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BORROWINGS - Schedule of Line of Credit Facilities (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Sep. 30, 2022 | May 13, 2022 | May 12, 2022
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit outstanding, at cost |  | $ 152,600,000 |  | $ 152,600,000 |  | $ 141,800,000 |  |
Availability | [1],[2],[3],[4],[5] |  |  |  |  | 4,000,000 |  |
Credit Facility | Revolving Line of Credit | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Commitment amount |  | 245,000,000 |  | 245,000,000 |  | 225,000,000 | $ 175,000,000 | $ 205,000,000
Line of credit outstanding, at cost |  | 152,600,000 |  | 152,600,000 |  | 141,800,000 |  |
Availability |  | 71,046,000 |  | 71,046,000 |  | $ 60,068,000 |  |
Weighted average borrowings outstanding, at cost |  | $ 125,756,000 | $ 42,491,000 | $ 127,427,000 | $ 37,677,000 |  |  |
Weighted average interest rate |  | 8.00% | 5.90% | 7.50% | 6.60% |  |  |
Commitment (unused) fees incurred |  | $ 185,000 | $ 344,000 | $ 341,000 | $ 679,000 |  |  |
[1] | Unless indicated otherwise, all of our investments are valued using Level 3 inputs within the ASC 820 fair value hierarchy. Refer to Note 3—Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[2] | Certain of the securities listed in this schedule are issued by affiliate(s) of the indicated portfolio company. The majority of the securities listed, totaling $577.6 million at fair value, are pledged as collateral under our revolving line of credit, as described further in Note 5—Borrowings in the accompanying Notes to Consolidated Financial Statements. Under the Investment Company Act of 1940, as amended (the “1940 Act”), we may not acquire any non-qualifying assets unless, at the time such acquisition is made, qualifying assets represent at least 70% of our total assets. As of September 30, 2022, our investments in Leeds Novamark Capital I, L.P. (“Leeds”) and Funko Acquisition Holdings, LLC (“Funko”) are considered non-qualifying assets under Section 55 of the 1940 Act. Such non-qualifying assets represent 1.0% of total investments, at fair value, as of September 30, 2022.
[3] | Category percentages represent the fair value of each category and subcategory as a percentage of net assets as of September 30, 2022.
[4] | Fair value was based on an internal yield analysis or on estimates of value submitted by ICE Data Pricing and Reference Data, LLC (“ICE”).
[5] | Unless indicated otherwise, all cash interest rates are indexed to 30-day London Interbank Offered Rate (“LIBOR” or “L”), which was 3.14% as of September 30, 2022. If applicable, paid-in-kind (“PIK”) interest rates are noted separately from the cash interest rate. Certain securities are subject to an interest rate floor. The cash interest rate is the greater of the floor or LIBOR plus a spread. Due dates represent the contractual maturity date.

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