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Operating Segments and Enterprise-Wide Information
 6 Months Ended
Jun. 26, 2021
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
June 26, 2021June 27, 2020
Probe CardsSystemsCorporate and OtherTotalProbe CardsSystemsCorporate and OtherTotal
Revenues$153,641 $34,435 $— $188,076 $133,784 $24,040 $— $157,824 
Gross profit $66,600 $16,907 $(7,224)$76,283 $61,523 $10,719 $(6,075)$66,167 
Gross margin43.3 %49.1 %40.6 %46.0 %44.6 %41.9 %
Six Months Ended
June 26, 2021June 27, 2020
Probe CardsSystemsCorporate and OtherTotalProbe CardsSystemsCorporate and OtherTotal
Revenues$312,539 $62,173 $— $374,712 $268,499 $50,078 $— $318,577 
Gross profit $136,915 $30,506 $(14,432)$152,989 $122,266 $24,053 $(12,762)$133,557 
Gross margin43.8 %49.1 %40.8 %45.5 %48.0 %41.9 %

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, inventory and fixed asset fair value adjustments due to acquisitions, share-based compensation, and other, 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
June 26, 2021June 27, 2020
Probe CardsSystemsTotalProbe CardsSystemsTotal
Market:
Foundry & Logic$103,726 $— $103,726 $109,347 $— $109,347 
DRAM42,088 — 42,088 19,052 — 19,052 
Flash7,827 — 7,827 5,385 — 5,385 
Systems— 34,435 34,435 — 24,040 24,040 
Total$153,641 $34,435 $188,076 $133,784 $24,040 $157,824 
Timing of revenue recognition:
Products transferred at a point in time$153,129 $30,884 $184,013 $133,208 $22,548 $155,756 
Products and services transferred over time512 3,551 4,063 576 1,492 2,068 
Total$153,641 $34,435 $188,076 $133,784 $24,040 $157,824 
Geographical region:
Taiwan$46,737 $5,147 $51,884 $29,806 $3,365 $33,171 
South Korea35,426 751 36,177 14,249 864 15,113 
United States24,174 8,476 32,650 22,368 5,753 28,121 
China23,996 7,831 31,827 45,625 3,133 48,758 
Asia-Pacific1
12,569 1,719 14,288 4,347 2,153 6,500 
Europe6,466 5,544 12,010 8,767 5,365 14,132 
Japan3,477 4,227 7,704 6,679 3,380 10,059 
Rest of the world796 740 1,536 1,943 27 1,970 
Total$153,641 $34,435 $188,076 $133,784 $24,040 $157,824 
Six Months Ended
June 26, 2021June 27, 2020
Probe CardsSystemsTotalProbe CardsSystemsTotal
Market:
Foundry & Logic$217,136 $— $217,136 $215,092 $— $215,092 
DRAM75,986 — 75,986 43,748 — 43,748 
Flash19,417 — 19,417 9,659 — 9,659 
Systems— 62,173 62,173 — 50,078 50,078 
Total$312,539 $62,173 $374,712 $268,499 $50,078 $318,577 
Timing of revenue recognition:
Products transferred at a point in time$311,605 $55,555 $367,160 $267,277 $47,406 $314,683 
Products and services transferred over time934 6,618 7,552 1,222 2,672 3,894 
Total$312,539 $62,173 $374,712 $268,499 $50,078 $318,577 
Geographical region:
Taiwan$91,471 $5,993 $97,464 $60,245 $4,706 $64,951 
China61,827 12,625 74,452 82,905 9,495 92,400 
United States45,482 16,654 62,136 47,979 12,058 60,037 
South Korea53,427 1,835 55,262 27,941 1,260 29,201 
Asia-Pacific1
40,447 2,799 43,246 8,802 5,561 14,363 
Europe9,299 12,710 22,009 24,977 10,198 35,175 
Japan8,726 8,299 17,025 12,214 6,215 18,429 
Rest of the world1,860 1,258 3,118 3,436 585 4,021 
Total$312,539 $62,173 $374,712 $268,499 $50,078 $318,577 

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