Summary of significant accounting policies - Property, plant and equipment (Details)	12 Months Ended
Dec. 31, 2019
Computer equipment
Property, plant and equipment
Estimated useful life	3 years
Laboratory equipment
Property, plant and equipment
Estimated useful life	4 years
Furniture and fixtures
Property, plant and equipment
Estimated useful life	5 years
Chemical library
Property, plant and equipment
Estimated useful life	5 years

The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2019-01-01
-Paragraph 73
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_c&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration