6.	Long-term Debt

On June 28, 2013 we entered into a Loan and Security Agreement (Loan Agreement) with Oxford Finance LLC and Silicon Valley Bank (together, the “Lenders”), pursuant to which the Lenders funded an aggregate principal amount of $27.0 million (Term Loan), subject to the terms and conditions set forth in the loan agreement. The Term Loan accrues interest at a fixed rate of 9.75% per annum. Pursuant to the Loan Agreement, we are required to make interest only payments through July 1, 2014 and thereafter we are required to make payments of principal and accrued interest in equal monthly installments sufficient to amortize the Term Loan through July 1, 2017, the maturity date. However, if we achieve a specified revenue threshold for the period of 12 months from the date of the loan agreement through June 30, 2014, the interest only period will be extended to February 1, 2015. All unpaid principal and interest with respect to the Term Loan is due and payable in full on July 1, 2017. At maturity of the Term Loan, or the earlier repayment in full following a voluntary prepayment or upon acceleration, the Company is required to make a final payment fee in an aggregate amount equal to $1,620,000. In connection with the Term Loan, on June 28, 2013, we issued to the Lenders warrants to purchase up to an aggregate of 596,553 shares of our common stock at an exercise price of $2.26 per share. These warrants are immediately exercisable and will expire on June 28, 2020.

In connection with the funding of the Loan Agreement, we prepaid all outstanding amounts under the prior loan agreement, at which time the Company’s obligations under the prior loan agreement immediately terminated. The Company paid to the prior agent and the prior lenders approximately $18,866,000, consisting of the then outstanding principal balance due of approximately $17,325,000, accrued but unpaid interest of approximately $119,000, a final payment fee (net of fees waived or refunded by the Lenders under the new loan agreement) of approximately $1,078,000, a prepayment fee (net of fees waived or refunded by the Lenders under the new loan agreement) of approximately $312,000 and other customary lender fees and expenses.

The net proceeds of the Term Loan, after payment of lender fees and expenses and prepaying all the outstanding amounts relating to the prior loan agreement, were approximately $7.8 million.

For the continuing Lenders, we accounted for this amendment as a debt modification. Accordingly, related fees of $1,942,000 were recorded as debt discount, and along with the unamortized debt discount will be amortized as an adjustment of interest expense using the effective interest method. For one existing lender that did not participate in the Term Loan, the payoff of their loan was accounted for as debt extinguishment. Accordingly, a loss on debt extinguishment of $708,000 was recorded, which includes that lender’s portion of unamortized fees and discounts along with prepayment and final payment fees.

We allocated the aggregate proceeds of the Term Loan between the warrants and the debt obligations based on their relative fair values. The fair value of the warrants issued to the Lenders was calculated utilizing the Black-Scholes option pricing model. We are amortizing the resulting additional discount of $949,000 to interest expense over the term of the loan using the effective interest method. The overall effective interest rate for the Term Loan is 13.92%. The Term Loan are collateralized by the tangible assets of the company, including a security interest in substantially all of its existing and after-acquired assets.