PORTFOLIO INVESTMENTS AND FAIR VALUE - Quantitative information about Level 3 fair value measurements (Details)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 871,733,280	$ 772,873,326
Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	871,733,280	772,873,326
Senior SecuredLoans-First Lien
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	742,272,654	646,352,935
Senior SecuredLoans-First Lien | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	742,272,654	646,352,935
Senior SecuredLoans-First Lien | Income/Market approach | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 742,272,654	$ 646,352,935
Senior SecuredLoans-First Lien | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	(1.31)	(3.93)
Senior SecuredLoans-First Lien | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	(0.33)	(1.95)
Senior SecuredLoans-First Lien | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	3.7	4.5
Senior SecuredLoans-First Lien | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	5.10	0.48
Senior SecuredLoans-First Lien | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	3.88	0.86
Senior SecuredLoans-First Lien | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	23.6	25
Senior SecuredLoans-First Lien | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	1.68	(0.24)
Senior SecuredLoans-First Lien | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	2.72	(0.05)
Senior SecuredLoans-First Lien | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	10.7	11.6
Senior Secured Loans-Second Lien
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 58,220,675	$ 56,733,110
Senior Secured Loans-Second Lien | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	58,220,675	56,733,110
Senior Secured Loans-Second Lien | Income/Market approach | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 58,220,675	$ 56,733,110
Senior Secured Loans-Second Lien | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	(0.27)	(2.54)
Senior Secured Loans-Second Lien | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	1.18	(1.79)
Senior Secured Loans-Second Lien | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	5.8	7.1
Senior Secured Loans-Second Lien | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	2.34	0.53
Senior Secured Loans-Second Lien | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	3.91	0.94
Senior Secured Loans-Second Lien | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	18.3	16.4
Senior Secured Loans-Second Lien | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	1.39	(0.53)
Senior Secured Loans-Second Lien | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	2.59	(0.29)
Senior Secured Loans-Second Lien | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	12.5	12.9
Unsecured Debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 4,760,750	$ 4,883,854
Unsecured Debt | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	4,760,750	4,883,854
Unsecured Debt | Income/Market approach | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 4,760,750	$ 4,883,854
Unsecured Debt | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	4.65	0.25
Unsecured Debt | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	3.66	0.75
Unsecured Debt | Minimum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	9.5	12.4
Unsecured Debt | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	4.65	0.25
Unsecured Debt | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	3.66	0.75
Unsecured Debt | Maximum | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	9.5	12.4
Unsecured Debt | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | HY credit spreads
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	4.65	0.25
Unsecured Debt | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | Risk free rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	3.66	0.75
Unsecured Debt | Weighted average | Income/Market approach | Significant Unobservable Inputs (Level 3) | Market multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt	9.5	12.4
Equity Securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 66,479,201	$ 64,903,427
Equity Securities | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	66,479,201	64,903,427
Equity Securities | Market approach | Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of investments	$ 66,479,201	$ 64,903,427
Equity Securities | Minimum | Market approach | Significant Unobservable Inputs (Level 3) | Underwriting EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments	1.1	1.6
Equity Securities | Maximum | Market approach | Significant Unobservable Inputs (Level 3) | Underwriting EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments	24.6	24.9
Equity Securities | Weighted average | Market approach | Significant Unobservable Inputs (Level 3) | Underwriting EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments	11.5	11.5