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Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Allowance for doubtful accounts at December 31, 2014 and 2013 (in Dollars) | $ 168 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 168 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common Class A [Member] |  |
Par Value (in Dollars per share) | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Stock, Shares Authorized | 10,500,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 10,500,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Stock, Shares Issued | 3,191,100 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 3,191,100 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Stock, Outstanding | 3,191,100 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 3,191,100 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Stock, Votes per Share (in Dollars per share) | $ 1 awx_CommonStockVotesPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 1 awx_CommonStockVotesPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Class B [Member] |  |
Par Value (in Dollars per share) | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common Stock, Shares Authorized | 1,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 1,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common Stock, Shares Issued | 612,231 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 612,231 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common Stock, Outstanding | 612,231 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 612,231 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common Stock, Votes per Share (in Dollars per share) | $ 10 awx_CommonStockVotesPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 10 awx_CommonStockVotesPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember

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