DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details) |
12 Months Ended | ||||
|---|---|---|---|---|---|
|
Sep. 30, 2025
USD ($)
distribution
|
Sep. 30, 2024
USD ($)
|
Sep. 30, 2023
USD ($)
|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Equity [Abstract] | |||||
| Number of monthly distributions | distribution | 3 | ||||
| Investment company, cash distributions paid to common stockholders from ordinary income | 83.10% | 100.00% | |||
| Investment company, cash distributions paid to common stockholders from capital gains | 16.90% | ||||
| Cash distributions to common stockholders | $ 55,500,000 | $ 43,100,000 | |||
| Undistributed ordinary income | 5,481,000 | 6,590,000 | $ 5,000,000.0 | ||
| Tax return of capital distribution | $ 700,000 | $ 0 | $ 0 | ||