XML 204 R194.htm IDEA: XBRL DOCUMENT
v3.19.1

Subsequents Events - Additional Information (Detail) | Feb. 21, 2019 | Feb. 20, 2019
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Major ordinary share transactions [member] |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Ratio of American Depositary Shares to ordinary shares | 500.00% | 100.00%

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Ratio of American Depositary Shares to ordinary shares. + References No definition available. + Details
Name: | ntz_RatioOfAmericanDepositarySharesToOrdinaryShares
Namespace Prefix: | ntz_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_MajorOrdinaryShareTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |