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v2.4.0.6

Major Customers and Export Sales - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Customer One |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage to company consolidated sales | 24.00% | 26.00% | 23.00%
Percentage of customer receivables | 20.00% | 17.00% | 15.00%
Customer Two |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage to company consolidated sales | 19.00% | 18.00% | 19.00%
Percentage of customer receivables | 11.00% | 15.00% | 12.00%
Customer Three |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage to company consolidated sales | 10.00% | 11.00% | 11.00%
Percentage of customer receivables | 7.00% | 9.00% | 8.00%

X
- Definition Entity Wide Trade Receivables Major Customer Percentage + References No definition available. + Details
Name: | avd_EntityWideTradeReceivablesMajorCustomerPercentage
Namespace Prefix: | avd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration