Note 5

COMMON STOCK WARRANTS

No warrants were exercised during the three and six months ended June 30, 2013.

In May 2013, unexercised warrants for the purchase of250,000 shares of the Company’s stock expired. These warrants had been issued in 2006 in conjunction with and as compensation for activities related to a licensing agreement and under a Finder’s Agreement and permitted the holder to purchase the underlying common shares at $4.31 per share. The exercise of these warrants was conditioned on an event that occurred in January 2007 and, accordingly, the Company recorded a charge based on the warrants’ fair value determined at January 2007.

In March 2013, unexercised warrants for the purchase of 1,286,764 shares of the Company’s stock expired. These warrants had been issued in March 2010 in conjunction with a 2010 sale of equities and permitted the holders to purchase the underlying common shares at $2.79 each or elect a net share settlement and were exercisable in whole at any time, or in part from time to time, during the period commencing six months after the date of issuance and ending three years from the date of issuance. Of the 2,345,000 warrants issued in 2010, warrants for the purchase of 1,058,236 shares had been exercised in previous periods.

In February 2013, unexercised warrants for the purchase of 486,766 shares of the Company’s stock expired. These warrants had been issued in February 2006 in conjunction with a 2006 sale of equities and were exercisable in whole at any time, or in part from time to time, for cash or in a net share settlement, for seven years from the date of issuance. Of the 716,666 warrants issued in 2006, warrants for the purchase of 229,900 shares had been exercised in previous periods.

In February 2012, a warrant holder exercised the right to purchase 57,000 shares of the common stock of the Company, with an exercise price of $3.30 per share, pursuant to a cashless exercise whereby the Company, in a net share settlement, issued 17,148 shares of its common stock to the warrant holder based on the excess of the market price over the exercise price on the date of exercise.