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Subsequent Events - Additional Information (Detail) | Mar. 31, 2015 | Mar. 25, 2013 | Apr. 01, 2015
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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

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- 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 + Details
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- Details
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- Details
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