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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | AVALON HOLDINGS CORPORATION AND SUBSIDIARIES SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS FOR THE YEARS ENDED DECEMBER 31, 2021 AND 2020 (in thousands)
|  | Additions |  |  |  |  |  |  |
DESCRIPTION | Balance at Beginning of Year |  | Charged (Credited) to Costs and Expenses |  | Charged to Other Accounts | Deductions / (Recoveries) |  | Balance at End of Year |
Year ended December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for credit losses | $ | 265 |  | $ | 36 |  | $ | - |  |  | 36 | (1) | $ | 265 |
Deferred tax asset valuation allowance | $ | 2,269 |  | $ | 82 | (2) | $ | - |  |  | - |  | $ | 2,351 |
Year ended December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for credit losses | $ | 275 |  | $ | 40 |  | $ | - |  |  | 50 | (1) | $ | 265 |
Deferred tax asset valuation allowance | $ | 2,043 |  | $ | 226 | (2) | $ | - |  |  | - |  | $ | 2,269 |
(1) Accounts receivable written-off as uncollectible, net of recoveries. |  |  |  |  |  |  |  |  |  |  |  |  |
(2) Change in valuation allowance primarily for deferred tax assets when it is more likely than not that the deferred tax assets will not be realized. |

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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