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Note 8 - Long-term Incentive Plan (Detail) - Period and Predetermined Stock Price Needed for Vesting (USD $) | 12 Months Ended
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Dec. 31, 2011
Block One [Member] |
Begins Vesting | 12 mo. after Grant Dates
Ends Vesting | 48 mo. after Grant Dates
Predetermined Vesting Price | $ 3.43
Block Two [Member] |
Begins Vesting | 24 mo. after Grant Dates
Ends Vesting | 60 mo. after Grant Dates
Predetermined Vesting Price | $ 4.69
Block Three [Member] |
Begins Vesting | 36 mo. after Grant Dates
Ends Vesting | 72 mo. after Grant Dates
Predetermined Vesting Price | $ 6.43
Block Four [Member] |
Begins Vesting | 48 mo. after Grant Dates
Ends Vesting | 84 mo. after Grant Dates
Predetermined Vesting Price | $ 8.81
Block Five [Member] |
Begins Vesting | 60 mo. after Grant Dates
Ends Vesting | 96 mo. after Grant Dates
Predetermined Vesting Price | $ 12.07

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | awx_PredeterminedVestingPrice
Namespace Prefix: | awx_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Descriptions of stock options begins vesting. + References No definition available. + Details
Name: | awx_StockOptionsBeginsVestingPeriodDescription
Namespace Prefix: | awx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of stock options ends vesting. + References No definition available. + Details
Name: | awx_StockOptionsEndsVestingPeriodDescription
Namespace Prefix: | awx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration