v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
Guinness Atkinson Alternative Energy Fund | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 44.90%
Guinness Atkinson Alternative Energy Fund | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
Guinness Atkinson Alternative Energy Fund | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Guinness Atkinson Alternative Energy Fund | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Guinness Atkinson Alternative Energy Fund | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Guinness Atkinson Alternative Energy Fund | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Alternative Energy Fund | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Guinness Atkinson Alternative Energy Fund | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Guinness Atkinson Alternative Energy Fund | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Guinness Atkinson Alternative Energy Fund | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Guinness Atkinson Alternative Energy Fund | DENMARK  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Guinness Atkinson Alternative Energy Fund | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Guinness Atkinson Alternative Energy Fund | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Guinness Atkinson Alternative Energy Fund | Amphenol Corp  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Guinness Atkinson Alternative Energy Fund | Iberdrola SA  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Guinness Atkinson Alternative Energy Fund | Eaton Corp PLC  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Guinness Atkinson Alternative Energy Fund | Schneider Electric SE  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Guinness Atkinson Alternative Energy Fund | Hubbell Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Guinness Atkinson Alternative Energy Fund | Prysmian SpA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Alternative Energy Fund | Trane Technologies PLC  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Alternative Energy Fund | Infineon Technologies AG  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Alternative Energy Fund | Siemens AG  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Alternative Energy Fund | Legrand SA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Asia Focus Fund | Electronic Components - Semiconductor  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
Guinness Atkinson Asia Focus Fund | Electronic Component Miscellaneous  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
Guinness Atkinson Asia Focus Fund | Semiconductor Components - Integrated Circuits  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
Guinness Atkinson Asia Focus Fund | E-Commerce/Services  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Guinness Atkinson Asia Focus Fund | Photo Equipment & Supplies  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Guinness Atkinson Asia Focus Fund | Commercial Banks  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Guinness Atkinson Asia Focus Fund | Auto/Truck Parts & Equipment  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson Asia Focus Fund | Entertainment Software  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Asia Focus Fund | Banks  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Guinness Atkinson Asia Focus Fund | Machinery - General Industries  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Guinness Atkinson Asia Focus Fund | Machinery - Industrial Machinery  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Asia Focus Fund | Machinery  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Asia Focus Fund | Internet Application Software  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Asia Focus Fund | Auto - Cars/Light Trucks  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Asia Focus Fund | Insurance  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Guinness Atkinson Asia Focus Fund | Metal Processors & Fabricators  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Guinness Atkinson Asia Focus Fund | Food - Dairy Products  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Guinness Atkinson Asia Focus Fund | Machinery - Construction & Mining  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Guinness Atkinson Asia Focus Fund | MRI/Medical Diagnostic Imaging  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Guinness Atkinson Asia Focus Fund | Medical Products  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Guinness Atkinson Asia Focus Fund | E-Commerce/Products  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Guinness Atkinson Asia Focus Fund | Rental Auto/Equipment  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Guinness Atkinson Asia Focus Fund | Personal Care Products  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Guinness Atkinson Asia Focus Fund | Internet & Direct Marketing Retail  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Guinness Atkinson Asia Focus Fund | Textile - Apparel  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Guinness Atkinson Asia Focus Fund | Pharmaceuticals  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Guinness Atkinson Asia Focus Fund | Travel Services  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Guinness Atkinson Asia Focus Fund | Samsung Electronics Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Guinness Atkinson Asia Focus Fund | Elite Material Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
Guinness Atkinson Asia Focus Fund | Taiwan Semiconductor Manufacturing Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
Guinness Atkinson Asia Focus Fund | Applied Materials Inc  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Guinness Atkinson Asia Focus Fund | Largan Precision Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Guinness Atkinson Asia Focus Fund | DBS Group Holdings  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Guinness Atkinson Asia Focus Fund | Weichai Power Co Ltd - H Shares  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson Asia Focus Fund | NetEase Inc - ADR  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Asia Focus Fund | HDFC Bank Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Guinness Atkinson Asia Focus Fund | Broadcom Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Guinness Atkinson China & Hong Kong Fund | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 92.60%
Guinness Atkinson China & Hong Kong Fund | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
Guinness Atkinson China & Hong Kong Fund | Weichai Power Co Ltd - H Shares  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson China & Hong Kong Fund | NetEase Inc - ADR  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Guinness Atkinson China & Hong Kong Fund | Hongfa Technology Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Guinness Atkinson China & Hong Kong Fund | Hangzhou First Applied Materials  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Guinness Atkinson China & Hong Kong Fund | Tencent Holdings Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson China & Hong Kong Fund | Midea Group Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Guinness Atkinson China & Hong Kong Fund | Inner Mongolia Yili - A Shares  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson China & Hong Kong Fund | AIA Group Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson China & Hong Kong Fund | Baidu Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson China & Hong Kong Fund | Shenzhen Inovance Technology Co Ltd.  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Global Energy Fund | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 45.10%
