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Events Occurring After the Reporting Date - Additional Information (Detail) - AUD ($) $ in Thousands	Sep. 16, 2024	Aug. 19, 2024
Research And Development Expense [Member]
Disclosure of non-adjusting events after reporting period [line items]
Tax grants received	$ 2,200	$ 549

X

- Definition

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

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tax grants received.

+ References

No definition available.

+ Details

Name:	immp_TaxGrantsReceived
Namespace Prefix:	immp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=immp_ResearchAndDevelopmentExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: