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Goodwill and Intangible Assets - Amortization Expense Associated with Intangible Assets (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization expense of intangible assets | $ 1,048 | $ 1,448 | $ 4,046 | $ 4,453
Completed Technology |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization expense of intangible assets | 406 | 452 | 1,444 | 1,440
Customer Contracts [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization expense of intangible assets | 561 | 996 | 2,359 | 3,013
Trade Names [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization expense of intangible assets | 37 | 0 | 112 | 0
Noncompete Agreements [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization expense of intangible assets | $ 44 | $ 0 | $ 131 | $ 0

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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=121586364&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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- 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. + References No definition available. + Details
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