Summary of Significant Accounting Policies (Warranty) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Accrued Warranty [Roll Forward]
Beginning balance	$ 795	$ 793
Additions for warranties issued during the period	1,723	1,074
Reductions in the liability for payments made under the warranty	(414)	(832)
Changes related to pre-existing warranties	(872)	(250)
Currency translation adjustment	22	10
Ending balance	$ 1,254	$ 795
Minimum
Product Warranty [Line Items]
Standard product warranty, period	12 years
Maximum
Product Warranty [Line Items]
Standard product warranty, period	24 years