The minimum percentage of fair market value for incentive stock options.

No definition available.

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- Definition

The minimum percentage of fair market value for non-qualified stock options.

+ References

No definition available.

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- Definition

The number of years after options vested that the predetermined vesting price must be reached.

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

+ References

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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- Definition

Net number of share options (or share units) granted during the period.

+ References

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Number of share options (or share units) exercised during the current period.

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Note 13 - Long-term Incentive Plan (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	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, Expirations in Period (in shares)			190,000	420,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)				24,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)			54,000	244,000	688,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 64,000
Share-based Payment Arrangement, Expense			5,000	$ 6,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 7,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 5 months 1 day
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 (Year)			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 (Year)			5 years
Avalon Holdings Corporation 2009 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			5 years
Number Of Years After Options Vested, Stock Price Reach Predetermined Vesting Price (Year)			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, Expirations in Period (in shares)	190,000	420,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)			90,000	24,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)			36,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)			54,000
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 (Year)			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 (Year)			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 (in shares)							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 (in shares)						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 (in shares)						1,300,000