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Restructuring Charges - Restructuring Charges (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 25, 2022 | Jun. 25, 2022
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 581 | $ 894
Probe Cards |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 227 | 269
Systems |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 354 | 625
Cost of revenues |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 454 | 593
Cost of revenues | Probe Cards |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 227 | 266
Cost of revenues | Systems |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 227 | 327
Research and development |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 53 | 199
Research and development | Probe Cards |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 0
Research and development | Systems |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 53 | 199
Selling, general and administrative |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 74 | 102
Selling, general and administrative | Probe Cards |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 0 | 3
Selling, general and administrative | Systems |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 74 | $ 99

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