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Segment Information (Detail) - Long-lived assets by geographic location - USD ($)
$ in Thousands
Sep. 30, 2017
Sep. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 1,675 $ 1,967
North America [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets 1,078 1,348
Europe [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 597 $ 619