XML 58 R51.htm IDEA: XBRL DOCUMENT
v3.25.2

Goodwill and Purchased Intangible Assets (Additional Information) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2025 | Jun. 29, 2024 | Jun. 28, 2025 | Jun. 29, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |
DisposedOfFullyAmortiziedIdentifiableIntangibleAssetsGrossCarryingValue | $ 117,000 | $ 0 | $ 117,000 | $ 0

X
- Definition DisposedOfFullyAmortiziedIdentifiableIntangibleAssetsGrossCarryingValue + References No definition available. + Details
Name: | onto_DisposedOfFullyAmortiziedIdentifiableIntangibleAssetsGrossCarryingValue
Namespace Prefix: | onto_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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