Concentrations of Credit Risk - Allocation of Oil and Gas Investments by Type (Details) - Oil and Gas Industry [Member] - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Concentrations of Credit Risk [Abstract]
Fixed maturities, at fair value	$ 1,046,210	$ 1,061,720
Equity securities, at fair value	157,498,921	136,129,315
Equity securities, at cost	3,696,763	3,904,565
Investment real estate	9,438,515	9,879,784
Notes receivable	1,875,000	1,875,000
Total investments	173,555,409	152,850,384
Land, Minerals & Royalty Interests [Member]
Concentrations of Credit Risk [Abstract]
Fixed maturities, at fair value	0	0
Equity securities, at fair value	157,498,921	136,129,315
Equity securities, at cost	3,696,763	3,904,565
Investment real estate	9,438,515	9,879,784
Notes receivable	1,875,000	1,875,000
Total investments	172,509,199	151,788,664
Exploration [Member]
Concentrations of Credit Risk [Abstract]
Fixed maturities, at fair value	1,046,210	1,061,720
Equity securities, at fair value	0	0
Equity securities, at cost	0	0
Investment real estate	0	0
Notes receivable	0	0
Total investments	$ 1,046,210	$ 1,061,720