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Segments and Geographic Information
 12 Months Ended
Dec. 28, 2024
Segment Reporting [Abstract]  
Segments and Geographic Information Segments and Geographic Information
We operate in two reportable segments consisting of the Probe Cards Segment and the Systems Segment.

Our chief operating decision maker (“CODM”) is our President and Chief Executive Officer, who assesses the reportable segments' performance by using each reportable segment's net contribution to make decisions about allocating resources and assessing performance for the entire company. The CODM uses net contribution for each reportable segment predominantly in the annual budget and forecasting process, as well as consideration of budget-to-actual variances on a quarterly basis when making decisions for assessment of our performance and results of operations. Certain components of net contribution are utilized to determine executive compensation along with other measures.

The following table provides net contribution by reportable segment and includes a reconciliation to income before income taxes (dollars in thousands):
Fiscal 2024
Probe CardsSystemsCorporate and OtherTotal
Revenues$625,960 $137,639 $— $763,599 
Cost of revenues366,953 78,128 10,595 455,676 
Gross profit259,007 59,511 (10,595)307,923 
Gross margin41.4 %43.2 %40.3 %
Research and development90,463 20,617 10,858 121,938 
Selling31,462 16,082 5,994 53,538 
Marketing8,775 7,184 5,120 21,079 
Net Contribution$128,307 $15,628 $(32,567)111,368 
General and administrative67,169 
Gain on sale of business20,581 
Operating income64,780 
Interest income14,111 
Interest expense(418)
Other income (expense), net939 
Income before income taxes$79,412 
Fiscal 2023
Probe CardsSystemsCorporate and OtherTotal
Revenues$497,903 $165,199 $— $663,102 
Cost of revenues312,511 80,464 11,547 404,522 
Gross profit185,392 84,735 (11,547)258,580 
Gross margin37.2 %51.3 %39.0 %
Research and development83,104 21,487 11,174 115,765 
Selling26,912 17,026 8,581 52,519 
Marketing5,983 9,367 7,273 22,623 
Net Contribution$69,393 $36,855 $(38,575)67,673 
General and administrative57,870 
Gain on sale of business72,953 
Operating income82,756 
Interest income7,217 
Interest expense(421)
Other income (expense), net(285)
Income before income taxes$89,267 
Fiscal 2022
Probe CardsSystemsCorporate and OtherTotal
Revenues$591,422 $156,515 $— $747,937 
Cost of revenues355,860 75,578 20,490 451,928 
Gross profit235,562 80,937 (20,490)296,009 
Gross margin39.8 %51.7 %39.6 %
Research and development82,428 17,078 9,716 109,222 
Selling29,583 14,953 13,612 58,148 
Marketing7,249 7,147 8,569 22,965 
Net Contribution$116,302 $41,759 $(52,387)105,674 
General and administrative50,762 
Operating income54,912 
Interest income2,220 
Interest expense(579)
Other income (expense), net1,317 
Income before income taxes$57,870 

Corporate and Other includes unallocated expenses relating to amortization of stock-based compensation expense, intangible assets, acquisition-related costs, including charges related to inventory and fixed assets stepped up to fair value, restructuring charges, and other costs, which are not used in evaluating the results of, or in allocating resources to, our reportable segments. Acquisition-related costs include transaction costs and any costs directly related to the acquisition and integration of acquired businesses.

Net Contribution represents Operating income excluding general and administrative expenses and gains on sale of business, which are not used in evaluating the results of, or in allocating resources to, our reportable segments.
The following table summarizes revenue, by geographic region, as a percentage of total revenues based upon ship-to location:
Fiscal Year Ended
December 28, 2024December 30, 2023December 31, 2022
South Korea24.2 %17.8 %14.9 %
United States24.1 25.9 17.1 
Taiwan22.7 22.3 22.7 
China13.5 13.8 21.5 
Europe4.6 5.9 5.2 
Japan4.4 5.5 5.1 
Singapore2.6 2.8 5.3 
Malaysia2.4 4.0 6.7 
Rest of World1.5 2.0 1.5 
Total revenues100.0 %100.0 %100.0 %

The following table summarizes revenue by market (in thousands):
 Fiscal Year Ended
 December 28, 2024December 30, 2023December 31, 2022
Foundry & Logic$381,182 $363,539 $409,196 
DRAM227,422 113,779 133,446 
Flash17,356 20,585 48,780 
Systems137,639 165,199 156,515 
Total revenues$763,599 $663,102 $747,937 

The following table summarizes revenue by timing of revenue recognition (in thousands):
Fiscal Year Ended
December 28, 2024December 30, 2023December 31, 2022
Probe CardsSystemsTotalProbe CardsSystemsTotalProbe CardsSystemsTotal
Products transferred at a point in time$620,598 $122,181 $742,779 $494,624 $155,145 $649,769 $587,738 $144,456 $732,194 
Services transferred over time5,362 15,458 20,820 3,279 10,054 13,333 3,684 12,059 15,743 
Total$625,960 $137,639 $763,599 $497,903 $165,199 $663,102 $591,422 $156,515 $747,937 

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 28, 2024December 30, 2023December 31, 2022
United States$411,646 $414,607 $406,529 
Europe21,323 23,204 42,640 
Asia-Pacific9,366 11,135 10,236 
Total$442,335 $448,946 $459,405