XML 62 R203.htm IDEA: XBRL DOCUMENT
v3.20.1

Expenses by Nature - Summary of Depreciation and Amortization (Detail) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2017
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Amortisation of intangible assets | € 917 | € 910 |  | € 1,569
Government grants | (1,626) | (1,061) | € (1,068) | (1,068)
Total depreciation and amortization | 23,487 | 10,003 |  | 11,362
Cost of sales [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Depreciation | 7,867 | 7,455 |  | 8,565
Amortisation of intangible assets | 14 | 34 |  | 73
Government grants | (1,463) | (1,061) |  | (1,068)
Total depreciation and amortization | 10,260 | 6,428 |  | 7,570
Cost of sales [member] | Right-of-use assets [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Depreciation | 3,842 |  |  |
Selling expenses [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Depreciation | 9,084 |  |  |
Amortisation of intangible assets |  |  |  | 306
Total depreciation and amortization | 11,805 | 2,274 |  | 2,124
Selling expenses [member] | Property, plant and equipment [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Depreciation | 2,721 | 2,274 |  | 1,818
Selling expenses [member] | Intangible assets [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Amortisation of intangible assets |  |  |  |
Administrative expenses [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Amortisation of intangible assets | 903 | 876 |  | 1,190
Government grants | (163) |  |  |
Total depreciation and amortization | 1,422 | 1,301 |  | 1,668
Administrative expenses [member] | Property, plant and equipment [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Depreciation | 381 | 425 |  | 478
Administrative expenses [member] | Right-of-use assets [member] |  |  |  |
Disclosure Of Depreciation And Amortization [line items] |  |  |  |
Depreciation | € 301 |  |  |

X
- Definition The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_AmortisationExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of depreciation and amortisation expense. Depreciation and amortisation are the systematic allocations of depreciable amounts of assets over their useful lives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 23 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_23_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 28 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_28_e&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B13 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B13_d&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_102&doctype=Standard -URIDate 2019-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_99&doctype=Standard -URIDate 2019-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 104 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_104&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DepreciationAndAmortisationExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of depreciation expense. Depreciation is the systematic allocation of depreciable amounts of tangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DepreciationExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of income recognised in relation to government grants. [Refer: Government grants] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 20 -IssueDate 2019-01-01 -Paragraph 39 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=20&code=ifrs-tx-2019-en-r&anchor=para_39_b&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_RevenueFromGovernmentGrants
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Depreciation and amortization net of government grants. + References No definition available. + Details
Name: | ntz_DepreciationAndAmortizationNetOfGovernmentGrants
Namespace Prefix: | ntz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Disclosure Of Depreciation And Amortization [line items] + References No definition available. + Details
Name: | ntz_DisclosureOfDepreciationAndAmortizationLineItems
Namespace Prefix: | ntz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ntz_IncomeStatementLocation1Axis=ntz_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_RightofuseAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ntz_IncomeStatementLocation1Axis=ntz_SellingExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_PropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ntz_IntangibleAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ntz_IncomeStatementLocation1Axis=ntz_AdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |