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Note 11 - Long-term Incentive Plan - Period and Predetermined Stock Price Needed for Vesting (Details) | 6 Months Ended
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Jun. 30, 2023 $ / shares
Share-Based Payment Arrangement, Tranche One [Member] |
Begins Vesting | 12 months after Grant Dates
Ends Vesting | 48 months after Grant Dates
Predetermined Vesting Price (in dollars per share) | $ 3.43
Share-Based Payment Arrangement, Tranche Two [Member] |
Begins Vesting | 24 months after Grant Dates
Ends Vesting | 60 months after Grant Dates
Predetermined Vesting Price (in dollars per share) | $ 4.69
Share-Based Payment Arrangement, Tranche Three [Member] |
Begins Vesting | 36 months after Grant Dates
Ends Vesting | 72 months after Grant Dates
Predetermined Vesting Price (in dollars per share) | $ 6.43
Share-Based Compensation Award Tranche Four [Member] |
Begins Vesting | 48 months after Grant Dates
Ends Vesting | 84 months after Grant Dates
Predetermined Vesting Price (in dollars per share) | $ 8.81
Share-Based Compensation Award Tranche Five [Member] |
Begins Vesting | 60 months after Grant Dates
Ends Vesting | 96 months after Grant Dates
Predetermined Vesting Price (in dollars per share) | $ 12.07

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- Definition PredeterminedVestingPrice + References No definition available. + Details
Name: | awx_PredeterminedVestingPrice
Namespace Prefix: | awx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Stock options begins vesting period description. + References No definition available. + Details
Name: | awx_StockOptionsBeginsVestingPeriodDescription
Namespace Prefix: | awx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Stock options ends vesting period description. + References No definition available. + Details
Name: | awx_StockOptionsEndsVestingPeriodDescription
Namespace Prefix: | awx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_VestingAxis=awx_SharebasedCompensationAwardTrancheFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_VestingAxis=awx_SharebasedCompensationAwardTrancheFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |