Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Operating expenses:    
Research and development $ 3,190,302 $ 2,598,985
General and administrative 2,208,800 1,669,807
Warrant inducement expense 0 690,839
Total operating expenses 5,399,102 4,959,631
Loss from operations (5,399,102) (4,959,631)
Other income (expense):    
Interest income 5,087 12,815
Interest expense (44,064) (572,985)
Change in fair value of derivative liabilities 7,000 338,000
Change in fair value of warrant liabilities 0 1,578,800
Total other income (expense), net (31,977) 1,356,630
Loss before income taxes (5,431,079) (3,603,001)
Income tax benefit 0 0
Net loss $ (5,431,079) $ (3,603,001)
Net loss per common share, basic (in dollars per share) $ (0.03) $ (0.09)
Net loss per common share, diluted (in dollars per share) $ (0.03) $ (0.09)
Weighted-average common shares, basic and diluted (in shares) 211,280,867 41,162,296