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v3.25.3

Income Tax Expense - Additional Information (Detail) - AUD ($) | 12 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Deferred Tax Assets And Liabilities [line Items] |  |  |
Cumulative tax losses | $ 399,133,050 | $ 310,330,626 | $ 221,070,595

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- Definition Cumulative tax losses + References No definition available. + Details
Name: | immp_CumulativeTaxLosses
Namespace Prefix: | immp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Deferred tax assets and liabilities line items + References No definition available. + Details
Name: | immp_DeferredTaxAssetsAndLiabilitiesLineItems
Namespace Prefix: | immp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration