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Selected Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data (Unaudited) | Selected Quarterly Financial Data (Unaudited) The following data contain certain corrections of errors identified in previously reported amounts. See Note 2, Summary of Significant Accounting Policies. The table below sets forth certain unaudited statements of comprehensive loss data, and net loss per common share data, for each quarter of 2018 and 2017: (in thousands, except per share data)
| Quarter Ended
| March 31 |  | June 30 |  | September 30 |  | December 31
|  |  | (Unaudited) |  |
2018 |  |  |  |  |  |  |  |  |  |  |
Revenues | $ | 25,374 |  |  | $ | 13,798 |  |  | $ | 6,966 |  |  | $ | 17,071 |
Loss from operations | $ | (37,713 | ) |  | $ | (30,272 | ) |  | $ | (22,927 | ) |  | $ | (12,367 | )
Net loss | $ | (41,822 | ) |  | $ | (34,549 | ) |  | $ | (27,396 | ) |  | $ | (16,781 | )
Net loss per common share, basic and diluted | $ | (0.40 | ) |  | $ | (0.33 | ) |  | $ | (0.26 | ) |  | $ | (0.16 | )
Shares used in computing net loss per common share, basic and diluted | 105,668 |  |  | 105,848 |  |  | 105,881 |  |  | 105,920 |
2017 |  |  |  |  |  |  |
Revenues | $ | 17,962 |  |  | $ | 12,087 |  |  | $ | 27,674 |  |  | $ | 33,966 |
Loss from operations | $ | (39,512 | ) |  | $ | (33,491 | ) |  | $ | (28,605 | ) |  | $ | (29,016 | )
Net loss | $ | (31,918 | ) |  | $ | (34,657 | ) |  | $ | (29,809 | ) |  | $ | (26,609 | )
Net loss per common share, basic and diluted | $ | (0.31 | ) |  | $ | (0.33 | ) |  | $ | (0.28 | ) |  | $ | (0.25 | )
Shares used in computing net loss per common share, basic and diluted | 104,461 |  |  | 105,300 |  |  | 105,582 |  |  | 105,588 |
For all periods presented, the weighted average number of shares outstanding are the same for both basic and diluted net loss per common share. For these periods, shares associated with convertible debt, stock options and restricted stock units are not included in the weighted average number of shares of common stock outstanding because they are antidilutive. The impact of the error corrections are presented on a “Previously reported,” “Adjustments,” and “As adjusted” basis in the following quarterly financial data for 2017 and 2018 (in thousands, except per share data):
| Three Months Ended March 31, 2018 |  | Three Months Ended March 31, 2017
| Previously reported |  | Adjustments |  | As adjusted |  | Previously reported |  | Adjustments |  | As adjusted
Revenues | $ | 25,207 |  |  | 167 |  |  | $ | 25,374 |  |  | $ | 18,293 |  |  | (331 | ) |  | $ | 17,962 |
Loss from operations | $ | (37,966 | ) |  | 253 |  |  | $ | (37,713 | ) |  | $ | (42,485 | ) |  | 2,973 |  |  | $ | (39,512 | )
Net loss | $ | (42,075 | ) |  | 253 |  |  | $ | (41,822 | ) |  | $ | (34,891 | ) |  | 2,973 |  |  | $ | (31,918 | )
Net loss per common share, basic and diluted | $ | (0.40 | ) |  | — |  |  | $ | (0.40 | ) |  | $ | (0.33 | ) |  | 0.02 |  |  | $ | (0.31 | )
Shares used in computing net loss per common share, basic and diluted | 105,668 |  |  |  |  | 105,668 |  |  | 104,461 |  |  |  |  | 104,461 |
| Three Months Ended June 30, 2018 |  | Three Months Ended June 30, 2017
| Previously reported |  | Adjustments |  | As adjusted |  | Previously reported |  | Adjustments |  | As adjusted
Revenues: | $ | 13,753 |  |  | 45 |  |  | $ | 13,798 |  |  | $ | 12,053 |  |  | 34 |  |  | $ | 12,087 |
Loss from operations | $ | (30,429 | ) |  | 157 |  |  | $ | (30,272 | ) |  | $ | (33,893 | ) |  | 402 |  |  | $ | (33,491 | )
Net loss | $ | (34,706 | ) |  | 157 |  |  | $ | (34,549 | ) |  | $ | (35,059 | ) |  | 402 |  |  | $ | (34,657 | )
Net loss per common share, basic and diluted | $ | (0.33 | ) |  | — |  |  | $ | (0.33 | ) |  | $ | (0.33 | ) |  | — |  |  | $ | (0.33 | )
Shares used in computing net loss per common share, basic and diluted | 105,848 |  |  |  |  | 105,848 |  |  | 105,300 |  |  |  |  | 105,300 |
| Three Months Ended September 30, 2018 |  | Three Months Ended September 30, 2017
| Previously reported |  | Adjustment |  | As adjusted |  | Previously reported |  | Adjustment |  | As adjusted
Revenues: | $ | 6,856 |  |  | 110 |  |  | $ | 6,966 |  |  | $ | 26,942 |  |  | 732 |  |  | $ | 27,674 |
Loss from operations | $ | (23,043 | ) |  | 116 |  |  | $ | (22,927 | ) |  | $ | (29,518 | ) |  | 913 |  |  | $ | (28,605 | )
Net loss | $ | (27,512 | ) |  | 116 |  |  | $ | (27,396 | ) |  | $ | (30,722 | ) |  | 913 |  |  | $ | (29,809 | )
Net loss per common share, basic and diluted | $ | (0.26 | ) |  | — |  |  | $ | (0.26 | ) |  | $ | (0.29 | ) |  | 0.01 |  |  | $ | (0.28 | )
Shares used in computing net loss per common share, basic and diluted | 105,881 |  |  |  |  | 105,881 |  |  | 105,582 |  |  |  |  | 105,582 |
|  |  |  |  |  |  | Three Months Ended December 31, 2017
|  |  |  |  |  |  | Previously reported |  | Adjustment |  | As adjusted
Revenues: |  |  |  |  |  |  | $ | 33,047 |  |  | 919 |  |  | $ | 33,966 |
Loss from operations |  |  |  |  |  |  | $ | (30,785 | ) |  | 1,769 |  |  | $ | (29,016 | )
Net loss |  |  |  |  |  |  | $ | (28,378 | ) |  | 1,769 |  |  | $ | (26,609 | )
Net loss per common share, basic and diluted |  |  |  |  |  |  | $ | (0.27 | ) |  | 0.02 |  |  | $ | (0.25 | )
Shares used in computing net loss per common share, basic and diluted |  |  |  |  |  |  | 105,588 |  |  |  |  | 105,588 |

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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