Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands		12 Months Ended
	Jan. 07, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Intangible Assets
Impairment charges recognized		$ 0	$ 0
Goodwill		4,789
Amortization expense of patents, non-competes and other intangibles		511	416	$ 416
Total intangible assets, Gross Amount			8,660
Finite-lived intangible assets, Gross Amount		10,260
Finite-lived intangible assets, Accumulated Amortization		(3,486)	(3,475)
Finite-lived intangible assets, Carrying Amount		6,774
Carrying Amount		6,774	5,185
Leveltek Processing, LLC
Intangible Assets
Acquisition price	$ 14,600
Goodwill	4,789
Customer relationships	2,100
Patents
Intangible Assets
Finite-lived intangible assets, Gross Amount		4,030	4,030
Finite-lived intangible assets, Accumulated Amortization		(3,091)	(2,813)
Finite-lived intangible assets, Carrying Amount		$ 939	1,217
Patents | Minimum
Intangible Assets
Useful life		2 years
Patents | Maximum
Intangible Assets
Useful life		16 years
Noncompete Agreements
Intangible Assets
Finite-lived intangible assets, Gross Amount			500
Finite-lived intangible assets, Accumulated Amortization			(452)
Finite-lived intangible assets, Carrying Amount			48
Other Intangible Assets
Intangible Assets
Finite-lived intangible assets, Gross Amount		$ 330	330
Finite-lived intangible assets, Accumulated Amortization		(276)	(210)
Finite-lived intangible assets, Carrying Amount		$ 54	120
Customer relationships
Intangible Assets
Useful life		16 years
Finite-lived intangible assets, Gross Amount		$ 2,100
Finite-lived intangible assets, Accumulated Amortization		(119)
Finite-lived intangible assets, Carrying Amount		1,981
Customer relationships | Leveltek Processing, LLC
Intangible Assets
Customer relationships	$ 2,100
Trademarks
Intangible Assets
Indefinite-lived intangible assets		$ 3,800	$ 3,800