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Key Management Personnel Disclosures - Additional Information (Detail) | 12 Months Ended
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Jun. 30, 2023
Directors and other Key Management Personnel [member] |
Disclosure of number and weighted average exercise price of outstanding share options [line items] |
Number of shares granted | 0

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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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- Definition Disclosure of number and weighted average exercise price of outstanding share option. + References No definition available. + Details
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Namespace Prefix: | immp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | immp_TitleOfIndividual1Axis=immp_DirectorsAndOtherKeyManagementPersonnelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |