Stockholders' Equity

12 Months Ended

Dec. 31, 2014

Stockholders' Equity [Abstract]

Stockholders Equity Note Disclosure [Text Block]

10. Stockholders’ Equity

Preferred Stock

There were no issuances of preferred stock during the three and six month periods ended June 30, 2015 and 2014.

Common Stock

The Company is authorized to issue 110,000,000 shares of common stock, $.001 par value per share. As of June 30, 2015, there were 82,481,792 shares of common stock outstanding.

Employee Stock Option Exercises

Shares of common stock issued as a result of stock option exercises during the three and six month periods ended June 30, 2015 were 607,869 and 825,029, respectively, and the Company realized gross proceeds of approximately $544,400 and $670,500, respectively, from the exercise of such stock options. Shares of common stock issued as a result of stock option exercises during the three and six month periods ended June 30, 2014 was 75,000, respectively, and the Company realized gross proceeds of approximately $34,000, respectively, from the exercise of such stock options. See Note 11 for additional information regarding stock option plans.