subject to withholding or other taxes and may be subject to additional trading, settlement, custodial, and operational risks. These and other factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.

· Geographic Investment Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies of a single country or region, such as China, it is more likely to be impacted by events or conditions affecting that country or region.

o China-Specific Risk.Investments in Chinese issuers subject the Fund to risks specific to China. China may be subject to considerable degrees of economic, political, and social instability. China is a developing market and demonstrates significantly higher volatility from time to time in comparison to developed markets. Over the past 25 years, the Chinese government has undertaken reform of economic and market practices and is expanding the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility, and pricing anomalies resulting from governmental influence, a lack of publicly available information, and/or political and social instability. Internal social unrest or confrontations with other neighboring countries, including military conflicts in response to such events, may also disrupt economic development in China and result in a greater risk of currency fluctuations, currency convertibility, interest rate fluctuations, and higher rates of inflation. Export growth continues to be a major driver of China’s rapid economic growth. Reduction in spending on Chinese products and services, institution of tariffs or other trade barriers, or a downturn in any of the economies of China’s key trading partners may have an adverse impact on the Chinese economy.

· Geopolitical Risk. Some countries and regions in which the Fund invests have experienced security concerns, war or threats of war and aggression, terrorism, economic uncertainty, natural and environmental disasters and/or systemic market dislocations that have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S. and world economies and markets generally, each of which may negatively impact the Fund’s investments.

· Market Capitalization Risk

o Large-Capitalization Investing.The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

o Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large capitalization stocks or the stock market as a whole.

o Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

· New Fund Risk. The Fund is a recently organized, non-diversified management investment company with no operating history. As a result, prospective investors have no track record or history on which to base their investment decision.

· Non-Diversification Risk. The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

· Passive Investment Risk. The Fund is not actively managed and the Fund’s sub-adviser would not sell shares of an equity security due to current or projected underperformance of a security, industry or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution of the Index in accordance with the Index methodology.

· Portfolio Turnover Risk. The Fund may trade all or a significant portion of the securities in its portfolio in connection with each rebalance and reconstitution of its Index. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

· Sector Risk.To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. The Fund’s investments will be concentrated in an industry or group of industries to the extent the Index is so concentrated.The Fund may be susceptible to an increased risk of loss, including losses due to adverse occurrences affecting the Fund more than the market as a whole, to the extent that the Fund’s investments are concentrated in the securities of a particular industry, group of industries, or sector. A significant portion of the Fund’s assets will be invested in the biotechnology and pharmaceutical industries, which expose the Fund to the risks of the following sector:

o Healthcare Sector Risk. Companies in the health care sector are subject to extensive government regulation and their profitability can be significantly affected by restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure (including price discounting), limited product lines, and an increased emphasis on the delivery of healthcare through outpatient services.

The costs associated with developing new drugs can be significant, and the results are unpredictable. Newly developed drugs may be susceptible to product obsolescence due to intense competition from new products and less costly generic products. Moreover, the process for obtaining regulatory approval by the U.S. Food and Drug Administration (“FDA”), NMPA, or other foreign or domestic governmental regulatory authorities is long and costly and there can be no assurance that the necessary approvals will be obtained or maintained. The values of many companies in the health care sector are also dependent on the development, protection and exploitation of intellectual property rights and other proprietary information, and the profitability of these companies may be significantly affected by such things as the expiration of patents or the loss of, or the inability to enforce, intellectual property rights.

· Tax Risk. To qualify for the favorable tax treatment generally available to a regulated investment company (“RIC”), the Fund must satisfy, among other requirements described in the SAI, certain diversification requirements. Given the concentration of the Index in a relatively small number of securities, it may not always be possible for the Fund to fully implement a replication strategy or a representative sampling strategy while satisfying these diversification requirements. The Fund’s efforts to replicate or represent the Index may cause it inadvertently to fail to satisfy the diversification requirements. If the Fund were to fail to satisfy the diversification requirements, it could be eligible for relief provisions if the failure is due to reasonable cause and not willful neglect and if a penalty tax is paid with respect to each failure to satisfy the applicable requirements. Additionally, relief is provided for certain de minimis failures of the diversification requirements where the Fund corrects the failure within a specified period. If the Fund were to fail to qualify as a RIC for a tax year, and the relief provisions are not available, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income. In such case, its shareholders would be taxed as if they received ordinary dividends, although corporate shareholders could be eligible for the dividends received deduction (subject to certain limitations) and individuals may be able to benefit from the lower tax rates available to qualified dividend income. In addition, the Fund could be required to recognize unrealized gains, pay substantial taxes and interest, and make substantial distributions before requalifying as a RIC.

· Tracking Error Risk. As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.

Risk Lose Money [Text]

rr_RiskLoseMoney

You can lose money on your investment in the Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The Fund is new and therefore does not have a performance history for a full calendar year. In the future, performance information for the Fund will be presented in this section. Updated performance information is also available on the Fund’s website at www.loncarfunds.com.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

The Fund is new and therefore does not have a performance history for a full calendar year.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.loncarfunds.com

Loncar China BioPharma ETF | Loncar China BioPharma ETF

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.79%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

none

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.79%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 81

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

252

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

439

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 978

[1] Estimated for the current fiscal year.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Dec. 31, 2018