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Schedule II Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2018
Schedule II-Valuation and Qualifying Accounts |
Schedule II-Valuation and Qualifying Accounts | Schedule II—Valuation and Qualifying Accounts Axcelis Technologies, Inc. (In thousands)
|  | Balance at |  | Charged to |  |  |  |  | Balance at |
|  | Beginning of |  | Costs and |  |  |  |  | End of |
|  | Period |  | Expenses |  | Deductions |  | Period |
Year ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts and returns |  | $ | — |  | $ | — |  | $ | — |  | $ | — |
Deferred tax valuation allowance |  |  | 7,136 |  |  | (441) |  |  | (140) |  |  | 6,835 |
Year ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts and returns |  | $ | 77 |  | $ | — |  | $ | 77 |  | $ | — |
Deferred tax valuation allowance |  |  | 122,966 |  |  | (115,831) |  |  | (1) |  |  | 7,136 |
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts and returns |  | $ | — |  | $ | 106 |  | $ | 29 |  | $ | 77 |
Deferred tax valuation allowance |  |  | 132,263 |  |  | (7,765) |  |  | 1,532 |  |  | 122,966 |

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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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- References No definition available. + Details
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