v3.26.1
Fees and Expenses
Dec. 31, 2025
Guinness Atkinson Alternative Energy Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy and hold shares of the Alternative Energy Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.:

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

 

None(1)

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

  

Management Fees:

 

0.80%

Distribution (12b-1) Fees:

 

None

Other Expenses:

 

1.09%

Shareholder Servicing Plan Fees

0.18%

 

Tax Expense

0.01%

 

All Other Expenses

0.90%

 

Total Annual Fund Operating Expenses:

 

1.89%

Recoupment of fees waived and/or expenses reimbursed:(2)

 

(0.78)%

Total Annual Fund Operating Expenses After Recoupment of Fees Waived and/or Expense Reimbursement:(2)

 

1.11%

(1)    The Fund charges a $15 fee for each payment of redemption proceeds by wire transfer.

(2)    The Adviser has contractually agreed to waive or reimburse Fund expenses (excluding Acquired Fund Fees and Expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions, investment-related costs and extraordinary expenses) in order to limit the Fund’s Total Annual Operating Expenses to 1.10% through June 30, 2029. To the extent that the Adviser absorbs expenses to satisfy this cap, it may recoup a portion or all of such amounts absorbed at any time within three fiscal years after the fiscal year in which such amounts were absorbed, subject to the expense cap in place at the time recoupment is sought, which cannot exceed the expense cap at the time of the waiver. The expense limitation agreement may be terminated by the Board of the Fund at any time without penalty upon 60 days’ notice.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Alternative Energy Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$113

$353

$790

$2,007

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 17.30% of the average value of its portfolio.

Portfolio Turnover, Rate 17.30%
Guinness Atkinson Asia Focus Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy and hold shares of the Asia Focus Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.:

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)(1)

 

Redemption/Exchange Fee for shares held less than 30 days from purchase (as a percentage of amount redeemed) (plus a $15 wire fee, if applicable):

2.00%

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

 

1.00%

Distribution (12b-1) Fees:

 

None

Other Expenses:

 

1.33%

Shareholder Servicing Plan Fees

0.09%

 

All Other Expenses

1.24%

 

Total Annual Fund Operating Expenses:

 

2.33%

Fee Waiver/Expense Reimbursement:(2)

 

(0.35)%

Total Annual Fund Operating Expenses After Waiver and/or Expense Reimbursement:(2)

1.98%

(1)    The Fund charges a $15 fee for each payment of redemption proceeds by wire transfer.

(2)    The Adviser has contractually agreed to waive or reimburse Fund expenses (excluding Acquired Fund Fees and Expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions, investment-related costs and extraordinary expenses) in order to limit the Fund’s Total Annual Operating Expenses to 1.98% through June 30, 2029. To the extent that the Adviser absorbs expenses to satisfy this cap, it may recoup a portion or all of such amounts absorbed at any time within three fiscal years after the fiscal year in which such amounts were absorbed, subject to the expense cap in place at the time recoupment is sought, which cannot exceed the expense cap at the time of the waiver. The expense limitation agreement may be terminated by the Board of the Fund at any time without penalty upon 60 days’ notice.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Asia Focus Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$201

$621

$1,145

$2,580

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 16.27% of the average value of its portfolio.

Portfolio Turnover, Rate 16.27%
Guinness Atkinson China & Hong Kong Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy and hold shares of the China & Hong Kong Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)(1)

 

Redemption/Exchange Fee for shares held less than 30 days from purchase (as a percentage of amount redeemed) (plus a $15 wire fee, if applicable):

2.00%

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

 

1.00%

Distribution (12b-1) Fees:

 

None

Other Expenses:

 

0.86%

Shareholder Servicing Plan Fees

0.10%

 

Interest Expense

0.01%

 

All Other Expenses

0.75%

 

Total Annual Fund Operating Expenses:

 

1.86%

(1)    The Fund charges a $15 fee for each payment of redemption proceeds by wire transfer.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the China & Hong Kong Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$189

$585

$1,006

$2,180

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 22.23% of the average value of its portfolio.

