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Consolidated Statements of Operations (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Operating expenses:    
Research and development $ 2,916,378 $ 1,534,467
General and administrative 1,743,510 1,393,808
Depreciation 24,447 27,020
Loss from operations 4,684,335 2,955,295
Other income:    
Interest income (40,416) (34,100)
Loss from operations before income tax benefit (4,643,919) (2,921,195)
Income tax benefit 362,380
Net loss $ (4,643,919) $ (2,558,815)
Per share information:    
Net loss per share of common stock, basic and diluted (in dollars per share) $ (0.06) $ (0.07)
Weighted average shares outstanding, basic and diluted (in dollars per share) $ 83,420,184 $ 34,507,496