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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
COSTS AND EXPENSES: |  |
Research and development | $ 6,835,229 | $ 9,465,666
General and administrative | 4,820,073 | 4,135,304
Impairment of goodwill | 1,675,462 | 0
Total costs and expenses | 13,330,764 | 13,600,970
LOSS FROM OPERATIONS | (13,330,764) | (13,600,970)
OTHER INCOME: |  |
Gain on revaluation of derivative warrants | 62,050 | 22,075
Interest income, net | 29,687 | 16,605
Total other income, net | 91,737 | 38,680
NET LOSS | (13,239,027) | (13,562,290)
DEEMED DIVIDEND ON PREFERRED STOCK | (2,241,795) | (1,448,945)
NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS | $ (15,480,822) | $ (15,011,235)
BASIC AND DILUTED NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS PER COMMON SHARE | $ (5.23) | $ (10.70)
SHARES USED IN COMPUTING BASIC AND DILUTED NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS PER COMMON SHARE | 2,961,972 | 1,403,132

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