Acquisitions (Details) $ in Thousands	Jan. 30, 2015 USD ($) shares	Dec. 24, 2014 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 10,974	$ 10,535
SoLayTec, B.V.
Business Acquisition [Line Items]
Percentage of voting interests acquired		51.00%
Total purchase price consideration		$ 1,900
Goodwill		3,200
Identifiable intangible assets		$ 2,000
Parent Company | Merger Agreement
Business Acquisition [Line Items]
Conversion ratio, shares of stock exchanged per each share of subsidiary stock	0.3291
BTU International, Inc (BTU) Merger | Merger Agreement
Business Acquisition [Line Items]
Goodwill	$ 5,100
Identifiable intangible assets	$ 2,900
Conversion of stock, shares issued | shares	3,185,852