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Operating Segments and Enterprise-Wide Information
 3 Months Ended
Mar. 30, 2024
Segment Reporting [Abstract]  
Operating Segments and Enterprise-Wide Information Operating Segments and Enterprise-Wide Information
Our CODM is our Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the entire company. We operate in two reportable segments consisting of the Probe Cards segment and the Systems segment. The following table summarizes the operating results by reportable segment (dollars in thousands):
Three Months Ended
March 30, 2024April 1, 2023
Probe CardsSystemsCorporate and OtherTotalProbe CardsSystemsCorporate and OtherTotal
Revenues$136,701 $32,024 $— $168,725 $127,328 $40,120 $— $167,448 
Gross profit 50,791 14,506 (2,559)62,738 43,623 20,746 (3,291)61,078 
Gross margin37.2 %45.3 %37.2 %34.3 %51.7 %36.5 %
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 compensation along with other measures.

Corporate and Other includes unallocated expenses relating to amortization of intangible assets, inventory and fixed asset fair value adjustments due to acquisitions, share-based compensation, and restructuring charges which are not used in evaluating the results of, or in allocating resources to, our reportable segments.

Certain revenue category information by reportable segment was as follows (in thousands):
Three Months Ended
March 30, 2024April 1, 2023
Probe CardsSystemsTotalProbe CardsSystemsTotal
Market:
Foundry & Logic$86,768 $— $86,768 $101,562 $— $101,562 
DRAM45,896 — 45,896 19,890 — 19,890 
Flash4,037 — 4,037 5,876 — 5,876 
Systems— 32,024 32,024 — 40,120 40,120 
Total$136,701 $32,024 $168,725 $127,328 $40,120 $167,448 
Timing of revenue recognition:
Products transferred at a point in time$135,641 $28,784 $164,425 $126,678 $36,710 $163,388 
Products and services transferred over time1,060 3,240 4,300 650 3,410 4,060 
Total$136,701 $32,024 $168,725 $127,328 $40,120 $167,448 
Geographical region:
South Korea$50,672 $45 $50,717 $19,572 $1,203 $20,775 
United States35,596 10,170 45,766 24,641 13,090 37,731 
Taiwan27,179 2,698 29,877 38,897 1,432 40,329 
China8,686 6,927 15,613 18,476 8,623 27,099 
Europe3,528 5,321 8,849 3,426 6,000 9,426 
Japan4,347 4,195 8,542 7,136 3,841 10,977 
Singapore3,516 1,242 4,758 3,200 2,140 5,340 
Malaysia1,608 255 1,863 10,324 946 11,270 
Rest of the world1,569 1,171 2,740 1,656 2,845 4,501 
Total$136,701 $32,024 $168,725 $127,328 $40,120 $167,448