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Stockholders' Equity | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Stockholders' Equity | 3. Stockholders’ Equity Common Stock During the six months ended June 30, 2018, there were no activities that affected common stock. August 2017 Private Placement On August 2, 2017, we entered into a Securities Purchase Agreement with accredited investors as part of a private placement pursuant to which we issued a total of 9,750,000 shares of common stock at $1.00 per share, and warrants, for an aggregate purchase price of $9.75 million in gross proceeds (see Note 1 for additional details). Preferred Stock We have one class of preferred stock outstanding. There were no activities that affected preferred stock during the six months ended June 30, 2018. Conversion of Preferred Stock Issued to Common Stock The following table summarizes the amounts as of June 30, 2018.
|  | Shares of Preferred Stock Not Exchanged as of June 30, 2018 |  |  | Conversion Ratio |  |  | Shares of Common Stock after Conversion of all Outstanding Shares of Preferred Stock Not yet Exchanged at June 30, 2018 |
Series B Preferred stock |  |  | 83 |  |  |  | 132.07 |  |  |  | 10,962 |
Warrants As of both June 30, 2018 and December 31, 2017, there were 11,163,677 warrants to purchase common stock outstanding, respectively. During 2017, we agreed to issue the 2017 Warrants to investors in the August 2017 private placement to purchase up to a total of approximately 3,250,000 shares of common stock at an exercise price of $2.00 per share. The 2017 Warrants will become exercisable 12 months from the date of issuance and will expire three years from the date of issuance. If the 2017 Warrants are fully exercised, we will receive approximately $6.5 million in cash.

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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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