SUPPLEMENTAL BALANCE SHEET INFORMATION - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Sep. 30, 2025 |
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| Loss Contingencies [Line Items] | ||
| Advances to suppliers | $ 11,380 | $ 19,396 |
| Prepaid research models | 5,022 | 3,502 |
| Tax-related receivables | 1,372 | 2,263 |
| Note receivable | 6,667 | 0 |
| Insurance recovery receivable | 5,302 | 16,961 |
| Other | 7,642 | 6,768 |
| Prepaid expenses and other current assets | 37,385 | 48,890 |
| Securities Class Action Lawsuit | ||
| Loss Contingencies [Line Items] | ||
| Insurance recovery receivable | 0 | 11,000 |
| 2025 Cybersecurity Incident | ||
| Loss Contingencies [Line Items] | ||
| Insurance recovery receivable | $ 4,618 | $ 4,033 |
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- Definition Information related to prepaid research models. No definition available.
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- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable classified as current. Excludes net investment in lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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/disclosureRef
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- Definition Amount of receivable related to a loss contingency accrual that is expected to be collected within one year or the normal operating cycle, if longer. For example, an insurance recovery receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of current assets classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of consideration paid in advance for supplies that provide economic benefits within a future period of one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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