XML 59 R60.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Subsequent event - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified |  |  | 0 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2014 | Mar. 25, 2013 | Oct. 01, 2014 Subsequent Event | Oct. 01, 2014 Subsequent Event
Subsequent Event [Line Items] |  |  |  |
Warrants exercised amount |  |  | $ 500 |
Warrants exercised shares |  |  | 6,155,000 |
Equity investment ownership position | 19.28% | 29.27% |  | 21.18%

X
- Definition Warrant Exercises + References No definition available. + Details
Name: | avd_WarrantExercises
Namespace Prefix: | avd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Warrants Exercised Shares + References No definition available. + Details
Name: | avd_WarrantsExercisedShares
Namespace Prefix: | avd_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration