Summary of Significant Accounting Policies (Intangibles) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Jan. 30, 2015	Dec. 24, 2014
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ 1,200	$ 700	$ 600
Amortization in fiscal year 2016	$ 800	800
Amortization in fiscal year 2017	700	700
Amortization in fiscal year 2018	600	600
Amortization in fiscal year 2019	600	600
Amortization in fiscal year 2019	600	600
Gross Carrying Amount	7,528	7,528	6,112
Accumulated Amortization	(2,589)	(2,589)	(3,434)
Net Carrying Amount	4,939	4,939	2,678
Non-compete agreements
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	137	137	1,055
Accumulated Amortization	(137)	(137)	(955)
Net Carrying Amount	0	$ 0	100
Non-compete agreements | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		4 years
Non-compete agreements | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		8 years
Customer lists
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		10 years
Gross Carrying Amount	2,434	$ 2,434	817
Accumulated Amortization	(808)	(808)	(592)
Net Carrying Amount	1,626	$ 1,626	225
Customer lists | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		6 years
Technology
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,223	$ 3,223	2,319
Accumulated Amortization	(1,368)	(1,368)	(1,682)
Net Carrying Amount	1,855	$ 1,855	637
Technology | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		5 years
Technology | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		10 years
In-process research and development
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		5 years
Gross Carrying Amount	0	$ 0	1,600
Accumulated Amortization	0	0	(27)
Net Carrying Amount	0	0	1,573
Trade names
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,456	1,456	0
Accumulated Amortization	(72)	(72)	0
Net Carrying Amount	1,384	$ 1,384	0
Trade names | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		10 years
Trade names | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		15 years
Other
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	278	$ 278	321
Accumulated Amortization	(204)	(204)	(178)
Net Carrying Amount	74	$ 74	$ 143
Other | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		2 years
Other | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life (in years)		10 years
SoLayTec, B.V.
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Percentage of voting interests acquired						51.00%
Finite-lived intangibles acquired						$ 2,000
Finite-lived intangibles adjustment	200
SoLayTec, B.V. | Technology
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangibles acquired						1,800
SoLayTec, B.V. | Trade names
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangibles acquired						$ 200
BTU International, Inc (BTU)
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangibles acquired					$ 2,900
Finite-lived intangibles adjustment	1,700
BTU International, Inc (BTU) | Customer lists
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangibles acquired					1,700
BTU International, Inc (BTU) | Trade names
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangibles acquired					$ 1,200
Kingstone
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Intangible assets derecognized	3,200
Accumulated amortization derecognized	$ 1,900