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Debt - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 21, 2023 USD ($) | May 31, 2019 USD ($) | Apr. 30, 2019 USD ($) installment | Dec. 31, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | May 21, 2024 USD ($) | Nov. 08, 2023 USD ($) | Aug. 09, 2023 USD ($) | Aug. 08, 2023 USD ($) | May 21, 2023 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 24,005,000 | $ 16,663,000 |  |  |  |  |
Line of Credit |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of stock pledged on credit agreement |  |  |  |  | 66.67% |  |  |  |  |  |
Subordinated note | Director |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 3,510,000 | 0 |  |  |  |  |
Revolving credit agreement | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving line of credit, accumulated amortization of debt issuance costs |  |  |  |  | 461,000 | 78,000 |  |  |  |  |
Debt instrument, unamortized discount premium |  |  |  |  |  | 87,000 |  |  |  |  |
Long-term debt, gross |  |  |  |  | 20,142,000 | 16,289,000 |  |  |  |  |
Credit Agreement | Revolving credit agreement | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity | $ 19,000,000 |  |  |  | $ 26,000,000 | 30,000,000 |  |  | $ 23,000,000 | $ 28,000,000 |
Reserves under borrowing base |  |  |  |  |  |  | $ 1,500,000 | $ 1,500,000 |  | $ 1,500,000 |
Fixed charge coverage ratio |  |  |  |  |  |  |  |  |  | 1.1 |
Debt instrument, covenant combined commitment percentage |  |  |  |  |  |  |  |  |  | 10.00% |
Debt instrument, covenant combined borrowing base, percentage |  |  |  |  |  |  |  |  |  | 10.00% |
Debt instrument, covenant combined borrowing base, amount |  |  |  |  |  |  |  |  |  | $ 2,000,000 |
Commitment fee percentage |  |  |  |  | 0.50% |  |  |  |  |  |
Available funds |  |  |  |  | $ 2,055,000 | 2,830,000 |  |  |  |  |
Debt instrument, terminated amount |  |  |  |  | 0 |  |  |  |  |  |
Debt Instrument, collateral amount |  |  |  |  | 24,293,000 | 21,089,000 |  |  |  |  |
Letters of credit |  |  |  |  | $ 1,970,000 | $ 1,970,000 |  |  |  |  |
Weighted average interest rate, revolving credit facility |  |  |  |  | 8.10% | 7.70% |  |  |  |  |
Debt issuance costs incurred in period |  |  |  | $ 117,000 |  |  |  |  |  |  |
Revolving line of credit, accumulated amortization of debt issuance costs |  |  |  |  | $ 117,000 |  |  |  |  |  |
Credit Agreement | Revolving credit agreement | Line of Credit | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread |  |  |  |  | 2.75% | 2.25% |  |  |  |  |
Export Credit Facility | Revolving credit agreement | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  | 7,000,000 |  |
Debt instrument, terminated amount |  |  |  |  | $ 0 |  |  |  |  |  |
Fully earned and non-refundable fee |  |  |  |  | $ 6,000 |  |  |  |  |  |
Weighted average interest rate, revolving credit facility |  |  |  |  | 7.60% | 7.20% |  |  |  |  |
Export Credit Facility | Revolving credit agreement | Line of Credit | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread |  |  |  |  | 2.25% | 1.75% |  |  |  |  |
Export Credit Facility | Revolving credit agreement | Line of Credit | Export-Import Bank of the United States of America |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fully earned and non-refundable fee |  |  |  |  | $ 5,000 |  |  |  |  |  |
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity | 23,000,000 |  |  |  |  |  |  |  | 30,000,000 | $ 35,000,000 |
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period One |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  |  |  |  |  |  | 18,000,000 |  |  |  |
Debt covenant, maximum principal balance |  |  |  |  |  |  |  |  | 18,000,000 |  |
Reserves under borrowing base |  |  |  |  |  |  |  |  | 1,500,000 |  |
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period Two |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  |  |  |  |  |  | 19,000,000 |  |  |  |
Debt covenant, maximum principal balance |  |  |  |  |  |  |  |  | 19,000,000 |  |
Reserves under borrowing base |  |  |  |  |  |  |  |  | $ 2,000,000 |  |
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period Three |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  |  |  |  |  |  | 22,000,000 |  |  |  |
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period Four |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 0 |  |  |  |
Subordinated Promissory Note | Subordinated note | Director |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reserves under borrowing base | 1,500,000 |  |  |  |  |  |  |  |  |  |
Debt face amount | $ 3,000,000 |  |  |  |  |  |  |  |  |  |
Borrowing base calculation, percentage | 85.00% |  |  |  |  |  |  |  |  |  |
Borrowing base, percentage of eligible inventory | 70.00% |  |  |  |  |  |  |  |  |  |
Monthly increase in reserves under borrowing base | $ 250,000 |  |  |  |  |  |  |  |  |  |
Commitment fee percentage | 0.50% |  |  |  |  |  |  |  |  |  |
PIK interest amount |  |  |  |  | 360,000 |  |  |  |  |  |
Fully earned and non-refundable fee | $ 150,000 |  |  |  |  |  |  |  |  |  |
Available funds paid to borrowers | $ 3,000,000 |  |  |  |  |  |  |  |  |  |
Interest rate, fixed percentage | 14.00% |  |  |  |  |  |  |  |  |  |
Guaranty fee | $ 760,000 |  |  |  | 880,000 |  |  |  |  |  | $ 120,000
Subordinated Promissory Note | Subordinated note | Secured Overnight Financing Rate (SOFR) | Director |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread | 2.75% |  |  |  |  |  |  |  |  |  |
Subordinated Promissory Note | Subordinated note | CB Floating Rate | Director |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread | 0.25% |  |  |  |  |  |  |  |  |  |
ED Loan | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  | $ 864,000 |  |  |  |  |  |  |  |
Debt instrument, maturity term |  |  | 5 years |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | 133,000 | $ 194,000 |  |  |  |  |
Remaining of installments | installment |  |  | 3 |  |  |  |  |  |  |  |
ED Loan | Unsecured Debt | Debt Covenant Period One |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate, fixed percentage |  |  | 0.00% |  |  |  |  |  |  |  |
ED Loan | Unsecured Debt | Debt Covenant Period Two |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate, fixed percentage |  |  | 2.00% |  |  |  |  |  |  |  |
ED Loan | Unsecured Debt | Prime Rate |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread |  |  | 1.00% |  |  |  |  |  |  |  |
VPI Loan | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  | $ 180,000 |  |  |  |  |  |  |  |  |
Debt instrument, maturity term |  | 5 years |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 220,000 | $ 180,000 |  |  |  |  |
Interest rate |  | 3.56% |  |  |  |  |  |  |  |  |

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