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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2021
Stockholders' Equity Note [Abstract]  
Schedule of Number of Shares of Common Stock Reserved for Future Issuance

The Company has the following shares of common stock reserved for future issuance:

 

 

 

December 31,

 

 

 

2021

 

 

2020

 

Stock options available for future grant

 

 

1,961,338

 

 

 

1,739,621

 

Stock options issued and outstanding

 

 

3,875,317

 

 

 

3,706,945

 

Unvested restricted stock units

 

 

771,660

 

 

 

 

Common stock warrants issued and outstanding

 

 

220,890

 

 

 

226,191

 

Total common stock reserved

 

 

6,829,205

 

 

 

5,672,757

 

Schedule of Outstanding Warrants

The following provides a roll forward of outstanding warrants:

 

 

 

Number of
Warrants

 

 

Weighted
Average
Exercise
Price

 

 

Weighted
Average
Contractual
Term (Years)

 

Outstanding and exercisable warrants to purchase
   preferred shares as of December 31, 2020

 

 

226,191

 

 

$

11.3177

 

 

 

5.66

 

Issued

 

 

 

 

 

 

 

 

 

Exercised

 

 

(5,301

)

 

 

 

 

 

 

Outstanding and exercisable warrants to purchase
   common stock as of December 31, 2021

 

 

220,890

 

 

$

11.3177

 

 

 

4.66

 

Schedule of Outstanding Warrants to Purchase Shares of Common Stock

As of December 31, 2021, the Company's outstanding warrants to purchase shares of common stock consisted of the following:


Issuance Date

 

Number of
Shares of
Common
Stock Issuable

 

 

Exercise
Price

 

 

Classification

 

Expiration Date

September 15, 2020

 

 

101,610

 

 

$

11.3177

 

 

Equity

 

July 25, 2026

September 15, 2020

 

 

30,924

 

 

$

11.3177

 

 

Equity

 

August 21, 2026

September 15, 2020

 

 

77,312

 

 

$

11.3177

 

 

Equity

 

September 19, 2026

September 15, 2020

 

 

11,044

 

 

$

11.3177

 

 

Equity

 

September 26, 2026

 

 

 

220,890