Segments and Geographic Information (Tables)

12 Months Ended

Dec. 26, 2020

Segment Reporting [Abstract]

Operating Results by Reportable Segments

The following table summarizes the operating results by reportable segment (dollars in thousands):

	Fiscal 2020
	Probe Cards			Systems			Corporate and Other			Total
Revenues	$	581,739		$	111,877		$	—		$	693,616
Gross profit	$	263,215		$	51,835		$	(27,130)		$	287,920
Gross margin	45.2		%	46.3		%	—		%	41.5		%

	Fiscal 2019
	Probe Cards			Systems			Corporate and Other			Total
Revenues	$	491,363		$	98,101		$	—		$	589,464
Gross profit	$	211,382		$	50,927		$	(24,813)		$	237,496
Gross margin	43.0		%	51.9		%	—		%	40.3		%

	Fiscal 2018
	Probe Cards			Systems		Corporate and Other			Total
Revenues	$	434,269		$	95,406	$	—		$	529,675
Gross profit	$	187,320		$	47,074	$	(24,055)		$	210,339
Gross margin	43.1		%	49.3%		—		%	39.7		%

Summary of Revenue by Geographic Region

The following table summarizes revenue, by geographic region, as a percentage of total revenues based upon ship-to location:

	Fiscal Year Ended
	December 26, 2020		December 28, 2019		December 29, 2018
China	25.2	%	18.0	%	14.7	%
Taiwan	21.7		14.7		20.3
United States	18.4		26.3		25.2
South Korea	12.5		19.8		17.2
Europe	9.5		7.0		7.5
Japan	6.3		8.9		9.4
Asia-Pacific (1)	4.8		3.7		4.9
Rest of World	1.6		1.6		0.8
Total Revenues	100.0	%	100.0	%	100.0	%

(1)Asia-Pacific includes all countries in the region except Taiwan, South Korea, China, and Japan, which are disclosed separately.

Summary of Revenue by Market

The following table summarizes revenue by market (in thousands):

	Fiscal Year Ended
	December 26, 2020		December 28, 2019		December 29, 2018
Foundry & Logic	$	446,183	$	318,552	$	258,459
DRAM	109,734		147,257		135,333
Flash	25,822		25,554		40,477
Systems	111,877		98,101		95,406
Total revenues	$	693,616	$	589,464	$	529,675

Summary of Revenue by Timing of Recognition

The following table summarizes revenue by timing of revenue recognition (in thousands):

	Fiscal Year Ended
	December 26, 2020						December 28, 2019						December 29, 2018
	Probe Cards		Systems		Total		Probe Cards		Systems		Total		Probe Cards		Systems		Total
Products transferred at a point in time	$	579,569	$	104,858	$	684,427	$	488,925	$	93,837	$	582,762	$	432,033	$	91,514	$	523,547
Services transferred over time	2,170		7,019		9,189		2,438		4,264		6,702		2,236		3,892		6,128
Total	$	581,739	$	111,877	$	693,616	$	491,363	$	98,101	$	589,464	$	434,269	$	95,406	$	529,675

Long-lived Assets by Location

Long-lived assets, comprised of Operating lease, right-of-use-assets, Property, plant and equipment, net, Goodwill and Intangibles, net, reported based on the location of the asset was as follows (in thousands):

	December 26, 2020		December 28, 2019		December 29, 2018
United States	$	347,654	$	287,600	$	280,405
Europe	51,791		52,309		26,118
Asia-Pacific	7,322		7,064		4,385
Total	$	406,767	$	346,973	$	310,908