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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
Apr. 01, 2023
Mar. 26, 2022
Disaggregation of Revenue [Line Items]    
Revenues $ 167,448 $ 197,174
Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 127,328 159,983
Systems    
Disaggregation of Revenue [Line Items]    
Revenues 40,120 37,191
Taiwan    
Disaggregation of Revenue [Line Items]    
Revenues 40,329 53,069
Taiwan | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 38,897 42,522
Taiwan | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 1,432 10,547
United States    
Disaggregation of Revenue [Line Items]    
Revenues 37,731 25,647
United States | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 24,641 19,976
United States | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 13,090 5,671
China    
Disaggregation of Revenue [Line Items]    
Revenues 27,099 38,399
China | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 18,476 32,791
China | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 8,623 5,608
South Korea    
Disaggregation of Revenue [Line Items]    
Revenues 20,775 27,501
South Korea | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 19,572 24,881
South Korea | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 1,203 2,620
Malaysia    
Disaggregation of Revenue [Line Items]    
Revenues 11,270 22,199
Malaysia | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 10,324 21,517
Malaysia | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 946 682
Japan    
Disaggregation of Revenue [Line Items]    
Revenues 10,977 9,382
Japan | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 7,136 4,785
Japan | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 3,841 4,597
Europe    
Disaggregation of Revenue [Line Items]    
Revenues 9,426 8,395
Europe | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 3,426 2,382
Europe | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 6,000 6,013
Singapore    
Disaggregation of Revenue [Line Items]    
Revenues 5,340 10,896
Singapore | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 3,200 10,284
Singapore | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 2,140 612
Rest of the world    
Disaggregation of Revenue [Line Items]    
Revenues 4,501 1,686
Rest of the world | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 1,656 845
Rest of the world | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 2,845 841
Products transferred at a point in time    
Disaggregation of Revenue [Line Items]    
Revenues 163,388 194,252
Products transferred at a point in time | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 126,678 158,836
Products transferred at a point in time | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 36,710 35,416
Products and services transferred over time    
Disaggregation of Revenue [Line Items]    
Revenues 4,060 2,922
Products and services transferred over time | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 650 1,147
Products and services transferred over time | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 3,410 1,775
Foundry & Logic    
Disaggregation of Revenue [Line Items]    
Revenues 101,562 114,121
Foundry & Logic | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 101,562 114,121
Foundry & Logic | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
DRAM    
Disaggregation of Revenue [Line Items]    
Revenues 19,890 34,437
DRAM | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 19,890 34,437
DRAM | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Flash    
Disaggregation of Revenue [Line Items]    
Revenues 5,876 11,425
Flash | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 5,876 11,425
Flash | Systems    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Systems    
Disaggregation of Revenue [Line Items]    
Revenues 40,120 37,191
Systems | Probe Cards    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Systems | Systems    
Disaggregation of Revenue [Line Items]    
Revenues $ 40,120 $ 37,191