Quarterly report pursuant to Section 13 or 15(d)

Capital Structure

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Capital Structure
6 Months Ended
Jun. 30, 2021
Federal Home Loan Banks [Abstract]  
Capital Structure
8. Capital Structure
As of June 30, 2021, the Company was authorized to issue 125,000,000 shares of common stock.
Follow-on
Offerings
On March 22, 2021, the Company completed an underwritten public offering of 11,500,000 shares of its common stock, including shares sold pursuant to the fully exercised overallotment option granted to the underwriters in connection with the offering, at a public offering price of $5.00 per share, resulting in net proceeds to the Company of approximately $53.8 million after underwriting discounts and commissions and offering expenses payable by the Company.
On May 27, 2020, the Company completed an underwritten public offering of 11,797,752 shares of its common stock and warrants to purchase an additional 8,848,314 shares of its common stock at an exercise price of $4.90 per share. The public offering price was $4.45 for one share of common stock and an accompanying warrant to purchase 0.75 shares of common stock, resulting in net proceeds to the Company of approximately $48.9 million after underwriting discounts and commissions and offering expenses payable by the Company. The Company completed a concurrent private placement to Pfizer Inc. (“Pfizer”) of 674,156 shares of common stock and an accompanying warrant to purchase an additional 505,617 shares of its common stock at an exercise price of $4.90 per share (the “Pfizer Warrant”) at a price of $4.45 for one share of common stock and an accompanying warrant to purchase 0.75 shares of common stock, resulting in net proceeds to the Company of approximately $3.0 million. Warrants to purchase 22,560 shares of common stock were exercised during the
six months ended June 30
,
2021
and warrants to purchase
5,850
shares of common stock were exercised during the year ended December 
31
,
2020
.
The Company issued warrants in its 2020, 2017 and 2016 offerings. These warrants contain a fundamental transaction provision that obligates the Company to cash settle the warrants under a limited set of conditions not entirely within the Company’s control. Due to this conditional obligation, the Company determined that the 2020 Warrants, the 2017 Warrants and the 2016 Warrants should be classified as liabilities in the Company’s consolidated balance sheet. At issuance, the Company determined the fair value of the 2020 Warrants, the 2017 Warrants and 2016 Warrants to be $31.4 million, $12.4 million and $18.6 million, respectively, and reclassified these balances from stockholders’ equity to warrant liability. The fair value of these warrants is
re-measured
at each reporting period
 
and changes in fair value are recognized in the consolidated statement of operations (see Note 4, “Fair Value Measurements”). Additionally, the Company allocated approximately $2.2 million, $0.9 million and $1.6 million of issuance costs to the 2020 Warrants, the 2017 Warrants and 2016 Warrants, respectively, based on the proportion of the proceeds allocated to the fair value of the warrants. The allocated issuance costs were expensed as other expense in the Company’s consolidated statement of operations.
The Pfizer Warrant does not contain the same fundamental transaction provision that obligates the Company to cash settle the warrants under a limited set of conditions not entirely within the Company’s control. Therefore, the Company determined that the Pfizer Warrant should be classified as equity in the Company’s consolidated balance sheet.
Voting
The holders of shares of common stock are entitled to one vote for each share of common stock held at all meetings of stockholders and written actions in lieu of meetings.
Dividends
The holders of shares of common stock are entitled to receive dividends, if and when declared by the board of directors. As of June 30, 2021, no dividends have been declared or paid on the Company’s common stock since inception.
Reserved for Future Issuance
The Company has reserved for future issuance the following number of shares of common stock as of June 30, 2021 and December 31, 2020:
 
    
June 30,
2021
    
December 31,
2020
 
Outstanding options to purchase common stock
     2,848,693        1,853,841  
Outstanding warrants to purchase common stock
     12,327,304        12,350,293  
For future issuance under the 2014 Plan
     128,632        41,079  
    
 
 
    
 
 
 
    
15,304,629
    
14,245,213