Segment Reporting and Enterprise-Wide Disclosures (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Revenue and Operating Income Information by Segment

Revenue and operating income information by segment was as follows (dollars in thousands):

Year Ended December 31, 2014	Systems			Probes			Corporate Unallocated			Total
Revenue	$	82,850		$	53,172		$	—		$	136,022
Gross profit	$	37,775		$	32,539		$	—		$	70,314
Gross margin		45.6	%		61.2	%		—			51.7	%
Income (loss) from operations	$	7,553		$	20,768		$	(15,037	)	$	13,284
Year Ended December 31, 2013
Revenue	$	79,229		$	40,781		$	—		$	120,010
Gross profit	$	33,177		$	21,547		$	—		$	54,724
Gross margin		41.9	%		52.8	%		—			45.6	%
Income (loss) from operations(1)	$	9,794		$	11,568		$	(14,029	)	$	7,333
Year Ended December 31, 2012
Revenue	$	74,368		$	38,595		$	—		$	112,963
Gross profit	$	29,391		$	20,560		$	—		$	49,951
Gross margin		39.5	%		53.3	%		—			44.2	%
Income (loss) from operations(1)	$	9,651		$	10,158		$	(12,252	)	$	7,557

(1) Amortization expense of $1.2 million and $0.7 million for the years ended December 31, 2013 and 2012, respectively, was reclassified from Corporate Unallocated to Systems to conform with the current year presentation.

Revenues by Geographic Area

Our revenues by geographic area were as follows (in thousands):

	Year Ended December 31,
	2014		2013		2012
United States	$	39,855	$	37,662	$	33,445
Asia Pacific		63,660		50,748		51,290
Europe		30,076		28,334		25,718
Other		2,431		3,266		2,510
	$	136,022	$	120,010	$	112,963

Long-Lived Assets, Exclusive of Deferred Income Taxes, by Geographic Area

Long-lived assets, exclusive of deferred income taxes, by geographic area were as follows (in thousands):

	December 31,
	2014		2013
United States	$	9,334	$	8,660
Asia Pacific		304		339
Europe		24,801		29,926
	$	34,439	$	38,925