Share Capital and Other Equity Instruments - Schedule Of Restricted Stock Units and Awards Activity (Details)	3 Months Ended
Mar. 31, 2021 $ / shares shares
Restricted Stock Awards [Member]
Number of shares, Nonvested at beginning \| shares
Number of shares, Granted \| shares	70,986
Number of shares, Vested \| shares	(44,390)
Number of shares, Nonvested at end \| shares	26,596
Weighted average grant date fair value, Non-vested at beginning \| $ / shares
Weighted average grant date fair value, Granted \| $ / shares	4.16
Weighted average grant date fair value, Vested \| $ / shares	4.49
Weighted average grant date fair value, Non-Vested at end \| $ / shares	$ 3.61
Restricted Stock Units [Member]
Number of shares, Nonvested at beginning \| shares
Number of shares, Granted \| shares	3,279,284
Number of shares, Vested \| shares	(1,207,825)
Number of shares, Nonvested at end \| shares	2,071,459
Weighted average grant date fair value, Non-vested at beginning \| $ / shares
Weighted average grant date fair value, Granted \| $ / shares	4.41
Weighted average grant date fair value, Vested \| $ / shares	4.46
Weighted average grant date fair value, Non-Vested at end \| $ / shares	$ 4.38

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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-Section 50
-Paragraph 2
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