Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Warranty) (Details)

v3.5.0.2
Summary of Significant Accounting Policies (Warranty) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Accrued Warranty [Roll Forward]      
Beginning balance $ 793 $ 628 $ 1,454
Warranty – BTU merger 0 806 0
Additions for warranties issued during the period 1,074 677 479
Reductions in the liability for payments made under the warranty (832) (1,007) (390)
Changes related to pre-existing warranties (250) (215) (750)
Currency translation adjustment 10 (96) (165)
Ending balance $ 795 $ 793 $ 628
Minimum      
Product Warranty [Line Items]      
Standard product warranty, period 12 months    
Maximum      
Product Warranty [Line Items]      
Standard product warranty, period 24 months