Condensed Statements of Operations and Comprehensive Loss - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Operating expenses: | ||||
| Research and development | $ 3,943,420 | $ (1,785,645) | $ 8,215,079 | $ 5,815,580 |
| General and administrative | 2,564,508 | 1,565,992 | 8,728,714 | 8,669,455 |
| Total operating expenses, net | 6,507,928 | (219,653) | 16,943,793 | 14,485,035 |
| Income (loss) from operations | (6,507,928) | 219,653 | (16,943,793) | (14,485,035) |
| Other income (expense): | ||||
| Interest income | 57,848 | 42,431 | 156,945 | 127,560 |
| Interest expense | (472,052) | (1,038,014) | (1,330,923) | (5,593,751) |
| Loss on extinguishment of convertible note payable | 0 | 0 | (1,049,166) | 0 |
| Change in fair value of derivative liability and extinguishment of derivative liability | 229,000 | 0 | 881,000 | 0 |
| Change in fair value of warrant liabilities | (2,528,100) | 0 | 141,700 | 0 |
| Total other income (expense), net | (2,713,304) | (995,583) | (1,200,444) | (5,466,191) |
| Loss before income taxes | (9,221,232) | (775,930) | (18,144,237) | (19,951,226) |
| Benefit from income taxes | 0 | 0 | 0 | 0 |
| Net loss | $ (9,221,232) | $ (775,930) | $ (18,144,237) | $ (19,951,226) |
| Net loss per common share, basic and diluted (in usd per share) | $ (0.26) | $ (0.03) | $ (0.56) | $ (0.82) |
| Weighted-average common shares, basic and diluted (in shares) | 35,883,953 | 25,818,495 | 32,401,624 | 24,269,266 |