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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Amount of investment in marketable security.

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Fair Value Measurements - Fair Value Measurements Carried at Fair Value on a Recurring Basis (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale debt securities	$ 1,191,299	$ 963,178	$ 1,129,263	$ 1,148,653
Derivatives	0	75	$ 78,496	$ 83,807
Total	200,270,289	278,537,218
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	3,601,642	3,324,189
Fair Value, Recurring \| Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale debt securities	1,191,299	963,178
Fair Value, Recurring \| Money market fund
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market fund	2,410,343	2,360,936
Fair Value, Recurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	3,601,642	3,324,114
Fair Value, Recurring \| Level 1 \| Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale debt securities	1,191,299	963,178
Fair Value, Recurring \| Level 1 \| Money market fund
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market fund	2,410,343	2,360,936
Fair Value, Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	0	75
Fair Value, Recurring \| Level 2 \| Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale debt securities	0	0
Fair Value, Recurring \| Level 2 \| Money market fund
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market fund	0	0
Fair Value, Recurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	0	0
Fair Value, Recurring \| Level 3 \| Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale debt securities	0	0
Fair Value, Recurring \| Level 3 \| Money market fund
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market fund	0	0
Fair Value, Recurring \| Derivative - interest rate cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivatives	0	75
Fair Value, Recurring \| Derivative - interest rate cap \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivatives	0	0
Fair Value, Recurring \| Derivative - interest rate cap \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivatives	0	75
Fair Value, Recurring \| Derivative - interest rate cap \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivatives	$ 0	$ 0