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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data (Unaudited) | The following table contains quarterly financial information for 2019 and 2018. The Company believes that the following information reflects all normal recurring adjustments necessary for a fair statement of the information for the periods presented. The operating results for any quarter are not necessarily indicative of results for any future period.
|  | 2019 |
|  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |  |  | Total |
|  | (In thousands, except per share data) |
Total operating expenses |  | $ | 11,691 |  |  | $ | 19,169 |  |  | $ | 25,161 |  |  | $ | 29,436 |  |  | $ | 85,457 |
Loss from operations |  |  | (11,691 | ) |  |  | (19,169 | ) |  |  | (25,161 | ) |  |  | (29,436 | ) |  |  | (85,457 | )
Net loss |  |  | (11,069 | ) |  |  | (18,332 | ) |  |  | (24,448 | ) |  |  | (28,890 | ) |  |  | (82,739 | )
Net loss per share—basic and diluted |  | $ | (0.38 | ) |  | $ | (0.51 | ) |  | $ | (0.68 | ) |  | $ | (0.79 | ) |  | $ | (2.41 | )
|  | 2018 |
|  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |  |  | Total |
|  | (In thousands, except per share data) |
Total operating expenses |  | $ | 10,200 |  |  | $ | 14,113 |  |  | $ | 9,032 |  |  | $ | 6,360 |  |  | $ | 39,705 |
Loss from operations |  |  | (10,200 | ) |  |  | (14,113 | ) |  |  | (9,032 | ) |  |  | (6,360 | ) |  |  | (39,705 | )
Net loss |  |  | (9,859 | ) |  |  | (13,591 | ) |  |  | (8,407 | ) |  |  | (5,757 | ) |  |  | (37,614 | )
Net loss per share—basic and diluted |  | $ | (0.46 | ) |  | $ | (0.48 | ) |  | $ | (0.30 | ) |  | $ | (0.21 | ) |  | $ | (1.42 | )

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306 + Details
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