Common Stock Warrant and Option Exercises and Employee Stock Purchases

6 Months Ended

Jun. 30, 2014

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Common Stock Warrant and Option Exercises and Employee Stock Purchases

(14) Common Stock Warrant and Option Exercises and Employee Stock Purchases

During the six months ended June 30, 2014, the Company issued 3,364,033 shares of common stock in connection with warrant and stock option exercises and purchases under the Company’s 1995 Employee Stock Purchase Plan (the “ESPP”) resulting in total proceeds to the Company of $6,780,000.

During the six months ended June 30, 2013, the Company issued 3,574 shares of common stock in connection with employee stock purchases under the ESPP, which resulted in total proceeds to the Company of $2,000. During this period, there were no warrant or option exercises.