XML 97 R60.htm IDEA: XBRL DOCUMENT v3.8.0.1

Share Capital and Share Premium - Summary of Share Capital and Share Premium (Details) - GBP (£) £ in Thousands	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Classes Of Share Capital [Line Items]
Share capital	£ 1,272		£ 663	£ 659
Share premium	79,236		42,770	42,574
Share capital and share premium	£ 80,508		£ 43,433	£ 43,233
Ordinary shares of £0.04 each (2016 and 2015: £0.01 each)	31,811,000	30,000	24,185,000	24,102,000
Ordinary Shares
Disclosure Of Classes Of Share Capital [Line Items]
Ordinary shares of £0.04 each (2016 and 2015: £0.01 each)	31,811,000		6,239,000	6,156,000
Founder Ordinary 1 Shares
Disclosure Of Classes Of Share Capital [Line Items]
Ordinary shares of £0.04 each (2016 and 2015: £0.01 each)			1,000,000	1,000,000
Founder Ordinary 2 Shares
Disclosure Of Classes Of Share Capital [Line Items]
Ordinary shares of £0.04 each (2016 and 2015: £0.01 each)			1,000,000	1,000,000
Series A Shares
Disclosure Of Classes Of Share Capital [Line Items]
Ordinary shares of £0.04 each (2016 and 2015: £0.01 each)			7,483,000	7,483,000
Series B Shares
Disclosure Of Classes Of Share Capital [Line Items]
Ordinary shares of £0.04 each (2016 and 2015: £0.01 each)			8,463,000	8,463,000

X

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

X

- Definition

The nominal value of capital issued.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2017-03-09

+ Details

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

X

- Definition

The number of shares issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_106_d&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_NumberOfSharesIssued
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount received or receivable from the issuance of the entity's shares in excess of nominal value.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2017-03-09

+ Details

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

X

- Definition

Share capital and share premium.

+ References

No definition available.

+ Details

Name:	ncna_ShareCapitalAndSharePremium
Namespace Prefix:	ncna_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_FounderOrdinaryOneSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_FounderOrdinaryTwoSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_SeriesASharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_SeriesBSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: