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Current Receivables - Disclosure of Current Receivables (Detail) - AUD ($) | Jun. 30, 2025 | Jun. 30, 2024
--- | --- | ---
Disclosure of trade and other receivables [line items] |  |
GST and VAT receivables | $ 1,691,579 | $ 1,251,385
Receivable for grant income | 8,169,349 | 6,093,669
Accounts receivables | 7,460 | 5,242
Current receivables | $ 9,868,388 | $ 7,350,296

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- Definition The amount of current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_b&doctype=Standard -URIDate 2025-03-27 + Details
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Namespace Prefix: | ifrs-full_
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Balance Type: | debit
Period Type: | instant

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- Definition The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph B9 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B9_b&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 54 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_54_h&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_b&doctype=Standard -URIDate 2025-03-27 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Accounts receivable. + References No definition available. + Details
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Namespace Prefix: | immp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Disclosure of trade and other receivables [line items] + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Receivable for grant income. + References No definition available. + Details
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Namespace Prefix: | immp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant