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Supplemental Balance Sheet Information - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2022 | Sep. 30, 2021 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Balance Sheet Related Disclosures [Abstract] |  |  |  |  |
CARES Act employee retention credit, benefit to operating costs and expenses |  | $ 3,600 |  |  |
CARES Act employee retention credit receivable | $ 3,577 | $ 3,577 |  | $ 3,577 |
Amortization expense | $ 1,100 |  | $ 600 | $ 2,300 | $ 1,300

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- Definition Benefit (contra expense) recorded to reduce operating costs and expenses associated with the employee retention credit under the provisions of the Coronavirus Aid, Relief and Economic Security Act (the "CARES Act") enacted in March 2020. + References No definition available. + Details
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Balance Type: | credit
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- Definition Receivable for anticipated reimbursement of personnel expenses associated with the employee retention credit under the provisions of the Coronavirus Aid, Relief and Economic Security Act (the "CARES Act") enacted in March 2020. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- References No definition available. + Details
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