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Operating Segments and Enterprise-Wide Information (Tables) | 6 Months Ended
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Jun. 26, 2021
Segment Reporting [Abstract] |
Schedule of Operating Results by Segment | The following table summarizes the operating results by reportable segment (dollars in thousands):
| Three Months Ended
| June 26, 2021 |  | June 27, 2020
| Probe Cards |  | Systems |  | Corporate and Other |  | Total |  | Probe Cards |  | Systems |  | Corporate and Other |  | Total
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 margin | 43.3 | % |  | 49.1 | % |  |  |  | 40.6 | % |  | 46.0 | % |  | 44.6 | % |  |  |  | 41.9 | %
| Six Months Ended
| June 26, 2021 |  | June 27, 2020
| Probe Cards |  | Systems |  | Corporate and Other |  | Total |  | Probe Cards |  | Systems |  | Corporate and Other |  | Total
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 margin | 43.8 | % |  | 49.1 | % |  |  |  | 40.8 | % |  | 45.5 | % |  | 48.0 | % |  |  |  | 41.9 | %
Disaggregation of Revenue by Segment | Certain revenue category information by reportable segment was as follows (in thousands):
| Three Months Ended
| June 26, 2021 |  | June 27, 2020
| Probe Cards |  | Systems |  | Total |  | Probe Cards |  | Systems |  | Total
Market: |  |  |  |  |  |  |  |  |  |  |
Foundry & Logic | $ | 103,726 |  |  | $ | — |  |  | $ | 103,726 |  |  | $ | 109,347 |  |  | $ | — |  |  | $ | 109,347 |
DRAM | 42,088 |  |  | — |  |  | 42,088 |  |  | 19,052 |  |  | — |  |  | 19,052 |
Flash | 7,827 |  |  | — |  |  | 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 time | 512 |  |  | 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 Korea | 35,426 |  |  | 751 |  |  | 36,177 |  |  | 14,249 |  |  | 864 |  |  | 15,113 |
United States | 24,174 |  |  | 8,476 |  |  | 32,650 |  |  | 22,368 |  |  | 5,753 |  |  | 28,121 |
China | 23,996 |  |  | 7,831 |  |  | 31,827 |  |  | 45,625 |  |  | 3,133 |  |  | 48,758 |
Asia-Pacific 1 | 12,569 |  |  | 1,719 |  |  | 14,288 |  |  | 4,347 |  |  | 2,153 |  |  | 6,500 |
Europe | 6,466 |  |  | 5,544 |  |  | 12,010 |  |  | 8,767 |  |  | 5,365 |  |  | 14,132 |
Japan | 3,477 |  |  | 4,227 |  |  | 7,704 |  |  | 6,679 |  |  | 3,380 |  |  | 10,059 |
Rest of the world | 796 |  |  | 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, 2021 |  | June 27, 2020
| Probe Cards |  | Systems |  | Total |  | Probe Cards |  | Systems |  | Total
Market: |  |  |  |  |  |  |  |  |  |  |
Foundry & Logic | $ | 217,136 |  |  | $ | — |  |  | $ | 217,136 |  |  | $ | 215,092 |  |  | $ | — |  |  | $ | 215,092 |
DRAM | 75,986 |  |  | — |  |  | 75,986 |  |  | 43,748 |  |  | — |  |  | 43,748 |
Flash | 19,417 |  |  | — |  |  | 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 time | 934 |  |  | 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 |
China | 61,827 |  |  | 12,625 |  |  | 74,452 |  |  | 82,905 |  |  | 9,495 |  |  | 92,400 |
United States | 45,482 |  |  | 16,654 |  |  | 62,136 |  |  | 47,979 |  |  | 12,058 |  |  | 60,037 |
South Korea | 53,427 |  |  | 1,835 |  |  | 55,262 |  |  | 27,941 |  |  | 1,260 |  |  | 29,201 |
Asia-Pacific 1 | 40,447 |  |  | 2,799 |  |  | 43,246 |  |  | 8,802 |  |  | 5,561 |  |  | 14,363 |
Europe | 9,299 |  |  | 12,710 |  |  | 22,009 |  |  | 24,977 |  |  | 10,198 |  |  | 35,175 |
Japan | 8,726 |  |  | 8,299 |  |  | 17,025 |  |  | 12,214 |  |  | 6,215 |  |  | 18,429 |
Rest of the world | 1,860 |  |  | 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.

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