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Selected Unaudited Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |
Summary of Unaudited Quarterly Financial Data | The following table summarizes the Company’s unaudited quarterly financial data for the last two years (in thousands, except per share data):
|  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 1,750 |  |  | $ | 1,750 |  |  | $ | 1,750 |  |  | $ | 9,750 |
Total operating expenses |  | $ | 20,523 |  |  | $ | 30,910 |  |  | $ | 24,999 |  |  | $ | 27,277 |
Net loss |  | $ | (17,670 | ) |  | $ | (28,090 | ) |  | $ | (22,352 | ) |  | $ | (16,598 | )
Net loss per share — basic and diluted |  | $ | (0.41 | ) |  | $ | (0.64 | ) |  | $ | (0.51 | ) |  | $ | (0.38 | )
Weighted average number of shares, basic and diluted |  |  | 43,508,592 |  |  |  | 43,797,718 |  |  |  | 43,939,281 |  |  |  | 44,056,407 |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 1,250 |  |  | $ | 1,250 |  |  | $ | 4,291 |  |  | $ | 1,562 |
Total operating expenses |  | $ | 14,581 |  |  | $ | 17,149 |  |  | $ | 16,436 |  |  | $ | 15,046 |
Net loss |  | $ | (12,954 | ) |  | $ | (13,533 | ) |  | $ | (10,812 | ) |  | $ | (12,295 | )
Net loss per share — basic and diluted |  | $ | (1.37 | ) |  | $ | (0.32 | ) |  | $ | (0.25 | ) |  | $ | (0.28 | )
Weighted average number of shares, basic and diluted |  |  | 9,488,352 |  |  |  | 42,533,641 |  |  |  | 42,838,098 |  |  |  | 43,163,412 |

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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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