XML 229 R219.htm IDEA: XBRL DOCUMENT
v3.19.1

Explanation of the Effects of Transition to International Financial Reporting Standards - Summary of Impact of IFRS Adjustments on Exchange Rate Differences on Translation of Foreign Operations (Detail) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 EUR (€)
Disclosure of impact of IFRS adjustments on exchange rate differences on translation of foreign operations [abstract] |
Beginning balance | € (11,419)
Functional currency adjustment | 3,641
Ending balance | € (7,778)

X
- Definition Disclosure of impact of IFRS adjustments on exchange rate differences on translation of foreign operations [abstract] + References No definition available. + Details
Name: | ntz_DisclosureOfImpactOfIFRSAdjustmentsOnExchangeRateDifferencesOnTranslationOfForeignOperationsAbstract
Namespace Prefix: | ntz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exchange rate differences on translation of foreign operations. + References No definition available. + Details
Name: | ntz_ExchangeRateDifferencesOnTranslationOfForeignOperations
Namespace Prefix: | ntz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Functional currency adjustment. + References No definition available. + Details
Name: | ntz_FunctionalCurrencyAdjustment
Namespace Prefix: | ntz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration