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Summary of Long Term Debt (Parenthetical) (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Available borrowings capacity under credit agreement		$ 104,853,000
Senior secured credit facility, maturity date	Jun. 30, 2022
Maximum
Debt Instrument [Line Items]
Available borrowings capacity under credit agreement	$ 250,000,000
Accordion feature	$ 100,000,000
Consolidated funded debt ratio	325.00%
Minimum
Debt Instrument [Line Items]
Consolidated fixed charge covenant ratio	125.00%

X

- Definition

Consolidated funded debt ratio.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Line of credit consolidated fixed charge covenant ratio.

+ References

No definition available.

+ Details

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Namespace Prefix:	avd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line Of Credit Facility Maturity Date

+ References

No definition available.

+ Details

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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

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X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Balance Type:	credit
Period Type:	instant

X

- Definition

Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Details

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