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Consolidated Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Revenues:        
Total revenue $ 879,597 $ 692,929 $ 2,186,577 $ 2,090,541
Costs and expenses:        
Costs of research and development revenue 602,847 392,544 1,418,702 1,612,810
Research and development 743,585 1,901,548 3,917,245 5,918,888
General and administrative 1,383,433 1,692,837 4,753,162 4,994,458
Foreign currency exchange loss, net 13,205 30,002 23,578 76,080
Total costs and expenses 2,743,070 4,016,931 10,112,687 12,602,236
Loss from operations (1,863,473) (3,324,002) (7,926,110) (10,511,695)
Other income:        
Interest income 54,300 3,202 87,277 49,772
Other income 0 1,605,532 250,000 1,605,532
Total other income 54,300 1,608,734 337,277 1,655,304
Net loss $ (1,809,173) $ (1,715,268) $ (7,588,833) $ (8,856,391)
Basic and diluted net loss per common share (in dollars per share) $ (0.06) $ (0.06) $ (0.27) $ (0.32)
Basic and diluted weighted-average common shares outstanding (in shares) 28,391,894 28,079,157 28,302,332 27,754,597
Research and Development [Member]        
Revenues:        
Total revenue $ 835,480 $ 692,929 $ 1,983,636 $ 2,090,541
License [Member]        
Revenues:        
Total revenue $ 44,117 $ 0 $ 202,941 $ 0