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Subsequent Events - Additional Information (Detail)	Mar. 31, 2015	Mar. 25, 2013	Apr. 01, 2015
Subsequent Event [Line Items]
Equity investment ownership position	21.18%us-gaap_EquityMethodInvestmentOwnershipPercentage	29.27%us-gaap_EquityMethodInvestmentOwnershipPercentage
Subsequent Event | Envance Technologies, LLC] | Before Amendment
Subsequent Event [Line Items]
Equity investment ownership position			60.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = avd_BeforeAmendmentMember / dei_LegalEntityAxis = avd_EnvanceTechnologiesLlcMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Subsequent Event | Envance Technologies, LLC] | After Amendment
Subsequent Event [Line Items]
Equity investment ownership position			87.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = avd_AfterAmendmentMember / dei_LegalEntityAxis = avd_EnvanceTechnologiesLlcMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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