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.

No definition available.

+ Details

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

- Definition

The amount of leases where the entity was the lessee in related party transactions. [Refer: Related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 24
-IssueDate 2016-01-13
-Paragraph 21
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2016-03-30&anchor=para_21_d&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_LeasesAsLesseeRelatedPartyTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of goods purchased by the entity in related party transactions. [Refer: Related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 24
-IssueDate 2016-01-13
-Paragraph 21
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2016-03-30&anchor=para_21_a&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_PurchasesOfGoodsRelatedPartyTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=vjet_SchlossereiUndMetallbauEdererDieenSupplierMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=vjet_OfficeSpaceInAugsburgGermanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=vjet_FranzIndustriebeteiligungenAgAugsburgLessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=vjet_AdministrativeBuildingInFriedbergMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related party transactions - Other (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schlosserei und Metallbau Ederer, Dießen
Related parties
Acquired goods	€ 15	€ 15	€ 38
Office space Augsburg, Germany \| Franz Industriebeteiligungen AG, Augsburg
Related parties
Rent expense		2	2	€ 2
Use of paintings in administrative building \| Schlosserei und Metallbau Ederer, Dießen
Related parties
Rent expense		€ 2	€ 2	€ 2