XML 205 R191.htm IDEA: XBRL DOCUMENT v3.21.1

Other Income and Other Expense - Additional information (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Other Income And Expenses [Abstract]
VAT relief	€ 755	€ 1,216	€ 1,392
Reimbursements	498	519
Provisions for legal claims released	€ 100	€ 332	€ 1,700

X

- Definition

The gains (losses) on settlements of litigation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 98
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_98_f&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Disclosure of other income and expenses [abstract]

+ References

No definition available.

+ Details

Name:	ntz_DisclosureOfOtherIncomeAndExpensesAbstract
Namespace Prefix:	ntz_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Provision for value added tax losses.

+ References

No definition available.

+ Details

Name:	ntz_ProvisionForValueAddedTaxLosses
Namespace Prefix:	ntz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of released provisions.

+ References

No definition available.

+ Details

Name:	ntz_ReleasedProvisions
Namespace Prefix:	ntz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration