Summary of Significant Accounting Policies (Deferred Profit) (Details) $ in Thousands	Sep. 30, 2017 systems	Sep. 30, 2017 USD ($)	Sep. 30, 2017 equipment	Sep. 30, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of similarly configured systems and processes	2		2
Number of similarly configured items of equipment | equipment			2
Deferred revenue		$ 6,822		$ 7,029
Deferred costs		2,741		2,320
Deferred profit		$ 4,081		$ 4,709