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Leases - Schedule of Financial Statement Classification of Lease Balances Within Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Sep. 30, 2025
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Leases [Abstract] |  |
Right-of-use assets - operating | $ 16,318 | $ 18,293
Right-of-use assets - finance | $ 207 | $ 247
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Property, plant and equipment - net | Property, plant and equipment - net
Total right-of-use assets | $ 16,525 | $ 18,540
Operating lease liabilities | 2,032 | 1,903
Finance lease liabilities | 130 | 126
Total current portion of long-term lease liabilities | 2,162 | 2,029
Operating lease liabilities | 15,621 | 17,316
Finance lease liabilities | 108 | 168
Total long-term lease liabilities | 15,729 | 17,484
Total lease liabilities | $ 17,891 | $ 19,513

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