COMMITMENTS - Warranties (Details)	3 Months Ended
Apr. 30, 2024
Minimum
Warranty period	P9M
Maximum
Warranty period	P24M

Represents the information pertaining to warranty provisions covering defects in equipment, materials etc.. after the completion of construction.

No definition available.

Name:	agx_WarrantyPeriodForConstructionContracts
Namespace Prefix:	agx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration