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Note 4 - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Mar. 07, 2018 | Mar. 31, 2018
Restricted Cash and Cash Equivalents Withdrawal Amount |  | $ 1.5
Boardman Tennis Center [Member] |  |
Payments to Acquire Businesses, Gross | $ 1.3 |

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- Definition Amount of withdrawal from restricted cash and cash equivalents. + References No definition available. + Details
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Namespace Prefix: | awx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=awx_BoardmanTennisCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |