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Segment Information (Detail) - Long-lived assets by geographic location - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 1,460 $ 1,086
North America [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets 1,457 1,078
Europe [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 3 $ 8