Name:	aust_IncreaseDecreaseInPreTaxLossDueToReasonablyPossibleDecreaseInDesignatedRiskComponent
Namespace Prefix:	aust_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The increase (decrease) in pre-tax loss as a result of an increase in a designated risk component that was reasonably possible at the end of the reporting period. Excludes defined benefit plan obligations.

No definition available.

Name:	aust_IncreaseDecreaseInPreTaxLossDueToReasonablyPossibleIncreaseInDesignatedRiskComponent
Namespace Prefix:	aust_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The reasonably possible percentage of the increase (decrease) in the designated risk component used to determine the value of the financial instrument. Excludes defined benefit plan obligations.

No definition available.

Name:	aust_PercentageOfReasonablyPossibleChangeInRiskAssumption
Namespace Prefix:	aust_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The reasonably possible percentage of the decrease in the designated risk component used to determine the value of the financial instrument. Excludes defined benefit plan obligations.

No definition available.

Name:	aust_PercentageOfReasonablyPossibleDecreaseInRiskAssumption
Namespace Prefix:	aust_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The reasonably possible percentage of the increase in the designated risk component used to determine the value of the financial instrument. Excludes defined benefit plan obligations.

No definition available.

Name:	aust_PercentageOfReasonablyPossibleIncreaseInRiskAssumption
Namespace Prefix:	aust_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

No definition available.

Name:	ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=aust_IfrsCashAndCashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_TradeReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_TradingSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=aust_IfrsAccountsPayableAndAccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: