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v3.25.3

Borrowings (Details) - USD ($) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 17, 2025 | Aug. 05, 2024 | May 02, 2024 | Feb. 21, 2024 | Dec. 15, 2022 | Dec. 16, 2021 | Nov. 16, 2021 | Nov. 09, 2021 | Dec. 31, 2018 | Mar. 10, 2018 | Dec. 12, 2016 | Mar. 26, 2013 | Mar. 18, 2013 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023 | Jan. 17, 2023 | Mar. 31, 2018
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset coverage percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 200.00% | 200.00% |  |  |
Asset coverage percentage with no approval |  |  |  |  |  |  |  |  |  |  |  |  |  | 200.00% |  |  |  |
Revolving credit facility in terms |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  |  |  | Dec. 15, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowed amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 23,200,000 |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 149,153,000 | $ 137,234,000 |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 55,418,666 | 76,471,498 | $ 36,441,941 |  |
Interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  |
Outstanding credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 90,000,000 | $ 78,100,000 |  |  |
Commitment fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  |  |  |
2023 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22,600,000 |
Accrued and unpaid interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |
Principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 3,500,000 | $ 60,000,000 |  |  |  |  |
Percentage of unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  | 6.125% |  |  |  |  |
Maturity date |  |  |  |  |  |  |  |  |  |  |  |  | Mar. 30, 2023 |  |  |  |  |
2028 Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 1,661,498 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of unsecured notes |  |  | 5.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured Notes [Member] | 2023 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of unsecured notes |  |  |  |  |  |  |  |  |  |  |  | 6.125% |  |  |  |  |  |
Principal amount of stock redeemed |  |  |  |  | $ 22,521,800 |  | $ 55,325,000 |  | $ 12,000,000 | $ 13,000,000 |  |  |  |  |  |  |  |
Realized loss on debt extinguishment |  |  |  |  |  | $ 300,000 |  |  | $ 300,000 |  |  |  |  |  |  |  |  |
Percentage of principal amount redeemed |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured Notes [Member] | 2028 Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 57,500,000 |  |  |  |  |  |  |  |  |  |
Percentage of unsecured notes |  |  |  |  |  |  |  | 5.25% |  |  |  |  |  |  |  |  |  |
Maturity date |  |  |  |  |  |  |  | Nov. 01, 2028 |  |  |  |  |  |  |  |  |  |
Asset Coverage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset coverage percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 207.80% | 216.80% |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Uncommitted accordion provision | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FBR Capital Markets & Co. [Member] | 2023 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  | $ 40,000,000 |  |  |  |  |  |  |
Number of shares sold (in Shares) |  |  |  |  |  |  |  |  |  |  | 1,573,872 |  |  |  |  |  |  |
Average price per note (in Dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 25.03 |  |  |  |  |  |  |
Net proceeds |  |  |  |  |  |  |  |  |  |  | $ 38,600,000 |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset coverage percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200.00%
Aggregate principal amount | $ 100,000,000 | $ 87,500,000 |  | $ 62,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] | ABR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] | SOFR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 2.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset coverage percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150.00%
Aggregate principal amount | $ 12,500,000 | $ 25,000,000 |  | $ 12,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] | ABR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 1.35% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] | SOFR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 2.35% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Underwriters [Member] | 2028 Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 7,500,000 |  |  |  |  |  |  |  |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Maximum month-end amount borrowed under the credit facility during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-14 + Details
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- Definition The cash inflow associated with the sale of a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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