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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2022
Equity [Abstract]  
Schedule of Common Stock Reserved for Issuance

The Company is required to reserve and keep available out of its authorized but unissued shares of common stock a number of shares sufficient to effect the conversion of all outstanding options granted and available for grant under the incentive plans, shares reserved for issuance under the employee stock purchase plan and issued warrants.

 

 

 

March 31,

2022

 

 

December 31,

2021

 

Shares reserved under Series A warrant

 

 

7,771,951

 

 

 

7,790,879

 

Shares reserved under Series B warrant

 

 

212,477

 

 

 

2,524,732

 

Shares reserved for future option grants under equity plans

 

 

1,452,859

 

 

 

1,207,827

 

Outstanding stock options under equity incentive plans

 

 

5,466,822

 

 

 

4,937,189

 

Pre-funded warrants for common stock

 

 

925,925

 

 

 

 

Outstanding warrants

 

 

1,839

 

 

 

727,122

 

Shares reserved under the 2015 employee stock purchase plan

 

 

17,500

 

 

 

17,500

 

Total common stock reserved for issuance

 

 

15,849,373

 

 

 

17,205,249