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Related-Party Disclosures - Schedule of Compensation of Key Management Personnel and Directors of the Company (Detail) - CAD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of key management personnel compensation [abstract]
Salaries and other short-term employment benefits	$ 9.0	$ 11.3
Directors' fees	0.8	0.8
Share-based compensation	0.9	4.0
Total compensation	$ 10.7	$ 16.1

X

- Definition

The amount of remuneration paid or payable to the entity's directors.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2018-01-01
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-URIDate 2018-03-16

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X

- Definition

The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2018-01-01
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- Definition

The amount of compensation to key management personnel in the form of share-based payments. [Refer: Key management personnel of entity or parent [member]]

+ References

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-Number 24
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-URIDate 2018-03-16

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X

- Definition

The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]

+ References

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- Definition

Disclosure of key management personnel compensation.

+ References

No definition available.

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