XML 77 R63.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Product Acquisitions - Additional Information (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) Business | Dec. 31, 2014 USD ($)
Business Acquisition [Line Items] |  |  |
Number of business acquisitions | Business |  | 2 |
Acquisitions of intangible assets | $ 224 | $ 36,667 |
Fair value increase (decrease) | (22) | 65 | $ (32)
Product acquisition and licensing agreements obligation, Other Liability | 815 |  |
Operating expenses |  |  |
Business Acquisition [Line Items] |  |  |
Fair value increase (decrease) | $ (22) | $ 65 | $ (32)
Product Rights |  |  |
Business Acquisition [Line Items] |  |  |
Expected useful life | 25 years |  |
Customer Lists |  |  |
Business Acquisition [Line Items] |  |  |
Expected useful life | 10 years |  |
Trademarks |  |  |
Business Acquisition [Line Items] |  |  |
Expected useful life | 25 years |  |

X
- Definition Business Acquisition Purchase Price Allocation Other Liabilities Assumed + References No definition available. + Details
Name: | avd_BusinessAcquisitionPurchasePriceAllocationOtherLiabilitiesAssumed
Namespace Prefix: | avd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number Of Business Acquisitions + References No definition available. + Details
Name: | avd_NumberOfBusinessAcquisitions
Namespace Prefix: | avd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of addition (reduction) to the amount at which a liability could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
Name: | us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OperatingExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=avd_ProductRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CustomerListsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_TrademarksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |