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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenues    
Research and development $ 1,747,934 $ 5,201,786
Operating expenses    
Selling, general and administrative 3,056,546 2,869,869
Research and development 3,007,827 6,360,490
Patent expenses 218,472 240,597
Total operating expenses 6,282,845 9,470,956
Operating loss (4,534,911) (4,269,170)
Interest expense (3,748,818) (3,608,916)
Loss from change in fair value of warrant liability (3,303,114) (626,209)
Other income, net 2,235 4,419
Loss before income taxes (11,584,608) (8,499,876)
Current Income Tax Expense (Benefit) 2,352  
Benefit/(provision) for income taxes   (115,070)
Net and comprehensive loss $ (11,582,256) $ (8,614,946)
Loss per share: basic and diluted $ (0.15) $ (0.11)
Weighted average shares outstanding: basic and diluted 79,039,000 78,777,144