Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Summary of Revenue by Geographic Region

The following table summarizes revenue by geographic region:

	Three months ended March 31,
	2016		2015
	(in thousands)
Germany	$	1,538	$	510
United States		1,111		1,523
Korea		422		725
Australia		412		215
Taiwan		383		1,701
China		2		3,351
Other		419		885
Revenue	$	4,287	$	8,910

Summary of Revenue by Product Type

The following table summarizes revenue by product type:

	Three months ended March 31,
	2016		2015
	(in thousands)
Core	$	441	$	5,109
Wafer		2,345		1,891
Optical		1,404		1,769
Research & Development		97		141
Revenue	$	4,287	$	8,910

Summary of Assets by Geographic Region

The following table summarizes assets by geographic region:

	March 31, 2016		December 31, 2015
	(in thousands)
United States	$	82,145	$	88,916
Malaysia		29,146		30,276
Other		46		50
Total Assets	$	111,337	$	119,242