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Reclassification | 6 Months Ended
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Jun. 30, 2019
Text Block [Abstract] |
Reclassification | 11. Reclassification—Certain items may have been reclassified in the prior period condensed consolidated financial statements to conform with the June 30, 2019 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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Period Type: | duration