Share based payment arrangement options expiry date.

No definition available.

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Namespace Prefix:	dbvt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Share based payment arrangement options granted discount rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	dbvt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Share based payment arrangement share entitlement per stock granted.

+ References

No definition available.

+ Details

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Namespace Prefix:	dbvt_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Valuation method used.

+ References

No definition available.

+ Details

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Namespace Prefix:	dbvt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Vesting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	dbvt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard
-URIDate 2017-03-09

+ Details

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

- Definition

The option life of share options granted.

+ References

+ Details

Name:	ifrs-full_DescriptionOfOptionLifeShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
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_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of an expected dividend used to calculate the fair value of share options granted.

+ References

+ Details

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

- Definition

The number of share options granted in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 45
-Subparagraph b
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_b_ii&doctype=Standard
-URIDate 2017-03-09

+ Details

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

- Definition

The weighted average exercise price of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard
-URIDate 2017-03-09

+ Details

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

- Definition

The weighted average fair value at the measurement date of granted equity instruments other than share options. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_b&doctype=Standard
-URIDate 2017-03-09

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 47
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a&doctype=Standard
-URIDate 2017-03-09

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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Namespace Prefix:
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- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Share-Based Payments - Summary Details of BSA2 (Detail)		12 Months Ended
Share-Based Payments - Summary Details of BSA2 (Detail)	Jan. 20, 2019 EUR (€) € / shares	Dec. 31, 2017	Dec. 15, 2017 € / shares	Dec. 05, 2017 € / shares	Dec. 31, 2016	Dec. 31, 2015
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of options granted			8,300	625,200
Share entitlement per BSA2 \| € / shares			€ 1	€ 1
BSA 2 [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of options granted		0			0	0
Board of Director [Member] \| BSA 2 [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period (years)	0 years
Plan expiration date	Jan. 20, 2019
Number of options granted	4,822
Share entitlement per BSA2 \| € / shares	€ 15
Exercise price (in euros)	€ 65
Valuation method used
Grant date share fair value (in euros)	€ 70
Expected volatility	40.00%
Average life of BCE2010 (in years)	0
Discount rate	2.71%
Expected dividends	0.00%
Fair value per BSA2 (in euros)	€ 29.05
Board of Director [Member] \| BSA 2 [Member] \| First Anniversary [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period (years)	1 year
Plan expiration date	Jan. 20, 2019
Number of options granted	2,680
Share entitlement per BSA2 \| € / shares	€ 15
Exercise price (in euros)	€ 65
Valuation method used
Grant date share fair value (in euros)	€ 70
Expected volatility	40.00%
Average life of BCE2010 (in years)	0
Discount rate	2.71%
Expected dividends	0.00%
Fair value per BSA2 (in euros)	€ 30.32
Board of Director [Member] \| BSA 2 [Member] \| Second Anniversary [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period (years)	2 years
Plan expiration date	Jan. 20, 2019
Number of options granted	1,072
Share entitlement per BSA2 \| € / shares	€ 15
Exercise price (in euros)	€ 65
Valuation method used
Grant date share fair value (in euros)	€ 70
Expected volatility	40.00%
Average life of BCE2010 (in years)	0
Discount rate	2.98%
Expected dividends	0.00%
Fair value per BSA2 (in euros)	€ 31.89
Board of Director [Member] \| BSA 2 [Member] \| Third Anniversary [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period (years)	3 years
Plan expiration date	Jan. 20, 2019
Number of options granted	1,072
Share entitlement per BSA2 \| € / shares	€ 15
Exercise price (in euros)	€ 65
Valuation method used
Grant date share fair value (in euros)	€ 70
Expected volatility	40.00%
Average life of BCE2010 (in years)	0
Discount rate	2.98%
Expected dividends	0.00%
Fair value per BSA2 (in euros)	€ 33.05
Board of Director [Member] \| BSA 2 [Member] \| Fourth Anniversary [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period (years)	4 years
Plan expiration date	Jan. 20, 2019
Number of options granted	1,070
Share entitlement per BSA2 \| € / shares	€ 15
Exercise price (in euros)	€ 65
Valuation method used
Grant date share fair value (in euros)	€ 70
Expected volatility	40.00%
Average life of BCE2010 (in years)	0
Discount rate	3.11%
Expected dividends	0.00%
Fair value per BSA2 (in euros)	€ 33.45