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Note 11 - Long-term Incentive Plan (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022 | Apr. 25, 2019 | 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 | $ 1,000 | $ 1,000 | $ 1,000 | $ 2,000 |  |  |
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
The 2019 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 |
Avalon Holdings Corporation 2009 Long Term Incentive Plan And 2019 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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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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