SIGNIFICANT ACCOUNTING POLICIES - Impairment of non-financial assets (Details)	12 Months Ended
Dec. 31, 2022 USD ($)
SIGNIFICANT ACCOUNTING POLICIES
Impairment loss on non-financial assets	$ 0

The amount of impairment loss on non-financial assets.

No definition available.

Name:	aust_ImpairmentLossOnNonfinancialAssets
Namespace Prefix:	aust_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration