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NOTES RECEIVABLE AND ACCRUED INTEREST (Details) | Jan. 31, 2016 USD ($)
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NOTES RECEIVABLE AND ACCRUED INTEREST |
Notes receivable allowance for uncollectible amounts | $ 208,000

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- 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

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- References No definition available. + Details
Name: | us-gaap_AccountsAndNotesReceivableNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration