XML 110 R96.htm IDEA: XBRL DOCUMENT
v3.25.2

Financial Instruments - Schedule of Interest Rates and the Effective Weighted Average Interest Rate for Classes of Financial Assets and Liabilities (Details) - AUD ($) | 12 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Financial Assets |  |
Total Financial Assets | $ 44,638,064 | $ 16,721,228
Financial Liabilities |  |
Total Financial Liabilities | (2,730,947) | (4,878,992)
Floating Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets | 30,698,409 | 11,529,456
Financial Liabilities |  |
Total Financial Liabilities |  |
Non-Interest Bearing [Member] |  |
Financial Assets |  |
Total Financial Assets | 6,411,540 | 5,165,974
Financial Liabilities |  |
Total Financial Liabilities | (2,575,490) | (4,719,947)
1 year or less [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets | 7,528,215 | 25,798
Financial Liabilities |  |
Total Financial Liabilities | (66,912) | (107,131)
1-5 years [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets |  |
Financial Liabilities |  |
Total Financial Liabilities | (88,545) | (51,914)
Cash and Cash Equivalents [Member] |  |
Financial Assets |  |
Total Financial Assets | 33,158,642 | 12,638,885
Cash and Cash Equivalents [Member] | Floating Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets | 30,698,409 | 11,529,456
Cash and Cash Equivalents [Member] | Non-Interest Bearing [Member] |  |
Financial Assets |  |
Total Financial Assets | $ 2,463,168 | $ 1,113,722
Cash and Cash Equivalents [Member] | Interest Rate Risk [Member] |  |
Financial Assets |  |
Average Interest Rate | 3.13% | 2.463%
Cash and Cash Equivalents [Member] | 1 year or less [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets | $ (2,835) | $ (4,293)
Cash and Cash Equivalents [Member] | 1-5 years [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets |  |
Trade and Other Receivables [Member] |  |
Financial Assets |  |
Total Financial Assets | 3,937,607 | 4,041,675
Trade and Other Receivables [Member] | Floating Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets |  |
Trade and Other Receivables [Member] | Non-Interest Bearing [Member] |  |
Financial Assets |  |
Total Financial Assets | 3,937,607 | 4,041,675
Trade and Other Receivables [Member] | 1 year or less [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets |  |
Trade and Other Receivables [Member] | 1-5 years [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets |  |
Other current asset [Member] |  |
Financial Assets |  |
Total Financial Assets | 7,541,815 | 40,668
Other current asset [Member] | Floating Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets |  |
Other current asset [Member] | Non-Interest Bearing [Member] |  |
Financial Assets |  |
Total Financial Assets | $ 10,765 | $ 10,577
Other current asset [Member] | Interest Rate Risk [Member] |  |
Financial Assets |  |
Average Interest Rate | 4.40% | 3.515%
Other current asset [Member] | 1 year or less [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets | $ 7,531,050 | $ 30,091
Other current asset [Member] | 1-5 years [Member] | Fixed Interest Rate [Member] |  |
Financial Assets |  |
Total Financial Assets |  |
Trade and Other Payables [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities | (2,575,490) | (4,619,947)
Trade and Other Payables [Member] | Floating Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |
Trade and Other Payables [Member] | Non-Interest Bearing [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities | (2,575,490) | (4,619,947)
Trade and Other Payables [Member] | 1 year or less [Member] | Fixed Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |
Trade and Other Payables [Member] | 1-5 years [Member] | Fixed Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |
Lease Liabilities [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities | (155,457) | (159,045)
Lease Liabilities [Member] | Floating Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |
Lease Liabilities [Member] | Non-Interest Bearing [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |
Lease Liabilities [Member] | 1 year or less [Member] | Fixed Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities | (66,912) | (107,131)
Lease Liabilities [Member] | 1-5 years [Member] | Fixed Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities | $ (88,545) | (51,914)
Other Current Liabilities [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  | (100,000)
Other Current Liabilities [Member] | Floating Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |
Other Current Liabilities [Member] | Non-Interest Bearing [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  | (100,000)
Other Current Liabilities [Member] | 1 year or less [Member] | Fixed Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |
Other Current Liabilities [Member] | 1-5 years [Member] | Fixed Interest Rate [Member] |  |
Financial Liabilities |  |
Total Financial Liabilities |  |

X
- Definition Percentage of average interest rate. + References No definition available. + Details
Name: | athe_AverageInterestRate
Namespace Prefix: | athe_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | athe_FinancialAssetsAbstract
Namespace Prefix: | athe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | athe_FinancialLiabilitiesAbstract
Namespace Prefix: | athe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35H&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35M&doctype=Standard -URIDate 2024-03-27 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35N&doctype=Standard -URIDate 2024-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35I&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_FinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_FinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FloatingInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=athe_NonInterestBearingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FixedInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=athe_CashAndCashEquivalentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=athe_TradeAndOtherReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=athe_OtherCurrentAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=athe_TradeAndOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_LeaseLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=athe_OtherCurrentLiabilitieMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |