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Note 10 - Certain Relationships and Related Transactions (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Salt Water Injection Wells [Member]  
Note 10 - Certain Relationships and Related Transactions (Details) [Line Items]  
Area of Land 5.2us-gaap_AreaOfLand
/ us-gaap_MajorPropertyClassAxis
= awx_SaltWaterInjectionWellsMember
AWMS Holdings, LLC [Member]  
Note 10 - Certain Relationships and Related Transactions (Details) [Line Items]  
Equity Method Investment, Ownership Percentage 47.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= awx_AWMSHoldingsLLCMember
Investment in Subsidiary [Member] | Management and Accredited Investors [Member]  
Note 10 - Certain Relationships and Related Transactions (Details) [Line Items]  
Related Party Transaction, Amounts of Transaction $ 1.0us-gaap_RelatedPartyTransactionAmountsOfTransaction
/ us-gaap_RelatedPartyTransactionAxis
= awx_InvestmentInSubsidiaryMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= awx_ManagementAndAccreditedInvestorsMember