Additional information on the consolidated statements of loss - Disclosure of employee benefits (Details) - CAD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Additional Information On Consolidated Statements Of Loss Line Items
Employee benefit expenses	$ 20,701	$ 14,015
Employee benefit expenses [Member]
Additional Information On Consolidated Statements Of Loss Line Items
Salaries and wages	15,122	12,705
Share-based compensation	8,328	5,791
Cost recoveries from associates	(2,749)	(4,481)
Employee benefit expenses	$ 20,701	$ 14,015

The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 102
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_102&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 99
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_99&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 104
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_104&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_EmployeeBenefitsExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration