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Condensed Consolidated Statements of Cash Flows Supplemental Information - Summary of Depreciation and Amortization (Parenthetical) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Amortization of intangible assets net in research and development	$ 1.0	$ 1.0

X

- Definition

Amortization of intangible assets net in research and development.

+ References

No definition available.

+ Details

Name:	imax_AmortizationOfIntangibleAssetsNetInResearchAndDevelopment
Namespace Prefix:	imax_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration