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Potentially Dilutive Securities (Tables)
9 Months Ended
Sep. 30, 2021
Potentially Dilutive Securities  
Potentially Dilutive Securities Excluded From Computation of Diluted Net Loss Per Common Share

The following outstanding potentially dilutive securities have been excluded from the computations of diluted net loss per common share:

As of September 30,

2021

2020

Options to purchase common stock

4,144,864

3,528,642

Warrants to purchase common stock

31,238

76,238

Convertible debt

510,986

-

4,687,088

3,604,880