Capital Stock - Restricted Stock Units Activity under the IMAX LTIP (Details) - Restricted Share Units [Member] - $ / shares	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, beginning of period	1,065,347	1,033,871
Granted	1,050,385	649,389
Vested and settled	(386,451)	(367,020)
Forfeited	(54,933)	(206,593)
RSUs outstanding, end of period	1,674,348	1,109,647
RSUs outstanding, weighted average grant date fair value per share, beginning of period	$ 23.17	$ 25.70
Granted, weighted average grant date fair value per share	15.35	22.33
Vested and settled, weighted average grant date fair value per share	21.59	26.66
Forfeited, weighted average grant date fair value per share	19.70	23.77
RSUs outstanding, weighted average grant date fair value per share, end of period	$ 18.75	$ 23.77

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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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).

+ References

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-Publisher FASB
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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).

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

+ References

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- Definition

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

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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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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