XML 168 R153.htm IDEA: XBRL DOCUMENT
v3.22.1

Employees' Leaving Entitlement - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Changes In Net Defined Benefit Liability Asset [Abstract] |  |
Average duration of defined benefit plans | 10 years 6 months | 10 years 6 months

X
- References No definition available. + Details
Name: | ifrs-full_ChangesInNetDefinedBenefitLiabilityAssetAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average duration of defined benefit plans. + References No definition available. + Details
Name: | ntz_AverageDurationOfDefinedBenefitPlans
Namespace Prefix: | ntz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration