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Operating Segments and Enterprise-Wide Information
3 Months Ended
Mar. 28, 2020
Segment Reporting [Abstract]  
Operating Segments and Enterprise-Wide Information Operating Segments and Enterprise-Wide Information
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. 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 28, 2020March 30, 2019
Probe CardsSystemsCorporate and OtherTotalProbe CardsSystemsCorporate and OtherTotal
Revenues$134,715  $26,038  $—  $160,753  $108,103  $24,110  $—  $132,213  
Gross profit $60,743  $13,334  $(6,687) $67,390  $45,294  $13,016  $(5,789) $52,521  
Gross margin45.1 %51.2 %— %41.9 %41.9 %54.0 %— %39.7 %

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, and restructuring charges, net, 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 28, 2020March 30, 2019
Probe CardsSystemsTotalProbe CardsSystemsTotal
Market:
Foundry & Logic$105,745  $—  $105,745  $71,580  $—  $71,580  
DRAM24,696  —  24,696  28,886  —  28,886  
Flash4,274  —  4,274  7,637  —  7,637  
Systems—  26,038  26,038  —  24,110  24,110  
Total$134,715  $26,038  $160,753  $108,103  $24,110  $132,213  
Timing of revenue recognition:
Products transferred at a point in time$134,069  $24,858  $158,927  $107,491  $23,142  $130,633  
Services transferred over time646  1,180  1,826  612  968  1,580  
Total$134,715  $26,038  $160,753  $108,103  $24,110  $132,213  
Geographical region:
China$37,280  $6,362  $43,642  $18,151  $3,692  $21,843  
United States25,611  6,305  31,916  27,655  6,608  34,263  
Taiwan30,439  1,341  31,780  21,257  1,130  22,387  
Europe16,210  4,833  21,043  5,373  4,120  9,493  
South Korea13,692  396  14,088  25,018  1,705  26,723  
Japan5,535  2,835  8,370  5,300  5,132  10,432  
Asia-Pacific1
4,455  3,408  7,863  2,790  473  3,263  
Rest of the world1,493  558  2,051  2,559  1,250  3,809  
Total$134,715  $26,038  $160,753  $108,103  $24,110  $132,213  
1 Asia-Pacific includes all countries in the region except China, Japan, South Korea, and Taiwan, which are disclosed separately.