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Summary of Business Sales Segmentation as per Location (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Net Sales: |  |
Net sales | $ 66,565 us-gaap_SalesRevenueNet | $ 81,095 us-gaap_SalesRevenueNet
US |  |
Net Sales: |  |
Net sales | 49,222 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = avd_DomesticSalesMember | 57,956 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = avd_DomesticSalesMember
International |  |
Net Sales: |  |
Net sales | $ 17,343 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = avd_ForeignSalesMember | $ 23,139 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = avd_ForeignSalesMember

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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