Stockholders' Equity

6 Months Ended

Jun. 30, 2013

Stockholders' Equity Note [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

8.  Stockholders’ Equity

During the six months ended June 30, 2013, the Company issued 291,666 shares of common stock, in connection with the exercise of stock options, for proceeds of approximately $231,000.