Fair Value of Financial Instruments - Investments Categorization in Fair Value Hierarchy (Detail) - USD ($)	Dec. 31, 2021		Dec. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 455,996,741	[1],[2]	$ 231,197,454	[3],[4]
Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0		0
Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0		0
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	455,996,741		231,197,454
Total Senior Secured Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	152,542,454	[1],[2]	78,042,454	[3],[4]
Total Senior Secured Notes | Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0		0
Total Senior Secured Notes | Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0		0
Total Senior Secured Notes | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	152,542,454		78,042,454
Equity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	303,454,287	[1],[2]	153,155,000	[3],[4]
Equity | Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0		0
Equity | Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0		0
Equity | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 303,454,287		$ 153,155,000

[1] Percentages represent fair value as a percentage of net assets for each investment category.

[2] Security may be an obligation of one or more entities affiliated with the named company.

[3] Percentages represent fair value as a percentage of net assets for each investment category.

[4] Security may be an obligation of one or more entities affiliated with the named company.