v3.25.4
FAIR VALUE MEASUREMENTS - Quantitative information (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
$ / shares
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 578,649 $ 642,213
First lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments, fair value 429,573 502,693
Second lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments, fair value 4,839 8,342
Subordinated unsecured loans    
FAIR VALUE MEASUREMENTS    
Investments, fair value 1,286 1,175
Subordinated Notes    
FAIR VALUE MEASUREMENTS    
Investments, fair value 1,286 1,175
Subordinated Note to STRS JV    
FAIR VALUE MEASUREMENTS    
Investments, fair value 84,416 84,416
Level 3    
FAIR VALUE MEASUREMENTS    
Investments, fair value 557,047 619,472
Level 3 | First lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments, fair value 429,573 502,693
Level 3 | First lien secured loans | Market Quote    
FAIR VALUE MEASUREMENTS    
Investments, fair value   $ 9,453
Level 3 | First lien secured loans | Market Quote | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.968
Level 3 | First lien secured loans | Market Quote | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.968
Level 3 | First lien secured loans | Market Quote | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.968
Level 3 | First lien secured loans | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 358,708 $ 439,577
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.079 0.077
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.335 0.268
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 11.2 0.131
Level 3 | First lien secured loans | Option pricing model    
FAIR VALUE MEASUREMENTS    
Investments, fair value   $ 74
Level 3 | First lien secured loans | Option pricing model | Volatility | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.16
Level 3 | First lien secured loans | Option pricing model | Volatility | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.16
Level 3 | First lien secured loans | Option pricing model | Volatility | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.16
Level 3 | First lien secured loans | Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 51,846 $ 19,554
Level 3 | First lien secured loans | Recent transaction | Transaction price | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.968 0.98
Level 3 | First lien secured loans | Recent transaction | Transaction price | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.996 1
Level 3 | First lien secured loans | Recent transaction | Transaction price | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.983 98.5
Level 3 | First lien secured loans | Expected repayment    
FAIR VALUE MEASUREMENTS    
Investments, fair value   $ 9,104
Level 3 | First lien secured loans | Expected repayment | Transaction price | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   1.03
Level 3 | First lien secured loans | Expected repayment | Transaction price | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   1.03
Level 3 | First lien secured loans | Expected repayment | Transaction price | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   1.03
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 17,290 $ 22,923
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.055 0.058
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.082 0.08
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.074 0.069
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 1,729 $ 1,635
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.009 0.014
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.009 0.014
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.009 0.014
Level 3 | First lien secured loans | Collateral value    
FAIR VALUE MEASUREMENTS    
Investments, fair value   $ 373
Level 3 | First lien secured loans | Collateral value | Recovery Rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0
Level 3 | First lien secured loans | Collateral value | Recovery Rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.15
Level 3 | First lien secured loans | Collateral value | Recovery Rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.15
Level 3 | Second lien secured loans    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 4,839 $ 8,342
Level 3 | Second lien secured loans | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 3,404 $ 8,342
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.095 0.117
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.095 0.125
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.12
Level 3 | Second lien secured loans | Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 1,435  
Level 3 | Second lien secured loans | Recent transaction | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.095  
Level 3 | Second lien secured loans | Recent transaction | Transaction price | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.914  
Level 3 | Second lien secured loans | Recent transaction | Transaction price | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.914  
Level 3 | Second lien secured loans | Recent transaction | Transaction price | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.914  
Level 3 | Subordinated unsecured loans    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 1,286 $ 1,175
Level 3 | Subordinated unsecured loans | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 1,286  
Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.123
Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.129
Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input   0.126
Level 3 | Subordinated unsecured loans | Discounted cash flows | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.131  
Level 3 | Subordinated unsecured loans | Discounted cash flows | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.133  
Level 3 | Subordinated unsecured loans | Recent transaction | Discount rate | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.132  
Level 3 | Subordinated unsecured loans | Enterprise value analysis    
FAIR VALUE MEASUREMENTS    
Investments, fair value   $ 1,175
Level 3 | Subordinated Note to STRS JV    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 84,416 84,416
Level 3 | Subordinated Note to STRS JV | Recent transaction    
FAIR VALUE MEASUREMENTS    
Investments, fair value   84,416
Level 3 | Subordinated Note to STRS JV | Enterprise value analysis    
FAIR VALUE MEASUREMENTS    
Investments, fair value 84,416  
Level 3 | Preferred Equity | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 5,815  
Level 3 | Preferred Equity | Enterprise value analysis    
FAIR VALUE MEASUREMENTS    
Investments, fair value   $ 2,916
Level 3 | Preferred Equity | Enterprise value analysis | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.065 0.065
Level 3 | Preferred Equity | Enterprise value analysis | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.10 0.121
Level 3 | Preferred Equity | Enterprise value analysis | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.069 0.075
Level 3 | Common Equity | Discounted cash flows | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments, fair value   $ 10,728
Level 3 | Common Equity | Enterprise value analysis | EBITDA Multiple Range    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 21,572  
Level 3 | Common Equity | Enterprise value analysis | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.065 0.053
Level 3 | Common Equity | Enterprise value analysis | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.129 0.137
Level 3 | Common Equity | Enterprise value analysis | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.086 0.098
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 9,144 $ 9,132
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.009 0.014
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.023 0.02
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.023 0.02
Level 3 | Warrant | Discounted cash flows    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 197  
Level 3 | Warrant | Discounted cash flows | Discount rate | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.27  
Level 3 | Warrant | Discounted cash flows | Discount rate | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.27  
Level 3 | Warrant | Option pricing model | Volatility | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.27  
Level 3 | Warrant | Enterprise value analysis    
FAIR VALUE MEASUREMENTS    
Investments, fair value $ 205 $ 70
Level 3 | Warrant | Enterprise value analysis | EBITDA Multiple Range | Minimum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.074 0.055
Level 3 | Warrant | Enterprise value analysis | EBITDA Multiple Range | Maximum    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.074 0.055
Level 3 | Warrant | Enterprise value analysis | EBITDA Multiple Range | Weighted average    
FAIR VALUE MEASUREMENTS    
Investments Owned, Measurement Input 0.074 0.055