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Stockholders' Equity | 9 Months Ended
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Sep. 30, 2018
Stockholders' Equity Note [Abstract] |
Stockholders' Equity | Stockholders’ Equity The following is a summary of the Company's authorized and issued common and preferred stock as of September 30, 2018 and December 31, 2017:
|  |  |  |  | Outstanding as of
| Authorized |  | Issued |  | September 30, 2018 |  | December 31, 2017
Common Stock, par value $0.001 per share | 600,000,000 |  |  | 94,472,389 |  |  | 94,472,389 |  |  | 90,357,644 |
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 an At-the-Market Equity Offering Sales Agreement (the “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 will act as sales agent. Under the Sales Agreement, the Company will set the parameters for the sale of shares, including the number of shares to be issued, the time period during which sales are 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 provides that the Placement Agent will be 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 has no obligation to sell any shares under the Sales Agreement, and may at any time suspend solicitation and offers under the Sales Agreement. During the nine months ended September 30, 2018, the Company sold a total of 2,652,530 shares of common stock under the Sales Agreement. The sales were made at a weighted average price of $5.14 per share resulting in aggregate net proceeds of $13.4 million. The Company may sell up to an additional $86.4 million in shares of its common stock under the Sales Agreement. The registration statement that registered with the SEC the shares that may be sold under the Sales Agreement expires on June 8, 2021. In June 2016, the Company entered into an At-the-Market Equity Offering Sales Agreement (the “Prior Sales Agreement”) with the same placement agent. The registration statement that registered with the SEC the shares sold under the Prior Sales Agreement expired on June 5, 2018, and no further sales will be made under the Prior Sales Agreement. The Company sold an aggregate of 3,911,104 shares of common stock under the Prior Sales Agreement resulting in aggregate net proceeds of $32.1 million. During the period beginning January 1 and ending June 5, 2018, the Company sold a total of 314,950 shares of common stock under the Prior Sales Agreement. The sales were made at a weighted average price of $5.07 per share resulting in aggregate net proceeds of $1.6 million. During the nine months ended September 30, 2017, the Company sold a total of 2,937,406 shares of common stock under the Prior Sales Agreement. The sales were made at a weighted average price of $8.41 per share resulting in aggregate net proceeds of $24.2 million. On July 25, 2017, the Company closed an underwritten public offering of 12,500,000 shares of common stock at a public offering price of $6.00 per share. The net proceeds to the Company, after deducting the underwriters' discounts and commissions and other offering expenses, were $70.1 million. Warrants During the three and nine months ended September 30, 2018, warrants to purchase 284,091 shares of the Company's common stock which were issued in connection with an underwritten public offering of common stock and warrants in March 2013 were exercised, with net proceeds to the Company of $902,000. No common stock warrants were exercised during the three and nine months ended September 30, 2017. As of September 30, 2018, no common stock warrants were outstanding. Previously, the Company accounted for the common stock warrants issued in March 2013 under the authoritative guidance on accounting for derivative financial instruments indexed to, and potentially settled in, a company’s own stock, on the understanding that in compliance with applicable securities laws, the registered warrants required the issuance of registered securities upon exercise and did not sufficiently preclude an implied right to net cash settlement. The Company classified registered warrants on the condensed consolidated balance sheet as a current liability which was revalued at each balance sheet date subsequent to the initial issuance. Changes in the fair market value of the warrants were reflected in the condensed consolidated statement of operations as change in fair value of common stock warrants. Stock Options The Company has a stock-based incentive plan, the 2016 Omnibus Incentive Plan (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 approved by the Company's stockholders on May 13, 2016. 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 6,000,000 shares, provided that commencing with the first business day of each calendar year beginning January 1, 2018, such maximum number of shares shall be increased by 2,000,000 shares of common stock unless the Board 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, 2018, the maximum number of shares to be issued was increased by 2,000,000. At September 30, 2018, there were 8,000,000 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 September 30, 2018, the Company had 2,993,654 shares of common stock available for future grant under the 2016 Incentive Plan, 1,534,883 shares underlying outstanding but unvested restricted stock units and options outstanding to purchase 3,104,397 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 September 30, 2018, the Company had 176,330 shares underlying outstanding but unvested restricted stock units and options outstanding to purchase 5,840,878 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.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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