KraneShares Photonic and Optical ETF Artificial Intelligence Technology Risk [Member] Semiconductor Industry Risk [Member] Photonics Industry Risk [Member] China Risk [Member] Private Company Risk [Member] Ipo Risk [Member] Concentration Risk [Member] Information Technology Sector Risk [Member] Management Risk [Member] New Fund Risk [Member] Developed Markets Risk [Member] Emerging Markets Risk [Member] Foreign Securities Risk [Member] Currency Risk [Member] Depositary Receipts Risk [Member] Liquidity Risk [Member] Etf Risk [Member] Large Capitalization Company Risk [Member] Small And Midcapitalization Company Risk [Member] Nondiversified Fund Risk [Member] Equity Securities Risk [Member] Market Risk [Member] Valuation Risk [Member] Large Shareholder Risk [Member] Investments In Investment Companies Risk [Member] Tax Risk [Member] Securities Lending Risk [Member] Derivatives Risk [Member] Cash And Cash Equivalents Risk [Member] Operational And Cybersecurity Risk [Member] KraneShares Photonic and Optical ETF KraneShares Photonic and Optical ETF [Default Label]