Stockholders’ Equity

The following is a summary of the Company's authorized and issued common and preferred stock as of March 31, 2020 and December 31, 2019:



			Outstanding as of
	Authorized	Issued	March 31, 2020	December 31, 2019
Common Stock, par value $0.001 per share	600,000,000	145,915,100	145,915,100	101,361,034
Series C Preferred Stock, par value $0.001 per share	1,091	1,091	23	23

Common Stock

In May 2018, the Company entered into a Sales Agreement with an outside placement agent (the “Placement Agent”) to sell shares of its common stock with aggregate gross proceeds of up to $100.0 million, from time to time, through an “at-the-market” equity offering program under which the Placement Agent would act as sales agent. During the first quarter of 2020, the Company and the Placement Agent entered into a first and second amendment to the Sales Agreement to increase the amount of common stock that may be sold under the Sales Agreement from $100.0 million to $250.0 million. Under the Sales Agreement, the Company set the parameters for the sale of shares, including the number of shares to be issued, the time period during which sales were requested to be made, limitation on the number of shares that may be sold in any one trading day and any minimum price below which sales may not be made. The Sales Agreement provided that the Placement Agent was entitled to compensation for its services in an amount equal to up to 3.0% of the gross proceeds from the sales of shares sold through the Placement Agent under the Sales Agreement. The Company had no obligation to sell any shares under the Sales Agreement, and could at any time suspend solicitation and offers under the Sales Agreement.

During the three months ended March 31, 2020, the Company sold 43,148,952 shares of its common stock, under the amended Sales Agreement. The sales were made at a weighted average price of $4.92 per share, resulting in aggregate net proceeds of $208.2 million. Following these sales, there was no remaining capacity under this Sales Agreement.

As described in Note 18 below, subsequent to March 31, 2020, the Company and the Placement Agent entered into

a new Sales Agreement to sell shares of its common stock with aggregate gross proceeds of up to $150.0 million.

Stock Options and Restricted Stock Units

The Company has a stock-based incentive plan, the 2016 Omnibus Incentive Plan (as amended to date, the "2016 Incentive Plan"), pursuant to which the Company may grant stock options, restricted stock awards, restricted stock units and other stock-based awards or short-term cash incentive awards to employees, directors and consultants.

The 2016 Incentive Plan was originally approved by the Company's stockholders on May 13, 2016, and an amendment to the plan to increase the number of shares available for issuance was approved by the stockholders on May 8, 2019. The maximum number of shares of the Company’s common stock available for issuance over the term of the 2016 Incentive Plan may not exceed 18,000,000 shares, provided that commencing with the first business day of each calendar year beginning January 1, 2020, such maximum number of shares shall be increased by 2,000,000 shares of common stock unless the Company's Board of Directors determines, prior to January 1 for any such calendar year, to increase such maximum amount by a fewer number of shares or not to increase the maximum amount at all for such year. On January 1, 2020, the maximum number of shares to be issued increased by 2,000,000. At March 31, 2020, there were 18,000,000 shares of common stock reserved for issuance upon exercise of incentive awards granted and to be granted at future dates under the 2016 Incentive Plan. At March 31, 2020, the Company had 7,536,221 shares of common stock available for future grant under the 2016 Incentive Plan, 2,667,710 shares underlying outstanding but unvested restricted stock units and options outstanding to purchase 5,631,777 shares of common stock under the 2016 Incentive Plan. The awards granted and available for future grant under the 2016 Incentive Plan generally vest over three years and have a maximum contractual term of ten years. The 2016 Incentive Plan terminates by its terms on March 9, 2026.

The Amended and Restated 2007 Omnibus Incentive Plan (the "2007 Incentive Plan") was adopted on March 31, 2007 and terminated by its terms on March 31, 2017. At March 31, 2020, the Company had options outstanding to purchase 3,984,209 shares of common stock under the 2007 Incentive Plan. The awards granted under the 2007 Incentive Plan generally vest over three years and have a maximum contractual term of ten years.