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v3.23.3

Summary of Significant Accounting Policies and Supplemental Balance Sheet Information - Additional Information (Detail) - USD ($) shares in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Nov. 06, 2015 | Nov. 05, 2014
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Available-for-sale debt securities | $ 3,933,000 | $ 0 |  |  |
Held-to-maturity debt securities | 0 | 0 |  |  |
Realized gains or losses on sales of available-for-sale securities | 0 | 0 | $ 0 |  |
Inventories, net of reserves | 1,800,000 | 1,100,000 |  |  |
CARES Act employee retention credit receivable | 3,441,000 | 3,441,000 |  |  |
Depreciation expense | 4,700,000 | 4,700,000 | 4,900,000 |  |
Amortization expense | 3,800,000 | 4,400,000 | 3,100,000 |  |
Impairment loss | 0 | 0 | 0 |  |
Goodwill impairment charges | 0 | 0 | 0 |  |
Impairment charges relating to long-lived assets | $ 0 | $ 0 | $ 0 |  |
Antidilutive options excluded from computation of EPS | 0.1 | 0.1 | 0.1 |  |
ASC Topic 842 adoption, lease liability | $ 3,846,000 |  |  |  |
Remaining amount available for repurchases of shares | 25,300,000 |  |  |  |
Accelerated Share Repurchase Program [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Maximum payments for repurchase of common stock |  |  |  | $ 20,000,000 | $ 30,000,000
Abbott Agreement [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Collaborative arrangement payment received | 87,800,000 |  |  |  |
Remaining contingent milestone payments | $ 0 |  |  |  |
Abbott Agreement [Member] | TRANSCEND Clinical Trial [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Clinical study completion period | 2 years |  |  |  |
Revenue [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Performance obligations, payment terms, royalties | 45 days |  |  |  |
Minimum [Member] | Revenue [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Performance obligations, payment terms, product sales | 30 days |  |  |  |
Performance obligations, payment terms, R&D services | 30 days |  |  |  |
Maximum [Member] | Revenue [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Performance obligations, payment terms, product sales | 45 days |  |  |  |
Performance obligations, payment terms, R&D services | 45 days |  |  |  |
Leases [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Lease description | The Company leases facilities for research, office, manufacturing and warehousing. |  |  |  |
Lease, existence of option to extend | true |  |  |  |
Lease, option to extend | The Company’s leases include one or more options to renew and extend the lease term at the Company’s discretion. These renewal options are not included in right-of-use assets and lease liabilities as they are not reasonably certain of exercise. |  |  |  |
Operating lease cost | $ 1,400,000 | $ 1,100,000 | $ 800,000 |  |
Weighted average remaining lease term for operating leases | 4 years 4 months 24 days |  |  |  |
Weighted average discount rate used to determine operating lease liabilities | 3.90% |  |  |  |

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