Acquisition (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended
Dec. 24, 2014	Jan. 30, 2015
SoLayTec, B.V.
Business Acquisition [Line Items]
Percentage of voting interests acquired	51.00%
Purchase price consideration	$ 1.9
BTU International, Inc (BTU) Merger \| Merger Agreement
Business Acquisition [Line Items]
Shares issued upon conversion		3,185,852
Parent Company \| Merger Agreement
Business Acquisition [Line Items]
Exchange ratio		0.3291

Conversion Of Stock, Conversion Ratio, Shares Of Stock Exchanged Per Each Share Of Subsidiary Stock

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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-Publisher FASB

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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