Portfolio Turnover, Rate 22.23%
Guinness Atkinson Global Energy Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy and hold shares of the Global Energy Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

None(1)

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

 

0.75%

Distribution (12b-1) Fees:

 

None

Other Expenses:

 

1.52%

Shareholder Servicing Plan Fees

0.16%

 

Tax Expense

0.02%

 

All Other Expenses

1.34%

 

Total Annual Fund Operating Expenses:

 

2.27%

Fee Waiver/Expense Reimbursement:(2)

 

(0.80)%

Total Annual Fund Operating Expenses After Waiver and/or Expense Reimbursement:(2)

1.47%

(1)    The Fund charges a $15 fee for each payment of redemption proceeds by wire transfer.

(2)    The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding Acquired Fund Fees and Expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions, investment-related costs and extraordinary expenses) in order to limit the Fund’s Total Annual Operating Expenses to 1.45% through June 30, 2029. To the extent that the Adviser absorbs expenses to satisfy this cap, it may recoup a portion or all of such amounts absorbed at any time within three fiscal years after the fiscal year in which such amounts were absorbed, subject to the expense cap in place at the time recoupment is sought, which cannot exceed the expense cap at the time of the waiver. The expense limitation agreement may be terminated by the Board of the Fund at any time without penalty upon 60 days’ notice.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Global Energy Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$150

$465

$982

$2,405

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 9.62% of the average value of its portfolio.

Portfolio Turnover, Rate 9.62%
Guinness Atkinson Global Innovators Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy and hold shares of the Global Innovators Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

Investor Class
None(1)

Institutional Class
None
(1)

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

  

   

Management Fees:

 

0.75%

 

0.75%

Distribution (12b-1) Fees:

 

None

 

None

Other Expenses:

 

0.59%

 

0.43%

Shareholder Servicing Plan Fees

0.20%

 

None

 

Interest and Tax Expense

0.01%

 

0.01%

 

All Other Expenses

0.38%

 

0.42%

 

Total Annual Fund Operating Expenses:

 

1.34%

 

1.18%

Fee Waiver/Expense Reimbursement:(2)

 

(0.09)%

 

(0.18)%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement:(2)

 

1.25%

 

1.00%

(1)    The Fund charges a $15 fee for each payment of redemption proceeds by wire transfer.

(2)    The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding Acquired Fund Fees and Expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions, investment-related costs and extraordinary expenses) in order to limit the Fund’s Total Annual Operating Expenses for Investor Class shares and for Institutional Class shares to 1.24% and 0.99% respectively through June 30, 2029. For each share class to the extent that the Adviser absorbs expenses to satisfy this cap, it may recoup a portion or all of such amounts absorbed at any time within three fiscal years after the fiscal year in which such amounts were absorbed, subject to the expense cap in place at the time recoupment is sought, which cannot exceed the expense cap at the time of the waiver. The expense limitation agreement may be terminated by the Board of the Fund at any time without penalty upon 60 days’ notice.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Global Innovators Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

Investor Class

$127

$397

$707

$1,588

Institutional Class

$102

$318

$594

$1,381

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 15.67% of the average value of its portfolio.

Portfolio Turnover, Rate 15.67%
Guinness Atkinson Asia Pacific Dividend Builder ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of Guinness Atkinson Asia Pacific Dividend Builder ETF. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

0.75%

Distribution and Service (12b-1) Fees:

None

Other Expenses:

1.20%

Total Annual Fund Operating Expense:

1.95%

Fee Waiver/Expense Reimbursement:1

(1.17)%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement:1

0.78%

1         The Adviser has contractually agreed to reduce its fees and/or pay ETF expenses (excluding acquired fund fees and expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions and extraordinary expenses) in order to limit the Fund’s total annual fund operating expenses to 0.78% through June 30, 2029. This contractual arrangement may be terminated by the Board of the Fund at any time without penalty upon 60 days’ notice.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in Guinness Atkinson Asia Pacific Dividend Builder ETF with the cost of investing in other investment companies. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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. This Example does not include brokerage commissions that you may pay to buy and sell shares. Although your actual costs may be higher or lower, under these assumptions, your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$80

$249

$704

$1,969

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

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 the Fund’s shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund’s performance. During the Fund’s most recent fiscal year ended December 31, 2025, the Fund’s portfolio turnover rate was 18.13% of the average value of its portfolio.

