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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

X

- Details

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