Investments - Cost and Estimated Fair Value of Equity Securities (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Investments [Abstract]
Cost	$ 27,554,000	$ 27,238,000
Gross gains	21,326,000	17,193,000
Gross losses	0	61,000
Estimated fair value	$ 48,879,905	$ 44,370,358

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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+ Details