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Segment Information and Major Customers Net Property, Equipment and Improvements by Segment (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, equipment and improvements $ 6,270 $ 12,801
North America, primarily United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, equipment and improvements 6,156 12,648
International, primarily Europe    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, equipment and improvements $ 114 $ 153