Revenue from contracts with customers - Additional Information (Details) € in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020 EUR (€) customer	Jun. 30, 2019 EUR (€)	Jun. 30, 2020 EUR (€) customer	Jun. 30, 2019 EUR (€)
Revenue from contracts with customers
Revenue from contracts with customers	€ 9,719	€ 11,206	€ 21,824	€ 21,921
Provision for expected credit losses on contract assets	€ 500	€ 122	€ 1,674	€ 462
Pharmaceutical Partner
Revenue from contracts with customers
Number of customer in group \| customer	1		1
Revenue contributed by one pharmaceutical partner, as a percentage of Group's total revenues	26.20%	26.70%	26.40%	27.10%
Revenue from contracts with customers	€ 0	€ 80	€ 0	€ 430

It represents the number of customer in group.

No definition available.

Name:	cntg_NumberOfCustomersInGroup
Namespace Prefix:	cntg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of provision for expected credit losses on contract assets, recognized by the company.

+ References

No definition available.

+ Details

Name:	cntg_ProvisionForExpectedCreditLossesOnContractAssets
Namespace Prefix:	cntg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Definition

The percentage of the entity's revenue. [Refer: Revenue]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 8
-IssueDate 2019-01-01
-Paragraph 34
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_34&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_PercentageOfEntitysRevenue
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2019-01-01
-Paragraph 113
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_113_a&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2019-01-01
-Paragraph 114
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_114&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_RevenueFromContractsWithCustomers
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	ifrs-full_MajorCustomersAxis=cntg_PharmaceuticalPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: