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Summary of Significant Accounting Policies (Deferred Profit) (Details) $ in Thousands | Sep. 30, 2017 systems | Sep. 30, 2017 USD ($) | Sep. 30, 2017 equipment | Sep. 30, 2016 USD ($)
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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

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