XML 153 R143.htm IDEA: XBRL DOCUMENT
v3.19.1

Deferred Income for Capital Grants - Summary of Changes in the Carrying Amount of Deferred Income for Capital Grants (Detail) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Accruals and deferred income [abstract] |  |
Deferred income beginning balance | € 13,771 | € 14,760
Additions | 292 | 79
Charges to profit or loss | (1,061) | (1,068)
Deferred income ending balance | € 13,002 | € 13,771

X
- References No definition available. + Details
Name: | ifrs-full_AccrualsAndDeferredIncomeAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of non-current government grants recognised on the statement of financial position as deferred income. [Refer: Government [member]; Deferred income; Government grants] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NoncurrentGovernmentGrants
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred income additions. + References No definition available. + Details
Name: | ntz_DeferredIncomeAdditions
Namespace Prefix: | ntz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase decrease in deferred income. + References No definition available. + Details
Name: | ntz_IncreaseDecreaseInDeferredIncome
Namespace Prefix: | ntz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration