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FAIR VALUE MEASUREMENTS - Quantitative information (Details)
$ in Thousands
Sep. 30, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
FAIR VALUE MEASUREMENTS    
Investments $ 764,554 $ 819,208
Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.150  
First lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments $ 615,945 697,232
Second lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments 20,383 23,650
Subordinated Notes    
FAIR VALUE MEASUREMENTS    
Investments 167 167
Level 3    
FAIR VALUE MEASUREMENTS    
Investments $ 742,488 803,601
Level 3 | Discounted cash flows and Enterprise value | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.093  
Level 3 | First lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments $ 615,945 697,232
Level 3 | First lien secured loans | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments $ 406,569 $ 358,921
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.075 0.045
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.199 0.218
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.124 0.098
Level 3 | First lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.055
Level 3 | First lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.150
Level 3 | First lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.083
Level 3 | First lien secured loans | Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments $ 37,014  
Level 3 | First lien secured loans | Recent transaction | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments   $ 209,892
Level 3 | First lien secured loans | Recent transaction | Transaction price | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.820 0.945
Level 3 | First lien secured loans | Recent transaction | Transaction price | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.991 0.991
Level 3 | First lien secured loans | Recent transaction | Transaction price | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input (0.918) 0.979
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments $ 111,055 $ 113,808
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.076 0.072
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.135 0.103
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.126 0.086
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Transaction price | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.924 0.975
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Transaction price | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 1.000 0.988
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Transaction price | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input (0.979) 0.984
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Exit EBITDA Multiple    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.095
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Exit EBITDA Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.070
Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Exit EBITDA Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.110
Level 3 | First lien secured loans | Guideline public companies    
FAIR VALUE MEASUREMENTS    
Investments   $ 7,542
Level 3 | First lien secured loans | Guideline public companies | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.051
Level 3 | First lien secured loans | Discounted cash flows and Market quote    
FAIR VALUE MEASUREMENTS    
Investments $ 30,790  
Level 3 | First lien secured loans | Discounted cash flows and Market quote | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.105  
Level 3 | First lien secured loans | Discounted cash flows and Market quote | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.118  
Level 3 | First lien secured loans | Discounted cash flows and Market quote | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.114  
Level 3 | First lien secured loans | Discounted cash flows and Market quote | Market Quote    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 1.000  
Level 3 | First lien secured loans | Discounted cash flows and Market quote | Market Quote | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.852  
Level 3 | First lien secured loans | Discounted cash flows and Market quote | Market Quote | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.951  
Level 3 | First lien secured loans | Discounted cash flows and Market quote | Market Quote | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input (0.907)  
Level 3 | First lien secured loans | Expected repayment    
FAIR VALUE MEASUREMENTS    
Investments $ 30,517 $ 7,069
Level 3 | Second lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments 20,383 23,650
Level 3 | Second lien secured loans | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments $ 3,274 $ 18,725
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.174  
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.115
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.223
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.142
Level 3 | Second lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.065
Level 3 | Second lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.085
Level 3 | Second lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.080
Level 3 | Second lien secured loans | Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments   $ 4,925
Level 3 | Second lien secured loans | Recent transaction | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.985
Level 3 | Second lien secured loans | Discounted cash flows and Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments $ 4,912  
Level 3 | Second lien secured loans | Discounted cash flows and Recent transaction | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.122  
Level 3 | Second lien secured loans | Discounted cash flows and Recent transaction | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.986  
Level 3 | Second lien secured loans | Discounted cash flows and Market quote    
FAIR VALUE MEASUREMENTS    
Investments $ 12,197  
Level 3 | Second lien secured loans | Discounted cash flows and Market quote | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.182  
