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Quarterly Concolidated Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Consolidated Financial Data (Unaudited) |
Summary of quarterly consolidated financial data (unaudited) |
|  | Quarter Ended |
|  |  | March 31, |  |  | June 30, |  |  | September 30, |  |  | December 31, |
Year ended December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 41,927 |  | $ | 30,469 |  | $ | 45,627 |  | $ | 39,125 |
Loss from operations |  | $ | (12,141) |  | $ | (15,385) |  | $ | (4,136) |  | $ | (5,778) |
Net loss |  | $ | (9,154) |  | $ | (14,809) |  | $ | (2,759) |  | $ | (4,544) |
Basic loss per share attributable to common stock |  | $ | (0.42) |  | $ | (0.68) |  | $ | (0.13) |  | $ | (0.21) |
Diluted loss per share attributable to common stock |  | $ | (0.42) |  | $ | (0.68) |  | $ | (0.13) |  | $ | (0.21) |
Year ended December 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 47,055 |  | $ | 28,086 |  | $ | 28,122 |  | $ | 30,067 |
Loss from operations |  | $ | (10,631) |  | $ | (13,266) |  | $ | (14,257) |  | $ | (11,282) |
Net loss |  | $ | (8,600) |  | $ | (11,589) |  | $ | (12,416) |  | $ | (7,187) |
Basic loss per share attributable to common stock |  | $ | (0.40) |  | $ | (0.54) |  | $ | (0.57) |  | $ | (0.33) |
Diluted loss per share attributable to common stock |  | $ | (0.40) |  | $ | (0.54) |  | $ | (0.57) |  | $ | (0.33) |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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