Portfolio Turnover, Rate 18.13%
Guinness Atkinson Dividend Builder ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of Guinness Atkinson Dividend Builder ETF. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

 

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses1 (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses1 (expenses that you pay each year as a percentage of the value of your investments)

 

Management Fees:

 

0.45%

Distribution and Service (12b-1) Fees:

 

None

Other Expenses:

 

0.53%

Total Annual Fund Operating Expense:

 

0.98%

Fee Waiver/Expense Reimbursement:2

 

(0.53)%

Total Annual Fund Operating Expenses After Fee Waiver
and/or Expense Reimbursement:
1,2

 

0.45%

1         The expense information in the table has been restated to reflect the current annual operating expense effective February 1, 2026.

2         The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding acquired fund fees and expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions and extraordinary expenses) in order to limit the Fund’s total annual operating expenses to 0.45% through June 30, 2029. This contractual arrangement may be terminated by the Board of the Fund at any time without penalty upon 60 days’ notice.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in Guinness Atkinson Dividend Builder ETF with the cost of investing in other investment companies. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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. This Example does not include brokerage commissions that you may pay to buy and sell shares. Although your actual costs may be higher or lower, under these assumptions, your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$46

$144

$378

$1,047

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

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 Guinness Atkinson Dividend Builder ETF shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year ended December 31, 2025, the Fund’s portfolio turnover rate was 11.69% of the average value of its portfolio.

Portfolio Turnover, Rate 11.69%
Guinness Atkinson International Dividend Builder ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of Guinness Atkinson International Dividend Builder ETF. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

0.50%

Distribution and Service (12b-1) Fees

0.00%

Other Expenses:

0.00%

Total Annual Fund Operating Expense:

0.50%

Fee Waiver/Expense Reimbursement:1

(0.05)%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement:1

0.45%

1         The Fund’s advisory agreement provides that in exchange for a unitary fee, the Adviser will arrange for and pay for all routine and ordinary expenses of the Fund, except for: the management fees, Rule 12b-1 plan payments (if any), interest expenses, taxes, fees related to services for reclamation or collection of foreign taxes withheld, acquired fund fees and expenses (if any), dividends on short positions, costs of shareholder meetings and extraordinary expenses (including litigation, if any). The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding acquired fund fees and expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions, brokerage commissions and extraordinary expenses) in order to limit the Fund’s total annual operating expenses to 0.45% through June 30, 2027.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in Guinness Atkinson International Dividend Builder ETF with the cost of investing in other investment companies. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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. This Example does not include brokerage commissions that you may pay to buy and sell shares. Although your actual costs may be higher or lower, under these assumptions, your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

$46

$154

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

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 Guinness Atkinson International Dividend Builder ETF shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund’s performance. The Fund has no operating history and therefore has no portfolio turnover information.

Guinness Atkinson Real Assets Income ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of Real Assets Income ETF. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

0.50%

Distribution and Service (12b-1) Fees:

None

Other Expenses:

0.00%

Total Annual Fund Operating Expense:

0.50%

Fee Waiver/Expense Reimbursement:

(0.05)%

Total Annual Fund Operating Expenses After Fee Waiver1

0.45%

1      The Fund’s advisory agreement provides that in exchange for a unitary fee, the Adviser will arrange for and pay for all routine and ordinary expenses of the Fund, except for: the management fees, Rule 12b-1 plan payments (if any), interest expenses, taxes, fees related to services for reclamation or collection of foreign taxes withheld, acquired fund fees and expenses (if any), dividends on short positions, costs of shareholder meetings and extraordinary expenses (including litigation, if any). The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding acquired fund fees and expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions, brokerage commissions and extraordinary expenses) in order to limit the Fund’s total annual operating expenses to 0.45% through June 30, 2027.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in Guinness Atkinson Real Assets Income ETF with the cost of investing in other investment companies. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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. This Example does not include brokerage commissions that you may pay to buy and sell shares. Although your actual costs may be higher or lower, under these assumptions, your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

$46

$154

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

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 the Fund’s shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund’s performance. The Fund has no operating history and therefore has no portfolio turnover information.

