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Business Combinations - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | ---
Business Acquisition [Line Items] |  |
Goodwill | $ 34,058 | $ 34,407
A2iA |  |
Business Acquisition [Line Items] |  |
Current assets |  | 3,929
Property, plant, and equipment |  | 307
Intangible assets |  | 28,610
Goodwill |  | 24,991
Other non-current assets |  | 1,177
Current liabilities |  | (2,688)
Deferred income tax liabilities |  | (7,503)
Other non-current liabilities |  | (7)
Net assets acquired |  | 48,816
ICAR |  |
Business Acquisition [Line Items] |  |
Current assets |  | 2,036
Property, plant, and equipment |  | 83
Intangible assets |  | 6,407
Goodwill |  | 6,936
Other non-current assets |  | 87
Current liabilities |  | (1,652)
Deferred income tax liabilities |  | (1,602)
Other non-current liabilities |  | (828)
Net assets acquired |  | 11,467
Total |  |
Business Acquisition [Line Items] |  |
Current assets |  | 5,965
Property, plant, and equipment |  | 390
Intangible assets |  | 35,017
Goodwill |  | 31,927
Other non-current assets |  | 1,264
Current liabilities |  | (4,340)
Deferred income tax liabilities |  | (9,105)
Other non-current liabilities |  | (835)
Net assets acquired |  | $ 60,283

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