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v3.7.0.1

Cost Method Investment - Additional Information (Detail) | Jun. 30, 2016
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Bi-PA |
Schedule of Cost-method Investments [Line Items] |
Cost method ownership percentage | 15.00%

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- Definition Cost Method Ownership Percentage + References No definition available. + Details
Name: | avd_CostMethodOwnershipPercentage
Namespace Prefix: | avd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCostMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=avd_BiPaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |