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Other non-current debts - Additional Information (Details) - EUR (€) € in Thousands	Dec. 31, 2024	Dec. 31, 2023
Other non-current debts [abstract]
Payables to suppliers	€ 465	€ 0

X

- Definition

Other non-current debts.

+ References

No definition available.

+ Details

Name:	ntz_OtherNon-CurrentDebtsAbstract
Namespace Prefix:	ntz_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Trade payables on leasehold improvements.

+ References

No definition available.

+ Details

Name:	ntz_TradePayablesOnLeaseholdImprovements
Namespace Prefix:	ntz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant