XML 105 R68.htm IDEA: XBRL DOCUMENT v3.8.0.1

Share-based Payments - Summary of Share Options and Weighted Average Exercise Prices (Parenthetical) (Details) - GBP (£)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Abstract]
Weighted average share price for share options at date of exercise	£ 10.43	£ 9.00
Vesting period of share options exercised	4 years

X

- References

No definition available.

+ Details

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

X

- Definition

The weighted average share price at the date of exercise for share options that are exercised in a share-based payment arrangement. [Refer: Share-based payment arrangements [member]; Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 45
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_c&doctype=Standard
-URIDate 2017-03-09

+ Details

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

X

- Definition

Vesting period of share options exercised.

+ References

No definition available.

+ Details

Name:	ncna_VestingPeriodOfShareOptionsExercised
Namespace Prefix:	ncna_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration