v3.26.1
Concentrations - Allocation of Oil and Gas Investments by Type (Details) - Oil and Gas Industry [Member] - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Concentrations [Abstract]    
Fixed maturities, at fair value $ 1,038,460 $ 1,061,720
Equity securities, at fair value 153,831,581 136,129,315
Equity securities, at cost 3,326,613 3,904,565
Investment real estate 9,110,629 9,879,784
Notes receivable   1,875,000
Total investments 167,307,283 152,850,384
Land, Minerals & Royalty Interests [Member]    
Concentrations [Abstract]    
Fixed maturities, at fair value 0 0
Equity securities, at fair value 153,831,581 136,129,315
Equity securities, at cost 3,326,613 3,904,565
Investment real estate 9,110,629 9,879,784
Notes receivable   1,875,000
Total investments 166,268,823 151,788,664
Exploration [Member]    
Concentrations [Abstract]    
Fixed maturities, at fair value 1,038,460 1,061,720
Equity securities, at fair value 0 0
Equity securities, at cost 0 0
Investment real estate 0 0
Notes receivable   0
Total investments $ 1,038,460 $ 1,061,720