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Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]  
Schedule of Potentially Dilutive Securities not included in the Calculation of Diluted Net Loss per Share
The following table presents the weighted-average number of common share equivalents, calculated using the treasury stock method, not included in the calculation of diluted net loss per share due to the anti-dilutive effect of the securities:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
Common stock options2,415,979 2,487,135 2,262,174 2,398,467 
Common stock warrants9,092,807 9,826,743 9,451,913 10,412,385 
Total11,508,786 12,313,878 11,714,087 12,810,852