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: