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Note 14 - Certain Relationships and Related Transactions (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Management and Accredited Investors [Member] | Investment in Subsidiary [Member] |
Note 14 - Certain Relationships and Related Transactions (Details) [Line Items] |
Related Party Transaction, Amounts of Transaction | $ 1.0 us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionAxis = awx_InvestmentInSubsidiaryMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = awx_ManagementAndAccreditedInvestorsMember
Salt Water Injection Wells [Member] |
Note 14 - Certain Relationships and Related Transactions (Details) [Line Items] |
Area of Land | 5.2 us-gaap_AreaOfLand / us-gaap_MajorPropertyClassAxis = awx_SaltWaterInjectionWellsMember
AWMS Holdings, LLC [Member] |
Note 14 - Certain Relationships and Related Transactions (Details) [Line Items] |
Equity Method Investment, Ownership Percentage | 47.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = awx_AWMSHoldingsLLCMember

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- 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
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- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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