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Common Stock Warrants	6 Months Ended
Common Stock Warrants	Jun. 30, 2013
Warrants and Rights Note Disclosure [Abstract]
Common Stock Warrants	8. Common Stock Warrants The Company issues warrants to purchase common shares of the Company either as compensation for services or as additional incentive for investors who may purchase common stock. The value of warrants issued for compensation is accounted for as a non-cash expense to the Company at the fair value of the warrants issued. In June 2007, in conjunction with the initial public offering, the Company issued 100,000 warrants to purchase 100,000 shares of its common stock at an exercise price of $7.70 to the underwriters as part of the initial public offering which expired in June 2012. There were no warrants granted during the three and six months ended June 30, 2012 and 2013.