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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
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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

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- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration