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Basis of Presentation - Deferred Profit (Details)
$ in Thousands
Dec. 31, 2015
USD ($)
systems
equipment
Sep. 30, 2015
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Number of similarly configured systems and processes | systems 2  
Number of similarly configured items of equipment | equipment 2  
Deferred revenues $ 6,994 $ 7,280
Deferred costs 2,315 2,407
Deferred profit $ 4,679 $ 4,873