CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Operating expenses:
Research and development	$ 3,816,618	$ 2,832,695
General and administrative	2,826,995	2,805,775
Total operating expenses	6,643,613	5,638,470
Loss from operations	(6,643,613)	(5,638,470)
Other income (expense):
Change in fair value of warrant liabilities	31,000	(9,000)
Interest income	126,969	328,545
Net loss	$ (6,485,644)	$ (5,318,925)
Net loss per share, basic and diluted	$ (0.14)	$ (0.12)
Weighted average number of common shares outstanding	46,084,383	45,465,754

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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