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Operating Segments and Enterprise-Wide Information - Revenue by Segment, Recognition Type, and Geographic Area (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 30, 2024 | Apr. 01, 2023
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 168,725 | $ 167,448
Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 136,701 | 127,328
Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 32,024 | 40,120
Taiwan |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 29,877 | 40,329
Taiwan | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 27,179 | 38,897
Taiwan | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,698 | 1,432
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 45,766 | 37,731
United States | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 35,596 | 24,641
United States | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 10,170 | 13,090
China |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 15,613 | 27,099
China | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 8,686 | 18,476
China | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 6,927 | 8,623
South Korea |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 50,717 | 20,775
South Korea | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 50,672 | 19,572
South Korea | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 45 | 1,203
Malaysia |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,863 | 11,270
Malaysia | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,608 | 10,324
Malaysia | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 255 | 946
Japan |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 8,542 | 10,977
Japan | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,347 | 7,136
Japan | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,195 | 3,841
Europe |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 8,849 | 9,426
Europe | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,528 | 3,426
Europe | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 5,321 | 6,000
Singapore |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,758 | 5,340
Singapore | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,516 | 3,200
Singapore | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,242 | 2,140
Rest of the world |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,740 | 4,501
Rest of the world | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,569 | 1,656
Rest of the world | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,171 | 2,845
Products transferred at a point in time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 164,425 | 163,388
Products transferred at a point in time | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 135,641 | 126,678
Products transferred at a point in time | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 28,784 | 36,710
Products and services transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,300 | 4,060
Products and services transferred over time | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,060 | 650
Products and services transferred over time | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,240 | 3,410
Foundry & Logic |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 86,768 | 101,562
Foundry & Logic | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 86,768 | 101,562
Foundry & Logic | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
DRAM |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 45,896 | 19,890
DRAM | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 45,896 | 19,890
DRAM | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Flash |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,037 | 5,876
Flash | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,037 | 5,876
Flash | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 32,024 | 40,120
Systems | Probe Cards |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Systems | Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 32,024 | $ 40,120

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