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DERIVATIVE INSTRUMENTS - Schedule of Unobservable Inputs used in Valuation of Company’s Level 3 MVC Credit Support Agreement (Details) - Barings LLC	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
MVC Credit Support Agreement
Derivative [Line Items]
Fair Value	$ 13,272,000	$ 12,386,000
MVC Credit Support Agreement | Minimum | Discount Rate | Income Approach
Derivative [Line Items]
Measurement input	0.065	0.071
MVC Credit Support Agreement | Maximum | Discount Rate | Income Approach
Derivative [Line Items]
Measurement input	0.075	0.081
MVC Credit Support Agreement | Weighted Average | Discount Rate | Income Approach
Derivative [Line Items]
Measurement input	0.070	0.076
Sierra Credit Support Agreement
Derivative [Line Items]
Fair Value	$ 45,400,000	$ 40,700,000
Sierra Credit Support Agreement | Minimum | Enterprise Value | Simulation Analysis
Derivative [Line Items]
Measurement input	100	100
Sierra Credit Support Agreement | Minimum | Asset Volatility | Simulation Analysis
Derivative [Line Items]
Measurement input	0.400	0.375
Sierra Credit Support Agreement | Minimum | Time Until Exit (years) | Simulation Analysis
Derivative [Line Items]
Measurement input	0.0	0.0
Sierra Credit Support Agreement | Minimum | Recovery Rate | Simulation Analysis
Derivative [Line Items]
Measurement input	0.000	0.000
Sierra Credit Support Agreement | Maximum | Enterprise Value | Simulation Analysis
Derivative [Line Items]
Measurement input	141,100	403,500
Sierra Credit Support Agreement | Maximum | Asset Volatility | Simulation Analysis
Derivative [Line Items]
Measurement input	0.700	0.700
Sierra Credit Support Agreement | Maximum | Time Until Exit (years) | Simulation Analysis
Derivative [Line Items]
Measurement input	8.8	9.1
Sierra Credit Support Agreement | Maximum | Recovery Rate | Simulation Analysis
Derivative [Line Items]
Measurement input	0.700	0.700
Sierra Credit Support Agreement | Weighted Average | Enterprise Value | Simulation Analysis
Derivative [Line Items]
Measurement input	70,600	201,800
Sierra Credit Support Agreement | Weighted Average | Asset Volatility | Simulation Analysis
Derivative [Line Items]
Measurement input	0.550	0.538
Sierra Credit Support Agreement | Weighted Average | Time Until Exit (years) | Simulation Analysis
Derivative [Line Items]
Measurement input	4.4	4.6
Sierra Credit Support Agreement | Weighted Average | Recovery Rate | Simulation Analysis
Derivative [Line Items]
Measurement input	0.350	0.350

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+ References

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-Section 50
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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