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Other Non-Current Assets - Disclosure of Other Noncurrent Assets (Detail) - AUD ($) | Jun. 30, 2023 | Jun. 30, 2022
--- | --- | ---
Other Noncurrent Assets [Abstract] |  |
Prepayments | $ 2,524,911 | $ 495,660
Other non-current assets | $ 2,524,911 | $ 495,660

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- Definition The amount of non-current prepayments. [Refer: Prepayments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_78_b&doctype=Standard -URIDate 2023-03-23 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of non-current assets that the entity does not separately disclose in the same statement or note. [Refer: Non-current assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_OtherNoncurrentAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Other noncurrent assets. + References No definition available. + Details
Name: | immp_OtherNoncurrentAssetsAbstract
Namespace Prefix: | immp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration