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Equity - Reserves and Retained Earnings - Additional Information (Detail) - AUD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Disclosure of reserves within equity [line items]
Conversion of Convertible Notes	$ 0	$ 0

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

X

- Definition

Accumualted losses conversion of convertible notes.

+ References

No definition available.

+ Details

Name:	immp_AccumualtedLossesConversionOfConvertibleNotes
Namespace Prefix:	immp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration