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Non-financial assets and liabilities - Schedule of Movements Related to Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Jun. 30, 2023
Deferred Tax Assets And Liabilities [Line Items] |  |
Beginning balance | $ 0 | $ 0
Charged/(credited) to: |  |
- profit or loss | (102) | (212)
- directly to equity | 102 | 212
Ending balance | 0 | 0
Tax losses (DTA) |  |
Deferred Tax Assets And Liabilities [Line Items] |  |
Beginning balance | (76,020) | (80,411)
Charged/(credited) to: |  |
- profit or loss | 1,234 | 4,179
- directly to equity | 102 | 212
Ending balance | (74,684) | (76,020)
Other Temporary Differences (DTA) |  |
Deferred Tax Assets And Liabilities [Line Items] |  |
Beginning balance | (11,972) | (7,831)
Charged/(credited) to: |  |
- profit or loss | (1,213) | (4,141)
- directly to equity | 0 | 0
Ending balance | (13,185) | (11,972)
Intangible assets (DTL) |  |
Deferred Tax Assets And Liabilities [Line Items] |  |
Beginning balance | 87,992 | 88,242
Charged/(credited) to: |  |
- profit or loss | (123) | (250)
- directly to equity | 0 | 0
Ending balance | $ 87,869 | $ 87,992

X
- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_DeferredTaxLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of the net movement in regulatory deferral account balances related to profit or loss and the net movement in related deferred tax. [Refer: Net movement in regulatory deferral account balances related to profit or loss; Net movement in deferred tax arising from regulatory deferral account balances related to profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 14 -IssueDate 2023-01-01 -Paragraph 24 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=14&code=ifrs-tx-2023-en-r&anchor=para_24&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 14 -IssueDate 2023-01-01 -Paragraph B12 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=14&code=ifrs-tx-2023-en-r&anchor=para_B12_a&doctype=Appendix&subtype=B -URIDate 2023-03-23 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred tax assets and liabilities. + References No definition available. + Details
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Namespace Prefix: | meso_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred tax assets and liabilities relating to charged or credited. + References No definition available. + Details
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Namespace Prefix: | meso_
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X
- Definition Net movement in regulatory deferral account balances related to directly to equity. + References No definition available. + Details
Name: | meso_NetMovementInRegulatoryDeferralAccountBalancesRelatedToDirectlyToEquity
Namespace Prefix: | meso_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
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X
- Details
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Data Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |