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SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of selected quarterly financial information (unaudited) |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
|  | (In thousands, except per share amounts) |
Year Ended December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 537 |  |  | $ | 174 |  |  | $ | 163 |  |  | $ | 191 |
Operating expenses |  |  | 8,031 |  |  |  | 6,905 |  |  |  | 7,407 |  |  |  | 7,977 |
Net loss |  |  | (7,183 | ) |  |  | (6,405 | ) |  |  | (6,899 | ) |  |  | (7,429 | )
Basic and diluted net loss per share |  | $ | (0.05 | ) |  | $ | (0.04 | ) |  | $ | (0.04 | ) |  | $ | (0.05 | )
Year Ended December 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues(1) |  | $ | 749 |  |  | $ | 211 |  |  | $ | 5,108 |  |  | $ | 94 |
Operating expenses |  |  | 9,826 |  |  |  | 9,122 |  |  |  | 8,985 |  |  |  | 8,875 |
Net loss |  |  | (8,842 | ) |  |  | (8,637 | ) |  |  | (3,576 | ) |  |  | (8,482 | )
Basic and diluted net loss per share |  | $ | (0.06 | ) |  | $ | (0.05 | ) |  | $ | (0.02 | ) |  | $ | (0.05 | )
(1) | The third quarter of 2016 includes the full recognition of the $5,000,000 upfront payment from Janssen Pharmaceuticals as license fee revenue. See Note 4 on License Agreements.

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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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