Guinness Atkinson Global Energy Fund | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Guinness Atkinson Global Energy Fund | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Guinness Atkinson Global Energy Fund | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Guinness Atkinson Global Energy Fund | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Guinness Atkinson Global Energy Fund | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Global Energy Fund | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Guinness Atkinson Global Energy Fund | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 20.30%
Guinness Atkinson Global Energy Fund | AUSTRIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Guinness Atkinson Global Energy Fund | PORTUGAL  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Guinness Atkinson Global Energy Fund | NORWAY  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Guinness Atkinson Global Energy Fund | Exxon Mobil Corp  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Guinness Atkinson Global Energy Fund | Valero Energy Corp  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Guinness Atkinson Global Energy Fund | TotalEnergies SE  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Guinness Atkinson Global Energy Fund | Chevron Corp  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Guinness Atkinson Global Energy Fund | BP PLC  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Guinness Atkinson Global Energy Fund | Shell PLC  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Global Energy Fund | ConocoPhillips  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Guinness Atkinson Global Energy Fund | Repsol SA  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Guinness Atkinson Global Energy Fund | Canadian Natural Resources Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Guinness Atkinson Global Energy Fund | Cenovus Energy Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Investor Class | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 75.00%
Guinness Atkinson Global Innovators Fund - Investor Class | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Guinness Atkinson Global Innovators Fund - Investor Class | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Guinness Atkinson Global Innovators Fund - Investor Class | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Guinness Atkinson Global Innovators Fund - Investor Class | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Guinness Atkinson Global Innovators Fund - Investor Class | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson Global Innovators Fund - Investor Class | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Investor Class | Britain  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Global Innovators Fund - Investor Class | Amphenol Corp  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Investor Class | Taiwan Semiconductor Manufacturing Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson Global Innovators Fund - Investor Class | Applied Materials Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Guinness Atkinson Global Innovators Fund - Investor Class | Broadcom Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Investor Class | KLA-Tencor Corp  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Guinness Atkinson Global Innovators Fund - Investor Class | Lam Research Corp  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Guinness Atkinson Global Innovators Fund - Investor Class | Advanced Micro Devices Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Guinness Atkinson Global Innovators Fund - Investor Class | ABB Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Investor Class | Alphabet Inc - A Shares  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Global Innovators Fund - Investor Class | Amazon.com Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Global Innovators Fund - Institutional Class | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 75.00%
Guinness Atkinson Global Innovators Fund - Institutional Class | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Guinness Atkinson Global Innovators Fund - Institutional Class | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Guinness Atkinson Global Innovators Fund - Institutional Class | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Guinness Atkinson Global Innovators Fund - Institutional Class | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Guinness Atkinson Global Innovators Fund - Institutional Class | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson Global Innovators Fund - Institutional Class | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Institutional Class | Britain  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Global Innovators Fund - Institutional Class | Amphenol Corp  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Institutional Class | Taiwan Semiconductor Manufacturing Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson Global Innovators Fund - Institutional Class | Applied Materials Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Guinness Atkinson Global Innovators Fund - Institutional Class | Broadcom Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Institutional Class | KLA-Tencor Corp  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Guinness Atkinson Global Innovators Fund - Institutional Class | Lam Research Corp  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Guinness Atkinson Global Innovators Fund - Institutional Class | Advanced Micro Devices Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Guinness Atkinson Global Innovators Fund - Institutional Class | ABB Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Guinness Atkinson Global Innovators Fund - Institutional Class | Alphabet Inc - A Shares  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Global Innovators Fund - Institutional Class | Amazon.com Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Financial  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Consumer, Cyclical  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Industrial  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Consumer, Non-cyclical  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Elite Material Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Taiwan Semiconductor Manufacturing Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Guinness Atkinson Asia Pacific Dividend Builder ETF | DBS Group Holdings  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Asia Pacific Dividend Builder ETF | NetEase Inc - ADR  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Broadcom Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Novatek Microelectronics Corp  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Asia Pacific Dividend Builder ETF | BOC Hong Kong Holdings Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Industrial & Commercial Bank of China Ltd - H Shares  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Guinness Atkinson Asia Pacific Dividend Builder ETF | China Construction Bank Corp - H Shares  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Guinness Atkinson Asia Pacific Dividend Builder ETF | Nien Made Enterprise Co  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Dividend Builder ETF | Financial  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
