XML 33 R21.htm IDEA: XBRL DOCUMENT
v3.22.4

Research and Development | 12 Months Ended
--- | ---
Dec. 31, 2022
Research and Development [Abstract] |
Research and Development | (12) Research and Development Research and development expenses which are included in operating expenses were $10,829, $10,354 and $8,757 for the years ended December 31, 2022, 2021 and 2020, respectively.

X
- Definition Research And Development Disclosure [Text Block] + References No definition available. + Details
Name: | avd_ResearchAndDevelopmentDisclosureTextBlock
Namespace Prefix: | avd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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