Level 3 | Second lien secured loans | Discounted cash flows and Market quote | Market Quote    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.778  
Level 3 | Subordinated Notes    
FAIR VALUE MEASUREMENTS    
Investments $ 80,167 $ 60,167
Level 3 | Subordinated Notes | Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments   $ 167
Level 3 | Subordinated Notes | Recent transaction | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   1.000
Level 3 | Subordinated Notes | Enterprise value    
FAIR VALUE MEASUREMENTS    
Investments 80,000 $ 60,000
Level 3 | Subordinated Notes | Discounted cash flows and Enterprise value    
FAIR VALUE MEASUREMENTS    
Investments $ 167  
Level 3 | Subordinated Notes | Discounted cash flows and Enterprise value | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.041  
Level 3 | Preferred Equity    
FAIR VALUE MEASUREMENTS    
Investments $ 3,886 2,811
Level 3 | Preferred Equity | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments $ 2,217  
Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.243  
Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.255  
Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.244  
Level 3 | Preferred Equity | Discounted cash flows | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.090  
Level 3 | Preferred Equity | Recent transaction | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments   $ 1,007
Level 3 | Preferred Equity | Recent transaction | Transaction price | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares   1.00
Level 3 | Preferred Equity | Recent transaction | Transaction price | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares   56.30
Level 3 | Preferred Equity | Recent transaction | Transaction price | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares   47.13
Level 3 | Preferred Equity | Recent transaction | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.150
Level 3 | Preferred Equity | Similar Transaction    
FAIR VALUE MEASUREMENTS    
Investments   $ 1,018
Level 3 | Preferred Equity | Similar Transaction | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.097
Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies    
FAIR VALUE MEASUREMENTS    
Investments   $ 786
Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.173
Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | Exit EBITDA Multiple    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.110
Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.079
Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | NFY EBITDA Multiple    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.075
Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.100
Level 3 | Preferred Equity | Enterprise value    
FAIR VALUE MEASUREMENTS    
Investments $ 853  
Level 3 | Preferred Equity | Enterprise value | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.117  
Level 3 | Preferred Equity | Discounted cash flows and Enterprise value    
FAIR VALUE MEASUREMENTS    
Investments $ 816  
Level 3 | Preferred Equity | Discounted cash flows and Enterprise value | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.170  
Level 3 | Preferred Equity | Discounted cash flows and Enterprise value | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.036  
Level 3 | Preferred Equity | Discounted cash flows and Enterprise value | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.085  
Level 3 | Preferred Equity | Discounted cash flows and Enterprise value | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.061  
Level 3 | Preferred Equity | Discounted cash flows and Enterprise value | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.150  
Level 3 | Common Equity    
FAIR VALUE MEASUREMENTS    
Investments $ 15,852 $ 15,280
Level 3 | Common Equity | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments $ 1,614 $ 3,602
Level 3 | Common Equity | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.193 0.130
Level 3 | Common Equity | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.213 0.227
Level 3 | Common Equity | Discounted cash flows | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.211 0.150
Level 3 | Common Equity | Discounted cash flows | Exit EBITDA Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.086
Level 3 | Common Equity | Discounted cash flows | Exit EBITDA Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.100
Level 3 | Common Equity | Discounted cash flows | Exit EBITDA Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.096
Level 3 | Common Equity | Discounted cash flows | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.075  
Level 3 | Common Equity | Discounted cash flows | Discount for lack of marketability | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.100
Level 3 | Common Equity | Discounted cash flows | Discount for lack of marketability | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.150
Level 3 | Common Equity | Discounted cash flows | Discount for lack of marketability | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.103
Level 3 | Common Equity | Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments $ 400  
Level 3 | Common Equity | Recent transaction | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments   $ 1,502
Investments Owned, Measurement Input | $ / shares 1.00  
Level 3 | Common Equity | Recent transaction | Transaction price | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares   1.00
Level 3 | Common Equity | Recent transaction | Transaction price | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares   1,000.00
Level 3 | Common Equity | Recent transaction | Transaction price | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares   289.95
Level 3 | Common Equity | Recent transaction | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.150  
Level 3 | Common Equity | Similar Transaction | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments   $ 2,052
Level 3 | Common Equity | Similar Transaction | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.060
Level 3 | Common Equity | Similar Transaction | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.134
Level 3 | Common Equity | Similar Transaction | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.105
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment    
