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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Schedule II - Valuation and Qualifying Accounts |
Schedule II - Valuation and Qualifying Accounts | Schedule II — Valuation and Qualifying Accounts
|  |  |  | Additions |  |  |  |  |
|  |  |  | Charged |  |  |  |  |  |  |
|  | Balance at |  | (Credited) |  | Charged to |  |  |  | Balance at |
|  | Beginning |  | to Costs and |  | Other |  |  |  | End of |
Deducted from asset accounts: |  | of Period |  | Expenses |  | Accounts |  | Deductions |  | Period |
|  | (in thousands) |
Year ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 286 |  | $ | 99 |  | $ | — |  | $ | (115 | ) | $ | 270 |
Valuation allowance in net deferred tax assets |  | 106,793 |  | (51,410 | ) | 45,301 |  | — |  | 100,684 |
|  | $ | 107,079 |  | $ | (51,311 | ) | $ | 45,301 |  | $ | (115 | ) | $ | 100,954 |
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 206 |  | $ | 171 |  | $ | — |  | $ | (91 | ) | $ | 286 |
Valuation allowance in net deferred tax assets |  | 56,273 |  | 50,520 |  | — |  | — |  | 106,793 |
|  | $ | 56,479 |  | $ | 50,691 |  | $ | — |  | $ | (91 | ) | $ | 107,079 |
Year ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 731 |  | $ | 43 |  | $ | — |  | $ | (568 | ) | $ | 206 |
Valuation allowance in net deferred tax assets |  | 34,909 |  | 23,655 |  | (2,291 | ) | — |  | 56,273 |
|  | $ | 35,640 |  | $ | 23,698 |  | $ | (2,291 | ) | $ | (568 | ) | $ | 56,479 |

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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 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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