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Acquisition of Tech Blend - Additional Information (Detail) - USD ($) | 1 Months Ended | 8 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2018
Maximum [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets, amortization period |  |  | 25 years
Minimum [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets, amortization period |  |  | 12 years
Tech Blend [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Acquisition date | 2017-11 |  |
Purchase price paid in cash | $ 65,000,000 |  |
Revenues |  | $ 19,000,000 |
Intangible assets | 29,000,000 |  |
Tech Blend [Member] | Developed Technologies [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets | $ 21,000,000 |  |
Intangible assets, amortization period | 25 years |  |
Tech Blend [Member] | Customer Relationships [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets | $ 8,000,000 |  |
Intangible assets, amortization period | 12 years |  |
Tech Blend [Member] | Maximum [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Acquisition costs |  | $ 1,000,000 |

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