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Note 4 - Credit Facility (Details) (Huntington National Bank [Member], USD $)
12 Months Ended
Dec. 31, 2014
Jul. 22, 2014
Jun. 30, 2014
Dec. 31, 2013
Note 4 - Credit Facility (Details) [Line Items]        
Line of Credit Facility, Maximum Borrowing Capacity   $ 5,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity $ 1,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity  
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage      
Long-term Line of Credit 3,800,000us-gaap_LineOfCredit     0us-gaap_LineOfCredit
Line of Credit Facility, Remaining Borrowing Capacity $ 1,200,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity      
Long-term Debt, Weighted Average Interest Rate 2.86%us-gaap_LongtermDebtWeightedAverageInterestRate      
Debt Instrument, Interest Rate, Stated Percentage 2.85%us-gaap_DebtInstrumentInterestRateStatedPercentage      
London Interbank Offered Rate (LIBOR) [Member]        
Note 4 - Credit Facility (Details) [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 2.70%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LineOfCreditFacilityAxis
= awx_HuntingtonNationalBankMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember