Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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The net result for the period of deducting operating expenses from operating revenues.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Business Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
Business Segment Information (Details) $ in Thousands	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) segment	Jun. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Dec. 24, 2014
Segment Reporting Information [Line Items]
Number of business segments \| segment			3
Net revenues	$ 33,342	$ 40,016	$ 77,899	$ 76,685
Operating income (Loss)	(602)	(1,234)	(8,137)	(7,962)
Identifiable assets	126,159		$ 126,159		$ 125,456
Product Concentration Risk \| Sales Revenue, Product Line \| Semiconductor
Segment Reporting Information [Line Items]
Concentration risk, percentage (less than)			25.00%
SoLayTec, B.V.
Segment Reporting Information [Line Items]
Percentage of voting interests acquired						51.00%
Operating Segments \| Solar
Segment Reporting Information [Line Items]
Net revenues	19,001	24,392	$ 38,346	42,141
Operating income (Loss)	(402)	1,232	(4,532)	(1,987)
Identifiable assets	50,580		50,580		45,717
Operating Segments \| Semiconductor
Segment Reporting Information [Line Items]
Net revenues	12,200	12,945	33,406	25,765
Operating income (Loss)	1,056	(1,113)	777	(483)
Identifiable assets	47,874		47,874		46,912
Operating Segments \| Polishing
Segment Reporting Information [Line Items]
Net revenues	2,141	2,679	6,147	8,779
Operating income (Loss)	343	574	899	1,917
Identifiable assets	5,274		5,274		5,793
Non-Segment
Segment Reporting Information [Line Items]
Operating income (Loss)	(1,599)	$ (1,927)	(5,281)	$ (7,409)
Identifiable assets	$ 22,431		$ 22,431		$ 27,034