Long-Term Debt and Lines of Credit - Schedule of Long-term Debt, Net of Current Portion (Details) - USD ($) $ in Thousands  | 
Jun. 30, 2022  | 
Sep. 30, 2021  | 
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| Debt Instrument [Line Items] | ||
| Less current portion | $ 3,035 | $ 4,285 | 
| Deferred Financing Costs, Net | 781 | 986 | 
| Met Fixed-Rate Term Loans | ||
| Debt Instrument [Line Items] | ||
| Principal | 70,000 | 70,000 | 
| Deferred Financing Costs, Net | 456 | 524 | 
| Met Variable-Rate Term Loans | ||
| Debt Instrument [Line Items] | ||
| Principal | 20,313 | 38,094 | 
| Deferred Financing Costs, Net | 120 | 241 | 
| Met Citree Term Loan | ||
| Debt Instrument [Line Items] | ||
| Principal | 4,075 | 4,263 | 
| Deferred Financing Costs, Net | 28 | 31 | 
| Pru Loans A & B | ||
| Debt Instrument [Line Items] | ||
| Principal | 13,067 | 13,937 | 
| Deferred Financing Costs, Net | 177 | 190 | 
| Term Loans and PRU Loans | ||
| Debt Instrument [Line Items] | ||
| Principal | 107,455 | 126,294 | 
| Less current portion | 3,035 | 4,285 | 
| Long-term debt | 104,420 | 122,009 | 
| Deferred Financing Costs, Net | $ 781 | $ 986 | 
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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. No definition available. 
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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, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount, excluding 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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