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Subsequent Event - Additional Information (Detail) | Jul. 01, 2019 Productline
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Subsequent Events [Abstract] |
Number of product lines | 3

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- Definition Number of product lines. + References No definition available. + Details
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Namespace Prefix: | avd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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