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Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Sep. 30, 2019
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Accumulated Amortization | $ (17,809) | $ (15,769)
Intangible assets, Gross Carrying Amount | 30,394 | 29,995
Intangible assets, Net | $ 12,585 | $ 14,226
Customer Lists and Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Weighted Average Original Life (Years) | 8 years 10 months 24 days | 8 years 10 months 24 days
Definite-lived intangible assets, Gross Carrying Amount | $ 17,698 | $ 17,374
Definite-lived intangible assets, Accumulated Amortization | (11,847) | (10,661)
Definite-lived intangible assets, Net | $ 5,851 | $ 6,713
Developed Technology [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Weighted Average Original Life (Years) | 11 years 6 months | 11 years 6 months
Definite-lived intangible assets, Gross Carrying Amount | $ 9,565 | $ 9,490
Definite-lived intangible assets, Accumulated Amortization | (3,904) | (3,196)
Definite-lived intangible assets, Net | $ 5,661 | $ 6,294
Non-compete [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Weighted Average Original Life (Years) | 5 years | 5 years
Definite-lived intangible assets, Gross Carrying Amount | $ 230 | $ 230
Definite-lived intangible assets, Accumulated Amortization | $ (230) | (196)
Definite-lived intangible assets, Net |  | $ 34
Patents and Other [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Weighted Average Original Life (Years) | 16 years 6 months | 16 years 6 months
Definite-lived intangible assets, Gross Carrying Amount | $ 2,321 | $ 2,321
Definite-lived intangible assets, Accumulated Amortization | (1,828) | (1,716)
Definite-lived intangible assets, Net | 493 | 605
Definite-Lived Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | 29,814 | 29,415
Definite-lived intangible assets, Accumulated Amortization | (17,809) | (15,769)
Definite-lived intangible assets, Net | 12,005 | 13,646
Trademarks and Trade Names [Member] |  |
Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets, Net | $ 580 | $ 580

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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