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Note 10 - Shareholders' Equity (Details) | 12 Months Ended
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Dec. 31, 2014
Note 10 - Shareholders' Equity (Details) [Line Items] |
Number Of Class A Common Stock Convertible With Each Class Common Stock (in Shares) | 1 awx_NumberOfClassACommonStockConvertibleWithEachClassBCommonStock
Common Class A [Member] |
Note 10 - Shareholders' Equity (Details) [Line Items] |
Number of Votes Each Common Share Entitled | 1 awx_NumberOfVotesEachCommonShareEntitled / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Class B [Member] |
Note 10 - Shareholders' Equity (Details) [Line Items] |
Number of Votes Each Common Share Entitled | 10 awx_NumberOfVotesEachCommonShareEntitled / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember

X
- Details
Name: | awx_Note10ShareholdersEquityDetailsLineItems
Namespace Prefix: | awx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares convertible with each class of common stock. + References No definition available. + Details
Name: | awx_NumberOfClassACommonStockConvertibleWithEachClassBCommonStock
Namespace Prefix: | awx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of votes each common share is entitled. + References No definition available. + Details
Name: | awx_NumberOfVotesEachCommonShareEntitled
Namespace Prefix: | awx_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |