XML 84 R77.htm IDEA: XBRL DOCUMENT
v3.25.2

Disclosure - Restructuring (Additional Information) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2025 | Jun. 29, 2024 | Jun. 28, 2025 | Jun. 29, 2024
Restructuring Charges [Abstract] |  |  |  |
Restructuring cost in cost of goods sold | $ (16,191) | $ (703) | $ (19,826) | $ (1,491)
RestructuringCost | (22,415) | (1,324) | (27,173) | (2,370)
Restructuring costs in operating expenses | $ (6,224) | $ (621) | $ (7,347) | $ (879)

X
- Definition Restructuring cost recored to cost of goods sold for inventory write-downs. + References No definition available. + Details
Name: | onto_RestructuringCostInCostOfGoodsSold
Namespace Prefix: | onto_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Restructuring cost recorded in operating expense for employee severance + References No definition available. + Details
Name: | onto_RestructuringCostInOperatingExpenses
Namespace Prefix: | onto_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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