Stockholders' Equity

6 Months Ended

Jun. 30, 2012

Stockholders' Equity Note [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

7.   Stockholders’ Equity

During the six months ended June 30, 2012, the Company issued 334,851 shares of common stock, in connection with the exercise of stock options, for proceeds of approximately $88,000. The Company also issued 1,673,776 shares of common stock in connection with the exercise of warrants, for proceeds of approximately $1.9 million.