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Note 11 - Long-Term Incentive Plan (Details Textual) - USD ($)
xbrli-pure in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Oct. 06, 2009
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 760,000   760,000   760,000  
Avalon Holdings Corporation 2009 Long Term Incentive Plan Member            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 760,000   760,000      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 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%      
Allocated Share-based Compensation Expense, Total $ 1,000 $ 2,000 $ 3,000 $ 7,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total $ 26,000   $ 26,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     5 years 335 days      
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