FAIR VALUE MEASUREMENTS    
Investments   $ 8,124
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.140
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.190
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.182
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares   1.00
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Exit EBITDA Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.080
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Exit EBITDA Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.110
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Exit EBITDA Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.105
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | NFY EBITDA Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.086
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | NFY EBITDA Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.108
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | NFY EBITDA Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.089
Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.100
Level 3 | Common Equity | Enterprise value    
FAIR VALUE MEASUREMENTS    
Investments $ 361  
Level 3 | Common Equity | Enterprise value | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.133  
Level 3 | Common Equity | Enterprise value | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.171  
Level 3 | Common Equity | Enterprise value | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.100  
Level 3 | Common Equity | Discounted cash flows and Enterprise value    
FAIR VALUE MEASUREMENTS    
Investments $ 9,523  
Level 3 | Common Equity | Discounted cash flows and Enterprise value | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.120  
Level 3 | Common Equity | Discounted cash flows and Enterprise value | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.194  
Level 3 | Common Equity | Discounted cash flows and Enterprise value | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.181  
Level 3 | Common Equity | Discounted cash flows and Enterprise value | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.048  
Level 3 | Common Equity | Discounted cash flows and Enterprise value | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.121  
Level 3 | Common Equity | Collateral value and Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments $ 219  
Level 3 | Common Equity | Collateral value and Recent transaction | Transaction price    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares 1.30  
Level 3 | Common Equity | Collateral value and Recent transaction | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.080  
Level 3 | Common Equity | Collateral value and Recent transaction | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.150  
Level 3 | Common Equity | Collateral value    
FAIR VALUE MEASUREMENTS    
Investments $ 2,471  
Level 3 | Common Equity | Collateral value | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.060  
Level 3 | Common Equity | Collateral value | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.100  
Level 3 | Common Equity | Collateral value | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.080  
Level 3 | Common Equity | Recent transaction and Enterprise Value    
FAIR VALUE MEASUREMENTS    
Investments $ 1,264  
Level 3 | Common Equity | Recent transaction and Enterprise Value | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares 10.0  
Level 3 | Common Equity | Recent transaction and Enterprise Value | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares 1,000.0  
Level 3 | Common Equity | Recent transaction and Enterprise Value | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input | $ / shares 482.4  
Level 3 | Common Equity | Recent transaction and Enterprise Value | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.050  
Level 3 | Common Equity | Recent transaction and Enterprise Value | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.123  
Level 3 | Common Equity | Recent transaction and Enterprise Value | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.088  
Level 3 | Warrant    
FAIR VALUE MEASUREMENTS    
Investments $ 6,255 $ 4,461
Level 3 | Warrant | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments $ 2,432  
Level 3 | Warrant | Discounted cash flows | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.005  
Level 3 | Warrant | Discounted cash flows | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.003  
Level 3 | Warrant | Discounted cash flows | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.004  
Level 3 | Warrant | Discounted cash flows | Volatility    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.000  
Level 3 | Warrant | Enterprise value | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.152  
Level 3 | Warrant | Discounted cash flows and Option-pricing method    
FAIR VALUE MEASUREMENTS    
Investments $ 3,823 $ 4,461
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount rate    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.193  
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.227
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.295
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.292
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Exit EBITDA Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.055
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Exit EBITDA Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.086
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Exit EBITDA Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.059
Level 3 | Warrant | Discounted cash flows and Option-pricing method | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.102  
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount for lack of marketability    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.150 0.150
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Volatility | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.035
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Volatility | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.087
Level 3 | Warrant | Discounted cash flows and Option-pricing method | Volatility | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.036