In conjunction with a private placement in October 2010 (the “2010 Private Placement”), the Company issued warrants to Ladenburg, the placement agent for the 2010 Private Placement. The warrants entitle Ladenburg to purchase up to a total of 1,044,584 shares of common stock for $0.25 per share. The warrants expire October 28, 2015. The warrants are exercisable, at the option of the holder, at any time prior to their expiration. The fair value of warrants issued to placement agents was calculated utilizing the lattice method. The warrants issued to Ladenburg contain provisions that make them redeemable for cash by the holder of the warrant under certain circumstances that are not within the control of the Company. Accordingly, the fair market value of the warrants as of the date of issuance has been classified as liabilities. The fair value of the 2010 Private Placement warrants as of March 31, 2013 was $67,599.

In conjunction with a private placement in 2012 (the “2012 Private Placement”), the Company issued warrants to Ladenburg in March 2012. The warrants entitle Ladenburg to purchase up to a total of 86,323 shares of common stock for $0.35 per share and expire March 27, 2017. The Company also issued warrants to Ladenburg in May 2012 in connection with the additional 702,872 shares of common stock issued in the March Private Placement. These warrants entitle Ladenburg to purchase 29,700 shares of common stock at $0.35 per share and expire May 22, 2017. The warrants are exercisable, at the option of the holder, at any time prior to their expiration. The fair value of warrants issued to placement agents was calculated utilizing the lattice method. The warrants issued to Ladenburg contain provisions that make them redeemable for cash by the holder of the warrant under certain circumstances that are not within the control of the Company. Accordingly, the fair market value of the warrants as of the date of issuance has been classified as liabilities. The fair value of the 2012 Private Placement warrants at March 31, 2013 was $6,626.

As part of the issuance of convertible debentures to Hillair as disclosed in Note 7, the Company issued warrants to Hillair. The warrants entitle Hillair to purchase up to 2,604,651 shares of Common Stock for $0.4488 per share, subject to adjustments upon certain events. The warrants may be exercised at any time on or after June 27, 2013 and expire on June 27, 2018. The fair value of warrants issued to Hillair was calculated utilizing the lattice method. The warrants issued to Hillair contain provisions that make them redeemable for cash by the holder of the warrant under certain circumstances that are not within the control of the Company. Accordingly, the fair market value of the warrants as of the date of issuance has been classified as liabilities and has been included as a debt discount of the convertible debentures described in Note 7. The fair value of the Hillair warrants as of March 31, 2013 was $130,423.

In connection, with the issuance of convertible debentures to Hillair, the Company issued warrants to Merriman. The warrants entitle Merriman to purchase up to 52,093 shares of Common Stock for $0.4488 per share and 52,093 shares of Common Stock at $0.43 per share. The fair market value of the warrants as of the date of issuance has been classified as equity and is recorded in deferred loan costs on the accompanying consolidated balance sheets. The fair value of the Merriman warrants as of the date of issuance was $8,166.

As part of the issuance of convertible debentures to Next View and Another Investor as disclosed in Note 7, the Company issued warrants to Next View and Another Investor. The warrants entitle Next View and Another Investor to purchase up to 651,163 and 260,465, respectively, shares of Common Stock for $0.4488 per share, subject to adjustments upon certain events. The warrants issued to Next View and Another Investor contain substantially all of the same terms as the warrants issued to Hillair. The fair market value of the warrants as of the date of issuance has been classified as liabilities and has been included as a debt discount of the convertible debentures described in Note 7. The fair value of the Next View and Another Investor warrants as of March 31, 2013 was $45,648.

In connection, with the issuance of convertible debentures to Next View and Investor, the Company issued warrants to Merriman. The warrants entitle Merriman to purchase up to 18,233 shares of Common Stock for $0.4488 per share and 18,233 shares of Common Stock at $0.43 per share. The fair market value of the warrants as of the date of issuance has been classified as equity and is recorded in deferred loan costs on the accompanying consolidated balance sheets. The fair value of the Merriman warrants as of the date of issuance was $2,858.

The change in fair value of the warrants of $156,692 and $10,446 is included in the accompanying condensed consolidated statements of operations for the three months ended March 31, 2013 and 2012, respectively.