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Note 11 - Long-term Incentive Plan (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Oct. 06, 2009
Minimum Percentage of Fair Market Value for Non-qualified Stock Option Price |  |  | 100.00% |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  |  | (0) |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number | 0 |  | 0 |  | 54,000 |
Share-Based Payment Arrangement, Expense | $ 0 | $ 1,000 | $ 1,000 | $ 3,000 |  |
Ten Percent Shareholders [Member] |  |  |  |  |  |
Minimum Percentage of Fair Market Value for Incentive Stock Option Price |  |  | 110.00% |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period |  |  | 10 years |  |  |
Other Employees [Member] |  |  |  |  |  |
Minimum Percentage of Fair Market Value for Incentive Stock Option Price |  |  | 100.00% |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period |  |  | 5 years |  |  |
Avalon Holdings Corporation 2009 Long Term Incentive Plan [Member] |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period |  |  | 10 years |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  |  | 5 years |  |  |
Number Of Years After Options Vested, Stock Price Reach Predetermined Vesting Price |  |  | 3 years |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  |  | 0.00% |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  |  | 36,000 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number | 18,000 |  | 18,000 |  |  |
Avalon Holdings Corporation 2009 Long Term Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period |  |  | 1 year |  |  |
Avalon Holdings Corporation 2009 Long Term Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Minimum [Member] |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period |  |  | 6 months |  |  |
Avalon Holdings Corporation 2009 Long Term Incentive Plan [Member] | Common Class A [Member] |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized |  |  |  |  |  | 1,300,000

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