Guinness Atkinson Smart Transportation & Technology ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of Guinness Atkinson Smart Transportation & Technology ETF. You may also pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

0.68%

Distribution and Service (12b-1) Fees:

None

Other Expenses:1

0.53%

Total Annual Fund Operating Expense:

1.21%

Fee Waiver/Expense Reimbursement:1

(0.53)%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement:1

0.68%

         The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding Acquired Fund Fees and Expenses, interest, taxes, dividends on short positions and extraordinary expenses) in order to limit the Fund’s Total Annual Operating Expenses to 0.68% through June 30, 2029.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in Guinness Atkinson Smart Transportation & Technology ETF with the cost of investing in other investment companies. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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. This Example does not include brokerage commissions that you may pay to buy and sell shares. Although your actual costs may be higher or lower, under these assumptions, your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$69

$218

$503

$1,316

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

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 the Fund’s shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, may affect the Fund’s performance. During the Fund’s most recent fiscal year ended December 31, 2025, the Fund’s portfolio turnover rate was 8.11% of the average value of its portfolio.

Portfolio Turnover, Rate 8.11%
Guinness Atkinson Sustainable Energy ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of Guinness Atkinson Sustainable Energy ETF. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

0.79%

Distribution and Service (12b-1) Fees:

None

Other Expenses:

3.02%

Total Annual Fund Operating Expense:

3.81%

Fee Waiver/Expense Reimbursement:1

(3.02)%

Total Annual Fund Operating Expenses after Fee Waiver/Expense Reimbursement:1

0.79%

1         The Adviser has contractually agreed to reduce its fees and/or pay ETF expenses (excluding acquired fund fees and expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions and extraordinary expenses) in order to limit the Fund’s total annual operating expenses to 0.79% through June 30, 2029.This contractual arrangement may be terminated by the Board of the Fund at any time without penalty upon 60 days’ notice.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in Guinness Atkinson Sustainable Energy ETF with the cost of investing in other investment companies. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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. This example does not include brokerage commissions that you may pay to buy and sell shares. Although your actual costs may be higher or lower, under these assumptions, your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

5 Years

10 Years

$81

$252

$1,125

$3,399

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

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 the Fund’s shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, may affect the Fund’s performance. During the Fund’s most recent fiscal year ended December 31, 2025, the Fund’s portfolio turnover rate was 18.33% of the average value of its portfolio.

Portfolio Turnover, Rate 18.33%
Guinness Atkinson US Dividend Builder ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses of the Fund
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of Guinness Atkinson US Dividend Builder ETF. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)
Annual Fund Operating Expenses [Table]

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

 

Management Fees:

0.40%

Distribution and Service (12b-1) Fees

0.00%

Other Expenses:

0.00%

Total Annual Fund Operating Expense:

0.40%

Fee Waiver/Expense Reimbursement:1

(0.05)%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement:1

0.35%

1      The Fund’s advisory agreement provides that in exchange for a unitary fee, the Adviser will arrange for and pay for all routine and ordinary expenses of the Fund, except for: the management fees, Rule 12b-1 plan payments (if any), interest expenses, taxes, fees related to services for reclamation or collection of foreign taxes withheld, acquired fund fees and expenses (if any), dividends on short positions, costs of shareholder meetings and extraordinary expenses (including litigation, if any). The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding acquired fund fees and expenses, fees related to services for reclamation or collection of foreign taxes withheld, interest, taxes, dividends on short positions, brokerage commissions and extraordinary expenses) in order to limit the Fund’s total annual operating expenses to 0.35% through June 30, 2027.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in Guinness Atkinson US Dividend Builder ETF with the cost of investing in other investment companies. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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. This Example does not include brokerage commissions that you may pay to buy and sell shares. Although your actual costs may be higher or lower, under these assumptions, your costs would be:

Expense Example, With Redemption [Table]

1 Year

3 Years

$36

$123

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

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 Guinness Atkinson US Dividend Builder ETF shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund’s performance. The Fund has no operating history and therefore has no portfolio turnover information.