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Business Combination - Schedule of Intangible Assets Acquired (Details) - USD ($) $ in Thousands |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 23, 2018 | Oct. 16, 2017 | Jun. 30, 2018 | Sep. 30, 2017
Customer relationships |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Amortization Period |  |  | 4 years 9 months 18 days | 6 years
A2iA Group II, S.A.S. |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Intangible assets acquired | $ 28,610 |  |  |
A2iA Group II, S.A.S. | Completed technologies |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Amortization Period | 7 years |  |  |
Intangible assets acquired | $ 13,015 |  |  |
A2iA Group II, S.A.S. | Customer relationships |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Amortization Period | 5 years |  |  |
Intangible assets acquired | $ 15,360 |  |  |
A2iA Group II, S.A.S. | Trade names |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Amortization Period | 5 years |  |  |
Intangible assets acquired | $ 235 |  |  |
ICAR Vision Systems, S.L. |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Intangible assets acquired |  | $ 6,407 |  |
ICAR Vision Systems, S.L. | Completed technologies |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Amortization Period |  | 5 years |  |
Intangible assets acquired |  | $ 4,956 |  |
ICAR Vision Systems, S.L. | Customer relationships |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Amortization Period |  | 2 years |  |
Intangible assets acquired |  | $ 1,298 |  |
ICAR Vision Systems, S.L. | Trade names |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Amortization Period |  | 3 years |  |
Intangible assets acquired |  | $ 153 |  |

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