XML 188 R185.htm IDEA: XBRL DOCUMENT
v3.20.1

Other Income and Other Expense - Additional information (Detail) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of other income and expenses [abstract] |  |  |
Provisions for legal claims released | € 332 | € 1,700 |
VAT relief | 1,216 | € 1,392 |
Litigation settlements | € 519 |  | € 1,650

X
- Definition The gains (losses) on settlements of litigation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 98 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_98_f&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_GainsLossesOnLitigationSettlements
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