PORTFOLIO INVESTMENTS AND FAIR VALUE - Fair Values of Investments Disaggregated into Three Levels of Fair Value Hierarchy (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	$ 844,733,638	$ 772,873,326
Senior SecuredLoans-First Lien
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	735,555,508	646,352,935
Senior Secured Loans-Second Lien
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	45,304,300	56,733,110
Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	4,823,898	4,883,854
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	59,049,932	64,903,427
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	844,733,638	772,873,326
Significant Unobservable Inputs (Level 3) | Senior SecuredLoans-First Lien
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	735,555,508	646,352,935
Significant Unobservable Inputs (Level 3) | Senior Secured Loans-Second Lien
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	45,304,300	56,733,110
Significant Unobservable Inputs (Level 3) | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	4,823,898	4,883,854
Significant Unobservable Inputs (Level 3) | Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investments	$ 59,049,932	$ 64,903,427