XML 63 R53.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Litigation and Environmental - Additional Information (Detail) |  | 9 Months Ended
--- | --- | ---
Aug. 21, 2012 Person Case | Sep. 30, 2016 a
Delaware |  |
Loss Contingencies [Line Items] |  |
Number of claimants | Person | 235 |
Number of consolidated cases | Case | 1 |
DeChene Farms Matter |  |
Loss Contingencies [Line Items] |  |
Number of acres | a |  | 300

X
- Definition Consolidated cases number of lawsuits. + References No definition available. + Details
Name: | avd_ConsolidatedCasesNumberOfLawsuits
Namespace Prefix: | avd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of acres. + References No definition available. + Details
Name: | avd_NumberOfAcres
Namespace Prefix: | avd_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of plaintiffs that have filed claims pertaining to a loss contingency. + References No definition available. + Details
Name: | us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LitigationCaseAxis=avd_DEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationCaseAxis=avd_DeCheneFarmsMatterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |