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v3.25.1

CASH, CASH EQUIVALENTS AND INVESTMENTS - Concentration Risk (Details) | Jan. 31, 2025 | Jan. 31, 2024
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CASH, CASH EQUIVALENTS AND INVESTMENTS |  |
Percentage of cash and cash equivalents held by financial institutions | 2.00% | 12.00%

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- Definition Percentage of company's cash and cash equivalents held by financial institutions. + References No definition available. + Details
Name: | agx_PercentageOfCashAndCashEquivalentsHeldByFinancialInstitutions
Namespace Prefix: | agx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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