v3.26.1
Label Element Value
Advisor Class C | Texas Pacific Land Corp. [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 47.30%
Advisor Class C | Grayscale Bitcoin Trust ETF [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 9.00%
Advisor Class C | Hawaiian Electric Industries, Inc. [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 7.20%
Advisor Class C | WaterBridge Infrastructure LLC [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 4.70%
Advisor Class C | Landbridge Co. LLC [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 4.30%
Advisor Class C | Miami International Holdings, Inc. [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.80%
Advisor Class C | Bolt Data & Energy Inc. [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.00%
Advisor Class C | Partners Value Investments LP [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.00%
Advisor Class C | White Mountains Insurance Group Ltd. [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 1.30%
Advisor Class C | Permian Basin Royalty Trust [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 1.10%
Advisor Class C | Oil and Gas Extraction [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 48.80%
Advisor Class C | Cash & Other [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 12.80%
Advisor Class C | Securities, Commodity Contracts, and Other Financial Investments and Related Activities [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 9.10%
Advisor Class C | Electric Power Generation, Transmission and Distribution [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 7.20%
Advisor Class C | Water, Sewage and Other Systems [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 4.70%
Advisor Class C | Offices of Real Estate Agents and Brokers [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 4.30%
Advisor Class C | Other Investment Pools and Funds [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.80%
Advisor Class C | Management of Companies and Enterprises [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.70%
Advisor Class C | Securities and Commodities Exchanges [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.70%
Advisor Class C | Other Financial Investment Activities [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.60%
Advisor Class C | Computer Systems Design and Related Services [Member]  
Holdings [Line Items] oef_HoldingsLineItems  
Percent of Total Investments oef_PctOfTotalInv 2.30%