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Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2023 AUD ($)
Disclosure of detailed information about leases asset in right of use assets [line items]
Expense relating to short-term leases for which recognition exemption has been used	$ 6,539
Expense relating to leases of low-value assets for which recognition exemption has been used	$ 5,782
Bottom of range [member]
Disclosure of detailed information about leases asset in right of use assets [line items]
Rental Contracts Period	1 year
Extention Option Rental Contracts Period	3 months
Top of range [member]
Disclosure of detailed information about leases asset in right of use assets [line items]
Rental Contracts Period	3 years
Extention Option Rental Contracts Period	1 year
Lease Classification Threshold Amount	$ 12,000

X

- Definition

The amount of the expense relating to leases of low-value assets accounted for applying paragraph 6 of IFRS 16. This expense shall not include the expense relating to short-term leases of low-value assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 53
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_d&doctype=Standard
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of the expense relating to short-term leases accounted for applying paragraph 6 of IFRS 16. This expense need not include the expense relating to leases with a lease term of one month or less. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 53
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_c&doctype=Standard
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Disclosure of leases included in right of use assets [Line items].

+ References

No definition available.

+ Details

Name:	immp_DisclosureOfLeasesIncludedInRightOfUseAssetsLineItems
Namespace Prefix:	immp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Extention Option Rental Contracts Period

+ References

No definition available.

+ Details

Name:	immp_ExtentionOptionRentalContractsPeriod
Namespace Prefix:	immp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lease classification threshold amount.

+ References

No definition available.

+ Details

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

X

- Definition

Rental contracts, period.

+ References

No definition available.

+ Details

Name:	immp_RentalContractsPeriod
Namespace Prefix:	immp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: