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Reclassifications | 3 Months Ended
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Mar. 31, 2021
Text Block [Abstract] |
Reclassifications | 11. Reclassifications — Certain items have been reclassified in the prior period condensed consolidated financial statements to conform with the March 31, 2021 presentation.

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- Definition Disclosure of certain items which may have been reclassified (if appropriate), in the prior period consolidated financial statements to conform with the current presentation. + References No definition available. + Details
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Namespace Prefix: | avd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration