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Net Loss Per Share - Basic and diluted net loss per share (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Numerator                
Net loss $ (2,848,216) $ (2,524,602) $ (3,199,673) $ (1,006,354) $ (2,309,490) $ (441,590) $ (8,572,491) $ (3,757,434)
Denominator                
Weighted-average common shares outstanding, basic 8,099,103     6,871,554     7,466,443 6,113,400
Weighted-average common shares outstanding, diluted 8,099,103     6,871,554     7,466,443 6,113,400
Net loss per share, basic $ (0.35)     $ (0.15)     $ (1.15) $ (0.61)
Net loss per share, diluted $ (0.35)     $ (0.15)     $ (1.15) $ (0.61)