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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
|  | Balance at beginning of period |  |  | Additions |  |  | Deduction |  |  | Balance at end of period |
Year ended December 31, 2016 Allowance for doubtful accounts |  | $ | 25 |  |  | $ | — |  |  | $ | 25 |  |  | $ | — |
Year ended December 31, 2015 Allowance for doubtful accounts |  | $ | 25 |  |  | $ | — |  |  | $ | — |  |  | $ | 25 |
Year ended December 31, 2014 Allowance for doubtful accounts |  | $ | — |  |  | $ | 25 |  |  | $ | — |  |  | $ | 25 |

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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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