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v3.25.1

Deferred Income for Government Grants - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2024
Disclosure Of Property Plant And Equipment [Line Items] |
Property, plant and equipment prohibited from selling period | 5 years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Property, Plant and Equipment Prohibited from Selling Period + References No definition available. + Details
Name: | ntz_PropertyPlantAndEquipmentProhibitedFromSellingPeriod
Namespace Prefix: | ntz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration