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Schedule of Company's Obligations Under Product Acquisitions and Licensing Agreements (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Business Acquisition, Contingent Consideration [Line Items] |  |  |
Beginning Balance | $ 3,886 us-gaap_AssetRetirementObligationsNoncurrent | $ 11,900 us-gaap_AssetRetirementObligationsNoncurrent | $ 17,624 us-gaap_AssetRetirementObligationsNoncurrent
Additional obligations acquired |  |  | 1,073 avd_AssetRetirementObligationLiabilitiesAddedFromAcquisitions
Adjustment to deferred liabilities | (32)us-gaap_AssetRetirementObligationPeriodIncreaseDecrease | (297)us-gaap_AssetRetirementObligationPeriodIncreaseDecrease | (216)us-gaap_AssetRetirementObligationPeriodIncreaseDecrease
FX impact |  | (1)avd_AssetRetirementObligationsGainLoss | 48 avd_AssetRetirementObligationsGainLoss
Amortization of discounted liabilities | 324 avd_AssetRetirementObligationOther | 174 avd_AssetRetirementObligationOther | 818 avd_AssetRetirementObligationOther
Payments on existing obligations | (1,686)us-gaap_AssetRetirementObligationAccretionExpense | (7,890)us-gaap_AssetRetirementObligationAccretionExpense | (7,447)us-gaap_AssetRetirementObligationAccretionExpense
Ending Balance | $ 2,492 us-gaap_AssetRetirementObligationsNoncurrent | $ 3,886 us-gaap_AssetRetirementObligationsNoncurrent | $ 11,900 us-gaap_AssetRetirementObligationsNoncurrent

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- Definition Asset Retirement Obligation Liabilities Added From Acquisitions + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Asset Retirement Obligation, Other + References No definition available. + Details
Name: | avd_AssetRetirementObligationOther
Namespace Prefix: | avd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Asset Retirement Obligations Gain Loss + References No definition available. + Details
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Namespace Prefix: | avd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration

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- Definition Net Increase or Decrease in the asset retirement obligation during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration