Long-Term Debt and Lines of Credit - Schedule of long-term debt, net of current portion (Details) - USD ($) $ in Thousands  | 
Mar. 31, 2025  | 
Sep. 30, 2024  | 
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| Debt Instrument [Line Items] | ||
| Less current portion | $ (1,410) | $ (1,410) | 
| Long-term debt, net | 81,654 | 82,313 | 
| Met Fixed-Rate Term Loans | ||
| Debt Instrument [Line Items] | ||
| Long-term debt, net of current portion: | 70,000 | 70,000 | 
| Pru Loans A & B | ||
| Debt Instrument [Line Items] | ||
| Long-term debt, net of current portion: | 9,877 | 10,457 | 
| Met Citree Term Loan | ||
| Debt Instrument [Line Items] | ||
| Long-term debt, net of current portion: | 3,575 | 3,700 | 
| Term Loans and PRU Loans | ||
| Debt Instrument [Line Items] | ||
| Deferred financing fees | (388) | (434) | 
| Long-term debt | 83,064 | 83,723 | 
| Less current portion | (1,410) | (1,410) | 
| Long-term debt, net | $ 81,654 | $ 82,313 | 
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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