Segment Information (Tables)

6 Months Ended

Jun. 30, 2016

Segment Reporting [Abstract]

Summary of Revenue by Geographic Region

The following table summarizes revenue by geographic region:

	Three months ended June 30,				Six months ended June 30,
	2016		2015		2016		2015
	(in thousands)				(in thousands)
Germany	$	1,449	$	1,131	$	2,987	$	1,641
United States		694		998		1,806		2,521
Korea		642		1,261		1,064		1,986
Taiwan		425		1,211		808		2,913
Canada		190		72		423		518
Israel		120		291		291		614
China		1		1,813		3		5,163
Other		14		329		440		660
Total revenue	$	3,535	$	7,106	$	7,822	$	16,016

Summary of Revenue by Product Type

The following table summarizes revenue by product type:

	Three months ended June 30,				Six months ended June 30,
	2016		2015		2016		2015
	(in thousands)				(in thousands)
Core	$	689	$	4,029	$	1,158	$	9,138
Wafer		1,830		1,742		4,175		3,633
Optical		904		1,191		2,280		2,959
Research & development		112		144		209		286
Total revenue	$	3,535	$	7,106	$	7,822	$	16,016

Summary of Assets by Geographic Region

The following table summarizes assets by geographic region:

	June 30, 2016		December 31, 2015
	(in thousands)
United States	$	75,040	$	88,916
Malaysia		28,491		30,276
Other		48		50
Total assets	$	103,579	$	119,242