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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands | 6 Months Ended |
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Mar. 31, 2017 | Sep. 30, 2016
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Cost | $ 3,570 |
Accumulated Amortization | 1,207 |
Net | $ 2,363 | $ 2,783
Completed technologies |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Weighted Average Amortization Period (in years) | 6 years |
Cost | $ 2,370 |
Accumulated Amortization | 793 |
Net | $ 1,577 |
Customer relationships |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Weighted Average Amortization Period (in years) | 6 years |
Cost | $ 970 |
Accumulated Amortization | 324 |
Net | $ 646 |
Trade names |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Weighted Average Amortization Period (in years) | 5 years |
Cost | $ 230 |
Accumulated Amortization | 90 |
Net | $ 140 |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + 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/presentationRef -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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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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