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Segments and Geographic Information
 12 Months Ended
Dec. 25, 2021
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 Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the entire company.


The following table summarizes the operating results by reportable segment (dollars in thousands):
Fiscal 2021
Probe CardsSystemsCorporate and OtherTotal
Revenues$633,281 $136,393 $— $769,674 
Gross profit279,873 65,834 (22,940)322,767 
Gross margin44.2 %48.3 %— %41.9 %
Fiscal 2020
Probe CardsSystemsCorporate and OtherTotal
Revenues$581,739 $111,877 $— $693,616 
Gross profit263,215 51,835 (27,130)287,920 
Gross margin45.2 %46.3 %— %41.5 %
Fiscal 2019
Probe CardsSystemsCorporate and OtherTotal
Revenues$491,363 $98,101 $— $589,464 
Gross profit211,382 50,927 (24,813)237,496 
Gross margin43.0 %51.9 %— %40.3 %

Operating results provide useful information to our management for assessment of our performance and results of operations. Certain components of our operating results are utilized to determine executive compensation along with other measures.

Corporate and Other includes unallocated expenses relating to amortization of intangible assets, share-based compensation expense, acquisition-related costs, including charges related to inventory and fixed assets stepped up to fair value, 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.
The following table summarizes revenue, by geographic region, as a percentage of total revenues based upon ship-to location:
Fiscal Year Ended
December 25, 2021December 26, 2020December 28, 2019
Taiwan24.2 %21.7 %14.7 %
China21.2 25.2 18.0 
South Korea16.0 12.5 19.8 
United States15.9 18.4 26.3 
Asia-Pacific (1)
11.5 4.8 3.7 
Europe5.7 9.5 7.0 
Japan4.7 6.3 8.9 
Rest of World0.8 1.6 1.6 
Total Revenues100.0 %100.0 %100.0 %

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

The following table summarizes revenue by market (in thousands):
 Fiscal Year Ended
 December 25, 2021December 26, 2020December 28, 2019
Foundry & Logic$435,812 $446,183 $318,552 
DRAM156,049 109,734 147,257 
Flash41,420 25,822 25,554 
Systems136,393 111,877 98,101 
Total revenues$769,674 $693,616 $589,464 

The following table summarizes revenue by timing of revenue recognition (in thousands):
Fiscal Year Ended
December 25,
2021		December 26,
2020		December 28,
2019
Probe CardsSystemsTotalProbe CardsSystemsTotalProbe CardsSystemsTotal
Products transferred at a point in time$630,038 $124,788 $754,826 $579,569 $104,858 $684,427 $488,925 $93,837 $582,762 
Services transferred over time3,243 11,605 14,848 2,170 7,019 9,189 2,438 4,264 6,702 
Total$633,281 $136,393 $769,674 $581,739 $111,877 $693,616 $491,363 $98,101 $589,464 

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 25, 2021December 26, 2020December 28, 2019
United States$372,338 $347,654 $287,600 
Europe47,700 51,791 52,309 
Asia-Pacific10,368 7,322 7,064 
Total$430,406 $406,767 $346,973