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Segment Information and Major Customers Net Property, Equipment and Improvements by Segment (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Sep. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, equipment and improvements $ 12,801 $ 14,041
North America, primarily United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, equipment and improvements 12,648 13,861
International, primarily Europe    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, equipment and improvements $ 153 $ 180