CastleArk Large Growth ETF CastleArk Large Growth ETF Shares Equity Risk Market Risk Non-Diversification Risk Sector Focus Risk Growth Investment Style Risk Mid-Capitalization Company Risk Large Capitalization Company Risk Portfolio Turnover Risk Active Management Risk ETF Risks Russell 1000 Index Return (reflects no deductions for fees, expenses, or taxes) Russell 1000 Growth Index Return (reflects no deductions for fees, expenses, or taxes) Frontier Asset Absolute Return ETF Frontier Asset Absolute Return ETF Shares Small- and Mid-Capitalization Company Risk Preferred Stock Risk Convertible Securities Risk REITs Risk Investment in Other Investment Companies Risk Fixed-Income Securities Risk Commodities Risk Currency Risk Derivatives Risk Interest Rate Risk [Member] High Yield Bond Risk Non-U.S. Government Securities Risk Corporate Fixed Income Securities Risk Commercial Paper Risk Credit Risk [Member] U.S. Government Securities Risk Foreign Government Agencies Risk Municipal Securities Risk Residential Mortgage-Backed Securities Risk Commercial Mortgage-Backed Securities Risk Prepayment and Extension Risk Asset-Backed Securities Risk Inflation Linked Securities Risk Foreign Company Risk Emerging Markets Securities Risk Foreign Currency Risk Bank Loans Risk Collateralized Loan Obligations CLOs Risk Collateralized Mortgage Obligations CMOs Risk Money Market Instruments Risk Liquidity Risk Valuation Risk Morningstar Developed Markets All Cap Target Market Exposure Index (Net) (USD) (reflects no deductions for fees, expenses or taxes (except foreign withholding taxes)) HFR (HFRX) Global Hedge Fund Index (USD) (reflects no deductions for fees, expenses or taxes) Frontier Asset Core Bond ETF Frontier Asset Core Bond ETF Shares Investing in the United States Risk Inflation Protected Securities Risk Morningstar US Core Bond Index (USD) (reflects no deductions for fees, expenses or taxes) Frontier Asset Opportunistic Credit ETF Frontier Asset Opportunistic Credit ETF Shares Mortgage-Backed Securities Risk Morningstar US Core Plus Bond Index (USD) (reflects no deductions for fees, expenses or taxes) Frontier Asset Global Small Cap Equity ETF Frontier Asset Global Small Cap Equity ETF Shares Small-Capitalization Companies Risk Mid-Capitalization Companies Risk Value Investment Style Risk Depositary Receipts Risk Morningstar Developed Markets All Cap Target Market Exposure Index (Net) (USD) (reflects no deductions for fees, expenses or taxes (except foreign withholding taxes)) Morningstar Developed Markets Small Cap Index (Net) (USD) (reflects no deductions for fees, expenses or taxes (except foreign withholding taxes)) Frontier Asset Total International Equity ETF Frontier Asset Total International Equity ETF Shares Large Capitalization Risk Morningstar Global Markets ex US Index (Net) (USD) (reflects no deductions for fees, expenses or taxes (except foreign withholding taxes)) Frontier Asset U.S. Large Cap Equity ETF Frontier Asset U.S. Large Cap Equity ETF Shares Morningstar US Large Cap Index (USD) (reflects no deductions for fees, expenses or taxes) KOPERNIK GLOBAL ALL-CAP FUND CLASS A SHARES CLASS I SHARES ForeignEmerging and Frontier Market Security Risk Small and Medium Capitalization Companies Risk Geographic Focus Risk Sanctions Risk Convertible and Preferred Securities Risk Private Placements Risk MSCI All Country World Index (Net) (reflects no deduction for fees, expenses or taxes (except foreign withholding taxes)) KOPERNIK INTERNATIONAL FUND INVESTOR CLASS SHARES CLASS I SHARES MSCI All Country World Index ex-US (Net) (reflects no deduction for fees, expenses or taxes (except foreign withholding taxes)) PMV Adaptive Risk Parity ETF PMV Adaptive Risk Parity ETF Shares Asset Allocation Risk Investing in ETPs Risk Equity Market Risk Foreign Securities Risk Emerging Markets Risk Gold Risk Large Capitalization Companies Risk Momentum Risk Tax Risk Large Purchase and Redemption Risk Quantitative Investing Risk Management Risk Operational Risk Morningstar US Core Bond Index (reflects no deduction for fees, expenses or taxes) Morningstar Developed Markets All Cap Target Market Exposure Index (Net) (USD) (reflects no deductions for fees, expenses or taxes (except foreign withholding taxes)), Frontier Asset Global Small Cap Equity ETF Class I Shares