Business Combinations - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Goodwill	$ 33,925	$ 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