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Consolidated Statements of Operations - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Grant and collaboration revenue $ 1,175,896 $ 963,203
Operating expenses:    
Research and development 1,910,715 1,878,652
General and administrative 1,637,674 1,647,268
Total operating expenses 3,548,389 3,525,920
Loss from operations (2,372,493) (2,562,717)
Other income (expense):    
Interest income 6,359 5,213
Interest expense (4,495) (2,590)
Total other income (expense) 1,864 2,623
Net loss $ (2,370,629) $ (2,560,094)
Basic and diluted:    
Loss per common share (in dollars per share) $ (39.25) $ (15,610.33)
Weighted average shares outstanding (in shares) 60,402 164