v3.26.1
Expense Example
Dec. 31, 2025
USD ($)
Guinness Atkinson Alternative Energy Fund | Guinness Atkinson Alternative Energy Fund  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 113
Expense Example, with Redemption, 3 Years 353
Expense Example, with Redemption, 5 Years 790
Expense Example, with Redemption, 10 Years 2,007
Guinness Atkinson Asia Focus Fund | Guinness Atkinson Asia Focus Fund  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 201
Expense Example, with Redemption, 3 Years 621
Expense Example, with Redemption, 5 Years 1,145
Expense Example, with Redemption, 10 Years 2,580
Guinness Atkinson China & Hong Kong Fund | Guinness Atkinson China & Hong Kong Fund  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 189
Expense Example, with Redemption, 3 Years 585
Expense Example, with Redemption, 5 Years 1,006
Expense Example, with Redemption, 10 Years 2,180
Guinness Atkinson Global Energy Fund | Guinness Atkinson Global Energy Fund  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 150
Expense Example, with Redemption, 3 Years 465
Expense Example, with Redemption, 5 Years 982
Expense Example, with Redemption, 10 Years 2,405
Guinness Atkinson Global Innovators Fund | Guinness Atkinson Global Innovators Fund - Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 127
Expense Example, with Redemption, 3 Years 397
Expense Example, with Redemption, 5 Years 707
Expense Example, with Redemption, 10 Years 1,588
Guinness Atkinson Global Innovators Fund | Guinness Atkinson Global Innovators Fund - Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 102
Expense Example, with Redemption, 3 Years 318
Expense Example, with Redemption, 5 Years 594
Expense Example, with Redemption, 10 Years 1,381
Guinness Atkinson Asia Pacific Dividend Builder ETF | Guinness Atkinson Asia Pacific Dividend Builder ETF  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 80
Expense Example, with Redemption, 3 Years 249
Expense Example, with Redemption, 5 Years 704
Expense Example, with Redemption, 10 Years 1,969
Guinness Atkinson Dividend Builder ETF | Guinness Atkinson Dividend Builder ETF  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 144
Expense Example, with Redemption, 5 Years 378
Expense Example, with Redemption, 10 Years 1,047
Guinness Atkinson International Dividend Builder ETF | Guinness Atkinson International Dividend Builder ETF  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 154
Guinness Atkinson Real Assets Income ETF | Guinness Atkinson Real Assets Income ETF  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 154
Guinness Atkinson Smart Transportation & Technology ETF | Guinness Atkinson Smart Transportation & Technology ETF  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 69
Expense Example, with Redemption, 3 Years 218
Expense Example, with Redemption, 5 Years 503
Expense Example, with Redemption, 10 Years 1,316
Guinness Atkinson Sustainable Energy ETF | Guinness Atkinson Sustainable Energy ETF  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 81
Expense Example, with Redemption, 3 Years 252
Expense Example, with Redemption, 5 Years 1,125
Expense Example, with Redemption, 10 Years 3,399
Guinness Atkinson US Dividend Builder ETF | Guinness Atkinson US Dividend Builder ETF  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years $ 123