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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Income Statement [Abstract] |  |  |  |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest | $ (6,352) | $ (3,532) | $ (28,150) | $ (22,017)
Costs and expenses: |  |  |  |
Research and development | 5,740 | 7,025 | 18,762 | 21,463
General and administrative | 2,895 | 3,542 | 7,869 | 12,744
Total operating expenses | 8,635 | 10,567 | 26,631 | 34,207
Operating loss | (8,635) | (10,567) | (26,631) | (34,207)
Other income (expense): |  |  |  |
Change in fair value of warrants potentially settleable in cash | 2,134 | 6,735 | (981) | 13,174
Interest income (expense), net | (158) | (297) | (607) | (925)
Other income (expense) | 307 | 597 | 69 | (59)
Total non-operating income (expense), net | 2,283 | 7,035 | (1,519) | 12,190
Loss from discontinued operations, including $8,071 impairment charge from classification as held for sale for three and nine months ended September 30, 2015 | (11,674) | (2,641) | (16,074) | (6,633)
Net loss | $ (18,026) | $ (6,173) | $ (44,224) | $ (28,650)
Net loss per common share: |  |  |  |
Basic and diluted net loss per share, continuing operations (in dollars per share) | $ (0.04) | $ (0.03) | $ (0.18) | $ (0.19)
Basic and diluted net loss per share, discontinued operations (in dollars per share) | (0.07) | (0.02) | (0.11) | (0.06)
Basic net loss per share (in dollars per share) | $ (110.00) | $ (0.05) | $ (0.29) | $ (0.25)
Weighted-average common shares outstanding: basic and diluted | 161,857,522 | 119,038,656 | 153,000,857 | 117,767,791

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