XML 112 R98.htm IDEA: XBRL DOCUMENT v3.21.1

Operating Segment - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 Segment
Disclosure Of Operating Segments [Abstract]
Number of operating segments	2
Number of reporting segments	1

X

- References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfOperatingSegmentsAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of operating business segments.

+ References

No definition available.

+ Details

Name:	ntz_NumberOfOperatingBusinessSegments
Namespace Prefix:	ntz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	ntz_NumberOfReportingSegments
Namespace Prefix:	ntz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration