Segment Information and Major Customers Net Property, Equipment and Improvements by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, equipment and improvements	$ 13,857	$ 8,354
North America, primarily United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, equipment and improvements	13,400	8,240
International, primarily Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, equipment and improvements	$ 457	$ 114