XML 52 R31.htm IDEA: XBRL DOCUMENT
v3.25.4

Note 2 - Goodwill and Purchased Intangible Assets (Tables) | 12 Months Ended
--- | ---
Dec. 27, 2025
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  | Total Goodwill |
Balance December 30, 2023 |  | $ | 241,658 |
Impact of currency exchange |  |  | (7,019 | )
Balance December 28, 2024 |  |  | 234,639 |
Additions |  |  | 33,688 |
Impact of currency exchange |  |  | 14,700 |
Balance December 27, 2025 |  | $ | 283,027 |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table Text Block] |
|  | December 27, 2025 |  |  | December 28, 2024 |
|  |  |  |  |  |  |  |  |  | Remaining |  |  |  |  |  |  |  |  |
|  | Gross Carrying |  |  | Accumulated |  |  | Useful Life |  |  | Gross Carrying |  |  | Accumulated |
|  | Amount |  |  | Amortization |  |  | (years) |  |  | Amount |  |  | Amortization |
Developed technology |  | $ | 241,038 |  |  | $ | 199,776 |  |  | 3.5 |  |  | $ | 228,789 |  |  | $ | 163,453 |
Customer relationships |  |  | 75,677 |  |  |  | 44,210 |  |  | 5.3 |  |  |  | 72,570 |  |  |  | 35,229 |
Trade names |  |  | 22,366 |  |  |  | 15,845 |  |  | 4.6 |  |  |  | 20,926 |  |  |  | 12,930 |
Backlog |  |  | - |  |  |  | - |  |  | - |  |  |  | 100 |  |  |  | 100 |
Covenant not-to-compete |  |  | 225 |  |  |  | 203 |  |  | 1.0 |  |  |  | 223 |  |  |  | 179 |
|  | $ | 339,306 |  |  | $ | 260,034 |  |  |  |  |  | $ | 322,608 |  |  | $ | 211,891 |

X
- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite or indefinite life, by either major class or business segment. + References No definition available. + Details
Name: | cohu_ScheduleOfFinitelivedAndIndefinitelivedIntangibleAssetsTableTextBlock
Namespace Prefix: | cohu_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-2 + Details
Name: | us-gaap_ScheduleOfGoodwillTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration