Stock-Based Compensation Plans (Details) - USD ($) $ in Thousands	12 Months Ended
Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Stock-based compensation costs recognized for employee services [Abstract]
Stock-based compensation costs arising from equity-settled awards	$ 1,849	$ 1,770	$ 1,439
Stock-based compensation costs arising from cash-settled awards	(18)	(22)	38
Share-based compensation costs	$ 1,831	$ 1,748	$ 1,477
Top of Range [Member]
Stock-Based Compensation Plans [Abstract]
Number of additional subordinate voting shares issuable under the Long-Term Incentive Plan and the Deferred Share Unit Plan (in shares)	11,792,893
Number of subordinate voting shares that may be granted to any individual on an annual basis, percentage	5.00%

The number of instruments available for grant in share-based arrangement.

No definition available.

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- Definition

The percentage of equity instruments that may be granted to any individual.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

The amount of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2019-01-01
-Paragraph 51
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-URIDate 2019-03-27

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- Definition

The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets.

+ References

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- References

No definition available.

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