Guinness Atkinson Dividend Builder ETF | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 16.70%
Guinness Atkinson Dividend Builder ETF | Consumer, Cyclical  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Guinness Atkinson Dividend Builder ETF | Industrial  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
Guinness Atkinson Dividend Builder ETF | Consumer, Non-cyclical  
Holdings [Line Items]  
Percent of Net Asset Value 36.60%
Guinness Atkinson Dividend Builder ETF | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Guinness Atkinson Dividend Builder ETF | Eaton Corp PLC  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Dividend Builder ETF | Taiwan Semiconductor Manufacturing Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Dividend Builder ETF | Broadcom Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Guinness Atkinson Dividend Builder ETF | ABB Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Dividend Builder ETF | Cisco Systems Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Guinness Atkinson Dividend Builder ETF | Texas Instruments Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Guinness Atkinson Dividend Builder ETF | AbbVie Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Dividend Builder ETF | Publicis Groupe SA  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Guinness Atkinson Dividend Builder ETF | The Coca-Cola Co - ADR  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Dividend Builder ETF | Johnson & Johnson  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Real Assets Income ETF | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 40.50%
Guinness Atkinson Real Assets Income ETF | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Guinness Atkinson Real Assets Income ETF | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Guinness Atkinson Real Assets Income ETF | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
Guinness Atkinson Real Assets Income ETF | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Guinness Atkinson Real Assets Income ETF | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Guinness Atkinson Real Assets Income ETF | Britain  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
Guinness Atkinson Real Assets Income ETF | NEW ZEALAND  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Guinness Atkinson Real Assets Income ETF | BELGIUM  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Guinness Atkinson Real Assets Income ETF | JERSEY  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Guinness Atkinson Real Assets Income ETF | BERMUDA  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Guinness Atkinson Real Assets Income ETF | SINGAPORE  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Guinness Atkinson Real Assets Income ETF | Iberdrola SA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Guinness Atkinson Real Assets Income ETF | Infratil Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Guinness Atkinson Real Assets Income ETF | Elia Group SA/NV  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Guinness Atkinson Real Assets Income ETF | Welltower Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Real Assets Income ETF | Equinix Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Real Assets Income ETF | Ventas Inc  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Real Assets Income ETF | Union Pacific Corp  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Real Assets Income ETF | 3i Infrastructure PLC  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Guinness Atkinson Real Assets Income ETF | American Electric Power Co Inc  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Guinness Atkinson Real Assets Income ETF | Greencoat UK Wind PLC/Funds  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Guinness Atkinson Smart Transportation & Technology ETF | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
Guinness Atkinson Smart Transportation & Technology ETF | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
Guinness Atkinson Smart Transportation & Technology ETF | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Guinness Atkinson Smart Transportation & Technology ETF | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Guinness Atkinson Smart Transportation & Technology ETF | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Guinness Atkinson Smart Transportation & Technology ETF | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Guinness Atkinson Smart Transportation & Technology ETF | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Guinness Atkinson Smart Transportation & Technology ETF | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Guinness Atkinson Smart Transportation & Technology ETF | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Guinness Atkinson Smart Transportation & Technology ETF | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Guinness Atkinson Smart Transportation & Technology ETF | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
Guinness Atkinson Smart Transportation & Technology ETF | ISRAEL  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Guinness Atkinson Smart Transportation & Technology ETF | Amphenol Corp  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Guinness Atkinson Smart Transportation & Technology ETF | Eaton Corp PLC  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Guinness Atkinson Smart Transportation & Technology ETF | Infineon Technologies AG  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Guinness Atkinson Smart Transportation & Technology ETF | Siemens AG  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Guinness Atkinson Smart Transportation & Technology ETF | Taiwan Semiconductor Manufacturing Co Ltd  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Guinness Atkinson Smart Transportation & Technology ETF | Quanta Services Inc  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
Guinness Atkinson Smart Transportation & Technology ETF | Analog Devices Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Guinness Atkinson Smart Transportation & Technology ETF | Alphabet Inc  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Guinness Atkinson Smart Transportation & Technology ETF | NVIDIA Corp  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Guinness Atkinson Smart Transportation & Technology ETF | Renesas Electronics Corp  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%