Note 13 - Stockholders' Equity
12 Months Ended
Dec. 31, 2021
Notes to Financial Statements  
Stockholders' Equity Note Disclosure [Text Block]

13. Stockholders Equity

 

Common Stock

 

2021 Underwritten Public Offering

 

On January 22, 2021, the Company completed an underwritten public offering in which the Company issued and sold 14,500,000 shares of its common stock to the underwriter at a price of $1.7625 per share. On January 27, 2021, the underwriters exercised their option in full and purchased an additional 2,175,000 shares at a price of $1.7625 per share. The total net proceeds from this offering of an aggregate 16,675,000 shares were approximately $28.9 million.

 

2021 Registered Direct Offering

 

On November 17, 2021, the Company completed a registered direct offering in which the Company issued and sold 17,500,000 shares of its common stock at a price of $0.80 per share and warrants exercisable for an aggregate of 17,500,000 shares of its common stock at a price of $1.00 per share. The total net proceeds from this offering were approximately $13.9 million. The November 2021 issued shares were valued at approximately $13.1 million based on the closing stock price of $0.7491 per share on November 15, 2021. The common stock and warrants were issued in a unit structure; therefore, in accordance with ASC Topic 815, the aggregate gross proceeds of $14.0 million were allocated to the two securities using the relative fair value method, resulting in the common stock and warrants being allocated values of $8.4 million and $5.6 million, respectively.

 

2020 Registered Direct Offerings

 

On July 23, 2020, the Company completed a registered direct offering in which it issued and sold 9,433,962 shares of its common stock at a price of $1.06 per share. The total net proceeds from this offering were approximately $10.0 million, after deducting estimated expenses payable by the Company of $49,000. No underwriter or placement agent participated in the offering.

 

On December 11, 2020, the Company completed a registered direct offering in which it issued and sold 8,333,333 shares of its common stock at a price of $1.20 per share. The total net proceeds from this offering were approximately $9.9 million, after deducting estimated expenses payable by the Company of $51,000. No underwriter or placement agent participated in the offering.

 

ATM Agreement

 

On June 21, 2016, the Company entered into a Controlled Equity OfferingSM Sales Agreement, or the ATM Agreement, with Cantor Fitzgerald & Co., or Cantor, as agent, pursuant to which the Company may offer and sell, from time to time through Cantor, shares of the Company’s common stock, or the Common Stock having an aggregate offering price of up to $40.0 million, or the Shares. On May 9, 2019, the Company increased the aggregate offering price of shares of the Company’s common stock which may be offered and sold under the ATM Agreement by $40.0 million, for a total of $80.0 million, or the Shares. The offering of Shares pursuant to the ATM Agreement will terminate upon the earlier of (a) the sale of all of the Shares subject to the ATM Agreement or (b) the termination of the ATM Agreement by Cantor or the Company, as permitted therein. The Company will pay Cantor a commission rate in the low single digits on the aggregate gross proceeds from each sale of Shares and have agreed to provide Cantor with customary indemnification and contribution rights.

 

During the year ended December 31, 2021, the Company issued and sold approximately 3.0 million shares of common stock pursuant to the ATM Agreement, and received net proceeds of approximately $7.5 million, after deducting fees and expenses. During the year ended December 31, 2020, the Company issued and sold 876,800 shares of common stock pursuant to the ATM Agreement, for which the Company received net proceeds of approximately $1.4 million.

 

As of December 31, 2021, the Company had the ability to offer and sell shares of the Company’s common stock having an aggregate offering price of up to $36.1 million under the ATM Agreement.

 

Stock Plans

 

2011 Equity Incentive Plan

 

In January 2011, the Board of Directors adopted, and the Company’s stockholders approved, the 2011 Equity Incentive Plan, or 2011 EIP. The initial aggregate number of shares of the Company’s common stock that were issuable pursuant to stock awards under the 2011 EIP was approximately 1.9 million shares. The number of shares of common stock reserved for issuance under the 2011 EIP automatically increased on January 1 of each year, starting on January 1, 2012 and continuing through January 1, 2020, by 4% of the total number of shares of the Company’s common stock outstanding on December 31 of the preceding calendar year, or such lesser number of shares of common stock as determined by the Board of Directors.

 

As of June 16, 2020, no more awards may be granted under the 2011 Equity Incentive Plan, or the 2011 EIP, although all outstanding stock options and other stock awards previously granted under the 2011 EIP will continue to remain subject to the terms of the 2011 EIP.

 

Amended 2020 Plan

 

On June 16, 2020, at the 2020 Annual Meeting of Stockholders of the Company, the Company’s stockholders, upon the recommendation of the Company’s Board of Directors, approved the Company’s 2020 Equity Incentive Plan, or the 2020 EIP.

 

The initial aggregate number of shares of the Company’s common stock issuable pursuant to stock awards under the 2020 EIP was 5,500,000 shares. In addition, the share reserve will be increased by the number of returning shares, if any, as such shares become available from time to time under the 2011 EIP, for an additional number of shares not to exceed 14,892,170 shares. The term of any option granted under the 2020 EIP is determined on the date of grant but shall not be longer than 10 years. The Company issues new shares for settlement of vested restricted stock units and exercises of stock options. The Company does not have a policy of purchasing its shares relating to its stock-based programs.

 

On June 17, 2021, at the 2021 Annual Meeting of Stockholders of the Company, upon the recommendation of the Company’s Board of Directors, the Company’s stockholders approved an amendment and restatement of the Company’s 2020 Equity Incentive Plan, or 2020 Plan, or as amended and restated, the Amended 2020 Plan, to increase the number of authorized shares reserved for issuance thereunder by 4,300,000 shares, subject to adjustment for certain changes in the Company’s capitalization. The aggregate number of shares of the Company’s common stock that may be issued under the Amended 2020 Plan will not exceed the sum of: (i) 4,300,000 shares approved in connection with the adoption of the Amended 2020 Plan, (ii) 5,500,000 shares approved in connection with the original adoption of the 2020 Plan, and (iii) certain shares subject to outstanding awards granted under the 2011 Equity Incentive Plan that may become available for issuance under the 2020 Plan and Amended 2020 Plan, as such shares become available from time to time.

 

Amended and Restated 2011 Employee Stock Purchase Plan

 

Additionally, on June 16, 2020, the Company’s stockholders, upon the recommendation of the Company’s Board of Directors, approved the Amended and Restated 2011 Employee Stock Purchase Plan, or the Amended ESPP, which increased the aggregate number of shares of the Company’s common stock reserved for issuance under the 2011 Employee Stock Purchase Plan, or ESPP, to 4,900,000 shares, subject to adjustment for certain changes in the Company’s capitalization, and removed the “evergreen” provision from the ESPP.

 

In the year ended December 31, 2021, there were 297,959 shares issued under the Amended ESPP. The weighted average fair value of shares issued under the Amended ESPP in 2021 and 2020 was $1.01 and $1.09 per share, respectively. As of December 31, 2021, there were 4,456,364 shares available for future grant under the Amended ESPP.