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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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		6 Months Ended
Business Segment Information (Details) $ in Thousands	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($) segment	Mar. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Dec. 24, 2014
Segment Reporting Information [Line Items]
Number of business segments \| segment			3
Net Revenues	$ 22,483	$ 24,273	$ 44,557	$ 36,669
Operating income (Loss)	(3,607)	(1,936)	(7,535)	(6,728)
Identifiable Assets	122,728		$ 122,728		$ 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	9,801	9,463	$ 19,344	17,749
Operating income (Loss)	(2,266)	(724)	(4,130)	(3,219)
Identifiable Assets	46,778		46,778		45,717
Operating Segments \| Semiconductor
Segment Reporting Information [Line Items]
Net Revenues	10,507	12,088	21,206	12,820
Operating income (Loss)	(119)	730	(279)	630
Identifiable Assets	46,640		46,640		46,912
Operating Segments \| Polishing
Segment Reporting Information [Line Items]
Net Revenues	2,175	2,722	4,007	6,100
Operating income (Loss)	386	601	555	1,343
Identifiable Assets	5,714		5,714		5,793
Non-Segment
Segment Reporting Information [Line Items]
Operating income (Loss)	(1,608)	$ (2,543)	(3,681)	$ (5,482)
Non-Segment \| Non-segment
Segment Reporting Information [Line Items]
Identifiable Assets	$ 23,596		$ 23,596		$ 27,034