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Research and Development	12 Months Ended
	Dec. 31, 2012
Research and Development	(10) Research and Development Research and development expenses which are included in operating expenses were $7,648, $6,555 and $5,876 for the years ended December 31, 2012, 2011 and 2010.

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Research And Development Disclosure [Text Block]

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Namespace Prefix:	avd_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration