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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 18, 2021 | Sep. 30, 2023 USD ($) investment | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) investment | Sep. 30, 2022 USD ($) | Mar. 31, 2023 USD ($) investment
Accounting Policies [Abstract] |  |  |  |  |  |
FDIC Insured amount |  | $ 7,100,000 |  | $ 7,100,000 |  | $ 8,900,000
FDIC uninsured amount |  | $ 21,700,000 |  | $ 21,700,000 |  | $ 20,300,000
Concentration Risk [Line Items] |  |  |  |  |  |
Non-cash interest income percent |  | 3.40% | 3.60% | 3.20% | 3.70% |
Number of PIK investments | investment |  | 4 |  | 4 |  | 3
Non-cash PIK interest income percent |  | 3.60% | 5.20% | 3.80% | 4.20% |
Interest or penalties expense |  | $ 0 | $ 0 | $ 0 | $ 0 |
Restricted Stock | 2010 Plan |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Right to grant period | 10 years |  |  |  |  |
Percentage of Total Portfolio at Fair Value | Credit risk | Investment Owned, Non-accrual Status |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Percent of total investment portfolio's fair value |  |  |  | 2.00% |  | 0.30%
Percentage of Total Portfolio at Cost | Credit risk | Investment Owned, Non-accrual Status |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Percent of total investment portfolio's fair value |  |  |  | 2.90% |  | 1.30%

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