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NOTES RECEIVABLE AND ACCRUED INTEREST - Additional Information (Details)	Oct. 31, 2015 USD ($)
NOTES RECEIVABLE AND ACCRUED INTEREST
Notes receivable allowance for uncollectible amounts	$ 208,000

X

- Definition

A valuation allowance for notes receivables due a company that are expected to be uncollectible.

+ References

No definition available.

+ Details

Name:	agx_NotesReceivableAllowanceForDoubtfulAccountsReceivable
Namespace Prefix:	agx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountsAndNotesReceivableNetAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration