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Stockholders' Equity | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Stockholders' Equity | Stockholders’ Equity On August 6, 2018, the Company completed a private placement of 12,062,000 shares of its common stock and warrants (the “2018 Warrants”) to purchase an additional 4,221,700 shares of its common stock, subject to adjustment for stock splits, reverse stock splits, stock dividends and similar transactions, to certain accredited investors for gross proceeds of $19.7 million in cash. Each warrant had an initial exercise price of $2.52 per share, subject to adjustment for stock splits, reverse stock splits, stock dividends and similar transactions. On March 28, 2019, the 2018 Warrants were exercised at an exercise price of $2.52 per share, for aggregate cash proceeds to the Company of approximately $10.6 million. In connection with the exercise of the 2018 Warrants, on March 28, 2019, the Company issued additional warrants to purchase 2,500,000 shares of common stock (the “2019 Warrants”) to the accredited investors. Each 2019 Warrant has an initial exercise price of $7.00 per share, subject to adjustment for stock splits, reverse stock splits, stock dividends and similar transactions, will be exercisable at any time on or after September 28, 2019, and will expire on June 30, 2022. The 2019 Warrants may be exercisable on a cashless exercise basis if, and only if, the shares of common stock underlying such warrants cannot be immediately resold pursuant to an effective registration statement or Rule 144 of the Securities Act of 1933, as amended, without volume or manner of sale restrictions. During the fourth quarter of 2019, the Company received $6.9 million in net cash proceeds from the exercise of 1,255,129 of the Company’s common stock purchase warrants issued in 2015. The Company assessed the terms of the warrants under ASC 815, Derivatives and Hedging. Pursuant to this guidance, the Company has determined that the warrants do not require liability accounting and has classified the warrants as equity. Preferred Stock The Company has a total of 2,000,000 shares of preferred stock authorized for issuance at a par value of $0.001 per share, 150,000 of which have been designated Series D Preferred Stock and 39,500 of which have been designated Series E Preferred Stock. On August 9, 2019, the Company completed a private placement of 10,000 shares of Series E Preferred Stock for an aggregate purchase price of $10.0 million in accordance with the terms and provisions of a Securities Purchase Agreement, dated August 9, 2019, by and among the Company and certain accredited investors. Each share of Series E Preferred Stock entitles the holder thereof to receive, when, as and if declared by the Company out of assets legally available therefor, cumulative cash dividends at an annual rate of 9.00% payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, beginning on October 1, 2019. If dividends are not declared and paid in any quarter, or if such dividends are declared but holders of the Series E Preferred Stock elect not to receive them in cash, the quarterly dividend will be deemed to accrue and will be added to the Series E Base Amount. The Series E Preferred Stock has no voting rights unless otherwise required by law. The Series E Preferred Stock is perpetual and has no maturity date. However, the Company may, at its option, redeem shares of the Series E Preferred Stock, in whole or in part, on or after July 1, 2022, at a price equal to 110% of the Series E Base Amount plus (without duplication) any accrued and unpaid dividends. The “Series E Base Amount” means $1,000 per share, plus any accrued but unpaid dividends, whether or not declared by the Company’s board of directors, subject to appropriate adjustment in the event of any stock dividend, stock split, combination or other similar recapitalization with respect to the Series E Preferred Stock. In the event of a liquidation, dissolution or winding up of the Company, the holders of the Series E Preferred Stock will be entitled to receive, after satisfaction of liabilities to creditors and subject to the rights of holders of any senior securities, but before any distribution of assets is made to holders of common stock or any other junior securities, the Series E Base Amount plus (without duplication) any accrued and unpaid dividends. On March 6, 2020, the Company entered into a Securities Purchase Agreement with an accredited investor pursuant to which, among other things, the Company issued and sold to the investor, in a private placement transaction, an aggregate of 25,000 shares of the Company’s Series E Preferred Stock, for a purchase price of $1,000 per share of Series E Preferred Stock, resulting in gross proceeds to the Company of $25.0 million. There were no dividends declared and $2.9 million and $0.4 million of dividends were accrued as of December 31, 2020, and 2019, respectively. Rights Agreement On January 22, 2018, the Company entered into a Rights Agreement with Computershare Trust Company, N.A., a federally chartered trust company, as rights agent (as subsequently amended, the “Rights Agreement”) and issued a dividend of one preferred share purchase right (a “Right”) to each of the stockholders of record of each share of common stock outstanding on February 2, 2018. Each Right entitled the registered holder to purchase from the Company one one-thousandth of a share of Series D Preferred Stock, par value $0.001 per share (the “Preferred Shares”), of the Company, at a price of $10.00 per one one-thousandth of a Preferred Share represented by a Right (the “Purchase Price”), subject to adjustment. The description and terms of the Rights are set forth in the Rights Agreement. The Rights were not exercisable until the Distribution Date (as defined in the Rights Agreement). The Rights expired on January 22, 2021. In connection with the issuance of the 2019 Warrants, on March 28, 2019, the Company entered into an Amendment No. 3 to the Rights Agreement, dated January 22, 2018, as amended by that certain Amendment No. 1 to Rights Agreement, dated August 6, 2018, and as amended by that certain Amendment No. 2 to Rights Agreement, dated December 4, 2018, between the Company and Computershare Trust Company, N.A., as rights agent, for the purpose of modifying the definition of “Acquiring Person” under the Rights Agreement to permit each of the Investors to remain a Grandfathered Stockholder (as defined in the Rights Agreement) and not be deemed an “Acquiring Person” under the Rights Agreement in connection with the Investors’ purchase of the 2019 Warrants. The Investors will remain Grandfathered Stockholders under the terms of the Rights Agreement as long as they do not acquire, after the date of the Third Amendment to Rights Agreement, beneficial ownership of Company securities (other than as a result of any adjustment provision or the accrual of interest under any outstanding convertible notes) equal to more than 0.50% of the then-outstanding common stock. The Rights expired on January 22, 2021. Common Shares Reserved for Future Issuance The Company had reserved shares of common stock for possible future issuance as of December 31, 2020 and 2019 as follows:
| December 31,
| 2020 |  | 2019
Common stock warrants outstanding | 2,500,000 |  |  | 2,838,454 |
Stock options outstanding | 8,479,979 |  |  | 9,044,304 |
Restricted stock units outstanding | 417,105 |  |  | 400,315 |
Shares available for issuance pursuant to Convertible Notes | 15,879,948 |  |  | 40,649,225 |
Shares available for future grants of awards under the 2018 Omnibus Incentive Compensation Plan | 2,849,488 |  |  | 2,488,221 |
Shares available under the 2000 Employee Stock Purchase Plan | 391,201 |  |  | 622,476 |
Total shares of common stock reserved for issuance | 30,517,721 |  |  | 56,042,995 |

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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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