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Net Loss Per Share (Tables)
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Potential Dilutive Outstanding Securities Excluded From Diluted Net Loss Per Common Share
The following potentially dilutive outstanding securities were excluded from diluted net loss per common share for the period indicated because of their anti-dilutive effect:
Potentially dilutive securitiesThree Months Ended
September 30,
 20202019
Stock options2,783,591 1,824,975 
Warrants1,908,643 3,750,833 
Total4,692,234 5,575,808