NELSON SELECT ETF NELSON SELECT ETF [Member] ADR Risk [Member] Allocation Risk [Member] Asset-Backed and Mortgage-Backed Securities Risk [Member] Cash and Cash Equivalents Risk [Member] Corporate Bond Risk [Member] Futures Risk [Member] Emerging Markets Risk [Member] ETF Structure Risk [Member] Exchange Traded Funds Risk [Member] Fixed Income Risk [Member] Below Investment Grade Securities Risk [Member] Foreign Risk [Member] Large Capitalization Stock Risk [Member] Management Risk [Member] Market and Geopolitical Risk [Member] Master-Limited Partnership (MLP) Risk [Member] Money Market Risk [Member] Options Risk [Member] Portfolio Turnover Risk [Member] Preferred Stock Risk [Member] Real Estate Investment Trust (REIT) Risk [Member] Small and Medium Capitalization Stock Risk [Member] U.S. Treasuries Risk [Member] NELSON SELECT ETF. NELSON SELECT ETF. U.S. Treasuries Risk. Small and Medium Capitalization Stock Risk. Real Estate Investment Trust (REIT) Risk. Preferred Stock Risk. Portfolio Turnover Risk. Options Risk. Money Market Risk. Master-Limited Partnership (MLP) Risk. Market and Geopolitical Risk. Management Risk. Large Capitalization Stock Risk. Foreign Risk. Below Investment Grade Securities Risk. Fixed Income Risk. Exchange Traded Funds Risk. ETF Structure Risk. Emerging Markets Risk. Futures Risk. Corporate Bond Risk. Cash and Cash Equivalents Risk. Asset-Backed and Mortgage-Backed Securities Risk. Allocation Risk. ADR Risk.