Fair Value Measurements, Quantitative Information About Level 3 (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2023
Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Certain Level 3 Instruments [Abstract]
Financial assets, fair value	$ 87,642,291	$ 85,719,579	$ 60,412,440
Equity Securities [Member]
Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Certain Level 3 Instruments [Abstract]
Financial assets, fair value	87,642,291	85,719,579
Equity Securities [Member] | Common Stock [Member]
Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Certain Level 3 Instruments [Abstract]
Financial assets, fair value	3,253,225	3,064,983	2,807,634
Equity Securities [Member] | Limited Liability Companies [Member]
Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Certain Level 3 Instruments [Abstract]
Financial assets, fair value	84,389,066	82,654,596	$ 57,604,806
Pricing Model [Member] | Equity Securities [Member] | Common Stock [Member]
Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Certain Level 3 Instruments [Abstract]
Financial assets, fair value	3,253,225	3,064,983
Pricing Model [Member] | Equity Securities [Member] | Limited Liability Companies [Member]
Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Certain Level 3 Instruments [Abstract]
Financial assets, fair value	$ 84,389,066	$ 82,654,596