FINANCIAL INSTRUMENT RISK - Foreign Exchange Risk (Details) - Foreign Exchange Risk - CAD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
FINANCIAL INSTRUMENT RISK
Percentage of reasonably possible change in risk assumption	10.00%	10.00%
Increase in loss and comprehensive loss due to change in reasonably possible risk assumption		$ 2,535	$ 66,935

The increase (decrease) in profit and loss and comprehensive profit and loss as a result of an increase (decrease) 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_IncreaseDecreaseInProfitLossAndComprehensiveProfitLossDueToReasonablyPossibleChangeInDesignatedRiskComponent
Namespace Prefix:	aust_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration