Goodwill and Other Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015
Intangible Assets
Amortization of customer relationships, patents, non-competes and other intangibles	$ 124	$ 144	$ 375	$ 385
Finite-Lived Intangible Assets, Gross	10,260		10,260		$ 10,260
Finite-lived intangible assets, Accumulated Amortization	(3,861)		(3,861)		(3,486)
Finite-lived intangible assets, Carrying Amount	6,399		6,399		6,774
Patents
Intangible Assets
Finite-Lived Intangible Assets, Gross	4,030		4,030		4,030
Finite-lived intangible assets, Accumulated Amortization	(3,300)		(3,300)		(3,091)
Finite-lived intangible assets, Carrying Amount	730		730		939
Customer relationships
Intangible Assets
Finite-Lived Intangible Assets, Gross	2,100		2,100		2,100
Finite-lived intangible assets, Accumulated Amortization	(236)		(236)		(119)
Finite-lived intangible assets, Carrying Amount	1,864		1,864		1,981
Other
Intangible Assets
Finite-Lived Intangible Assets, Gross	330		330		330
Finite-lived intangible assets, Accumulated Amortization	(325)		(325)		(276)
Finite-lived intangible assets, Carrying Amount	5		5		54
Trademarks
Intangible Assets
Finite-Lived Intangible Assets, Gross	3,800		3,800		3,800
Finite-lived intangible assets, Carrying Amount	$ 3,800		$ 3,800		$ 3,800