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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

X

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 45
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=109237686&loc=d3e17752-110868

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-URI https://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b)(1))
-URI https://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

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- Definition

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+ References

No definition available.

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