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GOODWILL AND INTANGIBLE ASSETS - CHANGES IN BALANCE OF GOODWILL (Details)
$ in Thousands
12 Months Ended
Sep. 30, 2018
USD ($)
Goodwill [Roll Forward]  
Balance at September 30, 2017 $ 3,014
Foreign currency effect on goodwill (410)
Balance at September 30, 2018 34,407
ICAR  
Goodwill [Roll Forward]  
Acquisitions 6,936
Balance at September 30, 2018 6,936
A2iA  
Goodwill [Roll Forward]  
Acquisitions 24,867
Balance at September 30, 2018 $ 24,867