8. Credit Facility

On November 21, 2014, we entered into a Credit Agreement (the “Credit Agreement”) and related agreements with Bank of America, N.A. acting as agent for lenders named therein, including Bank of America, N.A. and Silicon Valley Bank (the “Lenders”), for a secured credit facility in the form of a revolving line of credit in the initial amount of up to $46,500, with an option to increase the available amount to $86,500 upon the satisfaction of certain conditions (the “Revolving Line of Credit”) and a term loan of $3,500 (the “Term Loan” and together with the Revolving Line of Credit, the “Credit Facility”). We may use borrowings under the Credit Facility for general working capital and corporate purposes. In general, amounts borrowed under the Credit Facility are secured by a lien against all of our assets, with certain exclusions.

As of June 30, 2015 and December 31, 2014, $10,000 and $0, respectively, was outstanding under the Revolving Line of Credit. Amounts outstanding under the Revolving Line of Credit are classified within short-term debt in our condensed consolidated balance sheet as of June 30, 2015 as we expect to repay the outstanding debt in the next twelve-month period. The Revolving Line of Credit requires quarterly payments of interest and matures on November 21, 2018, but may be prepaid in whole or part at any time. Amounts borrowed under the Revolving Line of Credit and Term Loan will bear, at our election, a variable interest at LIBOR plus 2.5% - 3.5% or Lender’s Prime Rate plus 1.5% - 2.5% per year and we will pay a fee of 0.375% - 0.5% per year on any unused portion of the Revolving Line of Credit. As of June 30, 2015 and December 31, 2014, $3,063 and $3,500, respectively, was outstanding under the Term Loan. The Term Loan requires quarterly payments of interest and principal, amortizing fully over the four-year-term such that it is repaid in full on the maturity date of November 21, 2018, but may be prepaid in whole or part at any time. Repayment of amounts borrowed under the Credit Facility may be accelerated in the event that we are in violation of the representations, warranties and covenants made in the Credit Agreement, including certain financial covenants set forth therein, and under other specified default events including, but not limited to, non-payment or inability to pay debt, breach of cross default provisions, insolvency provisions, and change of control.

Principal payments due under our Term Loan through 2018 are as follows:

Period	Principal Payments
July 1, 2015 — December 31, 2015	$	438
January 1, 2016 — December 31, 2016	875
January 1, 2017 — December 31, 2017	875
January 1, 2018 — December 31, 2018	875

	$	3,063

We incurred debt issuance costs of $711. Debt issuance costs are amortized on a straight-line basis over the four year term of the Credit Facility. Amortization expense related to debt issuance costs are included in interest and other income (expense) in the accompanying condensed consolidated statements of operations for the three and six months ended June 30, 2015. Amortization and interest expense capitalized during the three and six months ended June 30, 2015 amounted to $170 and $246, respectively. Interest rates for our Credit Facility for the six months ended June 30, 2015 ranged from 2.73% to 3.28%.

Amortization expense for our debt issuance costs through 2018 is as follows:

Period	Amortization Expense
July 1, 2015 — December 31, 2015	$	89
January 1, 2016 — December 31, 2016	178
January 1, 2017 — December 31, 2017	178
January 1, 2018 — December 31, 2018	158

	$	603

We are subject to customary covenants, including a minimum quarterly consolidated leverage ratio, a maximum quarterly consolidated fixed charge coverage ratio, and monthly liquidity minimums. In August 2015, we amended our Credit Facility to primarily revise our financial covenants with an effective date of June 30, 2015 through the period ended September 30, 2015. We were in compliance with all such financial covenants as of June 30, 2015. We are also subject to certain non-financial covenants, and we were also in compliance with all such non-financial covenants as of June 30, 2015.

As of June 30, 2015 and December 31, 2014, the carrying amount reflected in the accompanying condensed consolidated balance sheets for the current portion of long-term debt and long-term debt approximates fair value (Level 2) based on the variable nature of the interest rates, lack of significant change to our credit risk, and the proximity to the issuance date.