v3.25.2
Shareholder Report, Average Annual Return (Details)
 6 Months Ended 12 Months Ended 60 Months Ended 120 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2025
Guinness Atkinson Alternative Energy Fund        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       Alternative Energy Fund
Average Annual Return, Percent 12.13% 2.61% 9.88% 4.89%
Guinness Atkinson Asia Focus Fund        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       Asia Focus Fund
Average Annual Return, Percent 14.43% 19.02% 2.96% 3.95%
Guinness Atkinson China & Hong Kong Fund        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       China & Hong Kong Fund
Average Annual Return, Percent 11.70% 21.70% (2.96%) 0.36%
Guinness Atkinson Global Energy Fund        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       Global Energy Fund
Average Annual Return, Percent 5.31% (6.07%) 18.36% 1.56%
Guinness Atkinson Global Innovators Fund | Investor Class        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       Global Innovators Fund - Investor Class
Average Annual Return, Percent 10.32% 11.42% 14.91% 13.33%
Guinness Atkinson Global Innovators Fund | Institutional Class        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       Global Innovators Fund - Institutional Class
Average Annual Return, Percent 10.46% 11.69% 15.19% 13.60%
Guinness Atkinson Alternative Energy Fund | MSCI World Index (Net Return)        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       MSCI World Index (Net Return)
Average Annual Return, Percent 9.47% 16.26% 14.55% 10.66%
Guinness Atkinson Asia Focus Fund | MSCI AC Far East ex Japan Index (Net Return)        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       MSCI AC Far East ex Japan Index (Net Return)
Average Annual Return, Percent 16.88% 21.69% 4.86% 4.84%
Guinness Atkinson China & Hong Kong Fund | MSCI China Index (Net Return)        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       MSCI China Index (Net Return)
Average Annual Return, Percent 17.33% 33.78% (0.99%) 2.11%
Guinness Atkinson Global Energy Fund | MSCI World Index (Net Return)        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       MSCI World Index (Net Return)
Average Annual Return, Percent 9.47% 16.26% 14.55% 10.66%
Guinness Atkinson Global Innovators Fund | Investor Class | MSCI World Index (Net Return)        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       MSCI World Index (Net Return)
Average Annual Return, Percent 9.47% 16.26% 14.55% 10.66%
Guinness Atkinson Global Innovators Fund | Institutional Class | MSCI World Index (Net Return)        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       MSCI World Index (Net Return)
Average Annual Return, Percent 9.47% 16.26% 14.55% 10.66%
Guinness Atkinson Global Energy Fund | MSCI World Energy Index (Net Return)        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name       MSCI World Energy Index (Net Return)
Average Annual Return, Percent 4.56% (0.84%) 19.12% 4.58%