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v3.21.2

Operating Segments and Enterprise-Wide Information - Revenue by Segment, Recognition Type, and Geographic Area (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 26, 2021 | Jun. 27, 2020 | Jun. 26, 2021 | Jun. 27, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 188,076 | $ 157,824 | $ 374,712 | $ 318,577
Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 153,641 | 133,784 | 312,539 | 268,499
Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 34,435 | 24,040 | 62,173 | 50,078
Taiwan |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 51,884 | 33,171 | 55,262 | 29,201
Taiwan | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 46,737 | 29,806 | 53,427 | 27,941
Taiwan | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,147 | 3,365 | 1,835 | 1,260
South Korea |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 36,177 | 15,113 | 97,464 | 64,951
South Korea | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 35,426 | 14,249 | 91,471 | 60,245
South Korea | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 751 | 864 | 5,993 | 4,706
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 32,650 | 28,121 | 62,136 | 60,037
United States | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 24,174 | 22,368 | 45,482 | 47,979
United States | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 8,476 | 5,753 | 16,654 | 12,058
China |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 31,827 | 48,758 | 74,452 | 92,400
China | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 23,996 | 45,625 | 61,827 | 82,905
China | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,831 | 3,133 | 12,625 | 9,495
Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 14,288 | 6,500 | 17,025 | 18,429
Asia-Pacific | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,569 | 4,347 | 8,726 | 12,214
Asia-Pacific | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,719 | 2,153 | 8,299 | 6,215
Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,010 | 14,132 | 22,009 | 35,175
Europe | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 6,466 | 8,767 | 9,299 | 24,977
Europe | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,544 | 5,365 | 12,710 | 10,198
Japan |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,704 | 10,059 | 43,246 | 14,363
Japan | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,477 | 6,679 | 40,447 | 8,802
Japan | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,227 | 3,380 | 2,799 | 5,561
Rest of the world |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,536 | 1,970 | 3,118 | 4,021
Rest of the world | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 796 | 1,943 | 1,860 | 3,436
Rest of the world | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 740 | 27 | 1,258 | 585
Products transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 184,013 | 155,756 | 367,160 | 314,683
Products transferred at a point in time | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 153,129 | 133,208 | 311,605 | 267,277
Products transferred at a point in time | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 30,884 | 22,548 | 55,555 | 47,406
Products and services transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,063 | 2,068 | 7,552 | 3,894
Products and services transferred over time | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 512 | 576 | 934 | 1,222
Products and services transferred over time | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,551 | 1,492 | 6,618 | 2,672
Foundry & Logic |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 103,726 | 109,347 | 217,136 | 215,092
Foundry & Logic | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 103,726 | 109,347 | 217,136 | 215,092
Foundry & Logic | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
DRAM |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 42,088 | 19,052 | 75,986 | 43,748
DRAM | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 42,088 | 19,052 | 75,986 | 43,748
DRAM | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Flash |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,827 | 5,385 | 19,417 | 9,659
Flash | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,827 | 5,385 | 19,417 | 9,659
Flash | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 34,435 | 24,040 | 62,173 | 50,078
Systems | Probe Cards |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Systems | Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 34,435 | $ 24,040 | $ 62,173 | $ 50,078

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