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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
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, 20 1 7 AND 20 1 6 (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, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 235 |  |  | $ | 6 |  |  | $ | - |  |  | $ | 4 | (1) |  | $ | 237 |
Deferred tax asset valuation allowance |  | $ | 1,453 |  |  | $ | (140 | ) (2) |  | $ | - |  |  | $ | - |  |  | $ | 1,313 |
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 235 |  |  | $ | 115 |  |  | $ | - |  |  | $ | 115 | (1) |  | $ | 235 |
Deferred tax asset valuation allowance |  | $ | 1,651 |  |  | $ | (198 | ) (2) |  | $ | - |  |  | $ | - |  |  | $ | 1,453 |
( 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 any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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