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Current Expected Credit Losses - Summary of Allowance For Credit Losses Related to Variable Consideration Receivables (Details) - Theatre Operators [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Accounts Receivable Allowance For Credit Loss [Line Items] |  |  |  |
Beginning balance | $ 2,028 | $ 863 | $ 1,887 |
Current period (reversal) provision, net | (933) | 790 | (771) | $ 1,653
Foreign Exchange | (1) | 6 | (22) | 6
Ending balance | $ 1,094 | $ 1,659 | $ 1,094 | $ 1,659

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- Definition Accounts receivable, allowance for credit loss. + References No definition available. + Details
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Namespace Prefix: | imax_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Allowance for doubtful variable consideration foreign exchange. + References No definition available. + Details
Name: | imax_AllowanceForDoubtfulVariableConsiderationForeignExchange
Namespace Prefix: | imax_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition Allowance for doubtful variable consideration receivable. + References No definition available. + Details
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Namespace Prefix: | imax_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Allowance for doubtful variable consideration receivable current provision. + References No definition available. + Details
Name: | imax_AllowanceForDoubtfulVariableConsiderationReceivableCurrentProvision
Namespace Prefix: | imax_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |