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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 18, 2011 | Sep. 30, 2022 USD ($) investment | Sep. 30, 2021 USD ($) investment | Sep. 30, 2022 USD ($) investment | Sep. 30, 2021 USD ($) investment | Mar. 31, 2022 USD ($)
Accounting Policies [Abstract] |  |  |  |  |  |
FDIC uninsured amount |  | $ 29,000,000 |  | $ 29,000,000 |  | $ 10,200,000
Concentration Risk [Line Items] |  |  |  |  |  |
Non-cash interest income percent |  | 3.60% | 3.60% | 3.70% | 3.70% |
Number of PIK investments | investment |  | 2 | 2 | 2 | 2 |
Non-cash PIK interest income percent |  | 5.20% | 4.30% | 4.20% | 4.80% |
Remaining lease term |  | 10 years |  | 10 years |  |
Interest or penalties expense |  | $ 0 | $ 0 | $ 0 | $ 0 |
Right to grant period | 10 years |  |  |  |  |
Qualifying assets |  | 87.10% |  | 87.10% |  |
Percentage of Total Portfolio at Fair Value | Credit Concentration Risk | Investment Owned, Non-accrual Status |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Percentage of Total Portfolio |  |  |  | 0.90% |  | 1.50%
Percentage of Total Portfolio |  |  |  | 0.90% |  | 1.50%
Percentage of Total Portfolio at Cost | Credit Concentration Risk | Investment Owned, Non-accrual Status |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Percentage of Total Portfolio |  |  |  | 2.30% |  | 2.60%
Percentage of Total Portfolio |  |  |  | 2.30% |  | 2.60%

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