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Summary of Business Sales Segmentation as per Product (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Net Sales: |  |  |  |  |  |  |  |  |  |  |
Total crop |  |  |  |  |  |  |  |  | $ 267,710 us-gaap_SalesRevenueGoodsNet | $ 346,514 us-gaap_SalesRevenueGoodsNet | $ 329,540 us-gaap_SalesRevenueGoodsNet
Non-crop |  |  |  |  |  |  |  |  | 30,924 avd_SalesOfNonCropProducts | 34,507 avd_SalesOfNonCropProducts | 36,650 avd_SalesOfNonCropProducts
Net sales | 77,591 us-gaap_SalesRevenueNet | 71,635 us-gaap_SalesRevenueNet | 68,313 us-gaap_SalesRevenueNet | 81,095 us-gaap_SalesRevenueNet | 75,522 us-gaap_SalesRevenueNet | 97,201 us-gaap_SalesRevenueNet | 86,761 us-gaap_SalesRevenueNet | 121,537 us-gaap_SalesRevenueNet | 298,634 us-gaap_SalesRevenueNet | 381,021 us-gaap_SalesRevenueNet | 366,190 us-gaap_SalesRevenueNet
Gross profit | 31,238 us-gaap_GrossProfit | 28,293 us-gaap_GrossProfit | 26,060 us-gaap_GrossProfit | 28,905 us-gaap_GrossProfit | 32,341 us-gaap_GrossProfit | 43,159 us-gaap_GrossProfit | 42,066 us-gaap_GrossProfit | 53,781 us-gaap_GrossProfit | 114,496 us-gaap_GrossProfit | 171,347 us-gaap_GrossProfit | 161,125 us-gaap_GrossProfit
Crop |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 101,633 us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentOneMember | 155,275 us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentOneMember | 142,019 us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentOneMember
Non-crop |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 12,863 us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentTwoMember | 16,072 us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentTwoMember | 19,106 us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentTwoMember
Insecticides |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |
Total crop |  |  |  |  |  |  |  |  | 135,705 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfInsecticidesSoldMember | 193,623 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfInsecticidesSoldMember | 194,060 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfInsecticidesSoldMember
Herbicides/Soil Fumigants/Fungicides |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |
Total crop |  |  |  |  |  |  |  |  | 101,785 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfHerbicidesSoldMember | 121,042 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfHerbicidesSoldMember | 89,899 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfHerbicidesSoldMember
Other, Including Plant Growth Regulators |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |
Total crop |  |  |  |  |  |  |  |  | $ 30,220 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | $ 31,849 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | $ 45,581 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + 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 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and 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(a)) -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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- 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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