SHARE CAPITAL AND OPTION RESERVES - General (Details)	Oct. 25, 2021
SHARE CAPITAL AND OTHER RESERVES
Stock consolidation	3

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

No definition available.

Name:	aust_IfrsStockholdersEquityNoteStockSplitConversionRatio
Namespace Prefix:	aust_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant