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Net Loss per Share - Computation of Basic and Diluted Net Income (Loss) per Share Attributable to Common Stockholders (Detail) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Numerator:    
Net loss applicable to common stockholders $ (231,667) $ (163,752)
Denominator:    
Weighted average common shares outstanding, basic 15,396,703 15,328,870
Weighted average common shares outstanding, diluted 15,396,703 15,328,870
Net loss per share:    
Basic $ (0.02) $ (0.01)
Diluted $ (0.02) $ (0.01)
Anti-dilutive securities excluded from diluted net loss per share:    
Anti-dilutive securities excluded from diluted net loss per share 3,457,695 3,921,048
Stock options [Member]    
Anti-dilutive securities excluded from diluted net loss per share:    
Anti-dilutive securities excluded from diluted net loss per share 2,936,635 2,187,483
Warrants [Member]    
Anti-dilutive securities excluded from diluted net loss per share:    
Anti-dilutive securities excluded from diluted net loss per share 521,060 1,733,565