Goodwill and Other Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Intangible Assets
Amortization expense of patents, non-competes and other intangibles	$ 126	$ 104
Finite-Lived Intangible Assets, Gross	10,260		$ 10,260
Finite-lived intangible assets, Accumulated Amortization	(3,612)		(3,486)
Finite-lived intangible assets, Carrying Amount	6,648		6,774
Patents
Intangible Assets
Finite-Lived Intangible Assets, Gross	4,030		4,030
Finite-lived intangible assets, Accumulated Amortization	(3,162)		(3,091)
Finite-lived intangible assets, Carrying Amount	868		939
Customer relationships
Intangible Assets
Finite-Lived Intangible Assets, Gross	2,100		2,100
Finite-lived intangible assets, Accumulated Amortization	(159)		(119)
Finite-lived intangible assets, Carrying Amount	1,941		1,981
Other
Intangible Assets
Finite-Lived Intangible Assets, Gross	330		330
Finite-lived intangible assets, Accumulated Amortization	(291)		(276)
Finite-lived intangible assets, Carrying Amount	39		54
Trademarks
Intangible Assets
Finite-Lived Intangible Assets, Gross	3,800		3,800
Finite-lived intangible assets, Carrying Amount	$ 3,800		$ 3,800