Note 5 - Stockholders' Equity | 9 Months Ended |
Sep. 30, 2013 |
Stockholders' Equity Note [Abstract] | ' |
Stockholders' Equity Note Disclosure [Text Block] | ' |
5. Stockholders’ Equity |
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Increase in Authorized Shares of Common Stock |
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At our annual meeting of stockholders held on June 10, 2013, our stockholders approved an amendment to our certificate of incorporation to increase our authorized shares of common stock from 40,000,000 shares to 75,000,000 shares. The amendment to our certificate of incorporation was filed with the Delaware Secretary of State on August 1, 2013. In addition to the 21,666,610 shares of common stock outstanding at September 30, 2013, we have reserved the following shares of our common stock for future issuance: |
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Common Stock Purchase Warrants | | | 8,292,226 | | | | | |
Equity Incentive Plans | | | 1,197,529 | | | | | |
Series A Convertible Preferred Stock | | | 1,050,667 | | | | | |
Total | | | 10,540,422 | | | | | |
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Common Stock Transactions |
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During January and May 2013, we issued an aggregate of 1,766,667 shares and 1,166,666 shares, respectively, of our common stock pursuant to the exercise of Series B Warrants, resulting in total proceeds of $1,060,000 and $583,333, respectively (see ”Stock Purchase Warrants” below). |
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Stock Options |
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The Company maintains a stock option plan that provides the Board of Directors broad discretion in creating equity incentives for employees, officers, directors and consultants. The following table presents a summary of stock option transactions during the nine months ended September 30, 2013: |
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| | Number of Shares | | | Weighted Average | |
Exercise Price |
Outstanding at December 31, 2012 | | | 1,069,141 | | | $ | 4.5 | |
Granted | | | -- | | | | -- | |
Exercised | | | -- | | | | -- | |
Forfeited or expired | | | (78,429 | ) | | | 4.86 | |
Outstanding at September 30, 2013 | | | 990,712 | | | $ | 4.47 | |
Exercisable at September 30, 2013 | | | 679,036 | | | $ | 6.14 | |
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During the three month and nine month periods ended September 30, 2013, we recorded share-based compensation expense related to stock options of $33,348 and $116,600, as compared to $84,742 and $247,318 for the three month and nine month periods ended September 30, 2012, respectively. Share-based compensation expense is recognized on a straight-line basis over the requisite service period for the award and is allocated to research and development expense or general and administrative expense based upon the related employee classification. As of September 30, 2013, there was $135,418 of unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted average period of 1.7 years. |
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Stock Purchase Warrants |
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We have issued stock purchase warrants in connection with financing transactions and also in exchange for services from consultants and others. The following table presents a summary of stock purchase warrant transactions during the nine months ended September 30, 2013: |
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| | Number of Shares | | | Weighted Average | |
Exercise Price |
Outstanding at December 31, 2012 | | | 11,225,559 | | | $ | 2.06 | |
Issued | | | -- | | | | -- | |
Exercised | | | (2,933,333 | ) | | | 0.56 | |
Forfeited or expired | | | -- | | | | -- | |
Outstanding at September 30, 2013 | | | 8,292,226 | | | $ | 2.53 | |
Exercisable at September 30, 2013 | | | 8,292,226 | | | $ | 2.53 | |
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Effective January 17, 2013, we reduced the exercise price of our then-outstanding Series B Common Stock Purchase Warrants from $0.75 to $0.60 per share. In consideration for the reduction of the exercise price, the holders of the Series B Warrants immediately exercised 1,766,667 of the Series B Warrants for cash, resulting in total proceeds to the Company of $1,060,000. We also extended the expiration date of the unexercised Series B Warrants (1,166,667 shares in the aggregate) from March 21, 2013 to May 21, 2013. We recorded general and administrative expense of $218,551 associated with these warrant modifications, all of which was recognized during the three month period ended March 31, 2013. |
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Effective May 14, 2013, we reduced the exercise price of the remaining Series B Common Stock Purchase Warrants from $0.60 to $0.50 per share. In consideration for the reduction of the exercise price, the holders of the Series B Warrants immediately exercised all 1,166,666 of the remaining Series B Warrants for cash, resulting in total proceeds to the Company of $583,333. We recorded general and administrative expense of $19,617 associated with this warrant modification, all of which was recognized during the three month period ended June 30, 2013. |