7. Credit Facility

We have entered into a Credit Agreement (the “Credit Agreement”) and related agreements, as amended, with Bank of America, N.A. acting as agent for lenders named therein, including Bank of America, N.A., Silicon Valley Bank, and Citizens Bank, N.A. (the “Lenders”), for a secured credit facility in the form of a revolving line of credit of up to $69,750 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 September 30, 2017 and December 31, 2016, $5,000 and $15,000, respectively, was outstanding under the Revolving Line of Credit. Amounts outstanding under the Revolving Line of Credit are classified within long-term debt in our condensed consolidated balance sheet as of September 30, 2017 as we do not 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 September 30, 2017 and December 31, 2016, $1,094 and $1,969, 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
October 1, 2017 — December 31, 2017	$	219
January 1, 2018 — December 31, 2018	875

	$	1,094

We are subject to customary financial and non-financial covenants, including a minimum quarterly consolidated leverage ratio, a maximum quarterly consolidated fixed charge coverage ratio, and monthly liquidity minimums. We were in compliance with all financial covenants as of September 30, 2017.

Debt issuance costs are amortized on a straight-line basis over the term of the Credit Facility. Amortization expense related to debt issuance costs are included in interest and other expense, net in the accompanying condensed consolidated statements of operations for the three and nine months ended September 30, 2017 and 2016. Amortization and interest expense capitalized during the three and nine months ended September 30, 2017 amounted to $159 and $585, respectively. Amortization and interest expense capitalized during the three and nine months ended September 30, 2016 amounted to $227 and $710, respectively Amortization and interest expense expensed during the three and nine months ended September 30, 2017 amounted to $36 and $144, respectively. Amortization and interest expense expensed during the three and nine months ended September 30, 2016 amounted to $86 and $182, respectively. The interest rate for our Credit Facility for the nine months ended September 30, 2017 ranged from 3.5% to 3.8%.

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

Period	Amortization Expense
October 1, 2017 — December 31, 2017	$	61
January 1, 2018 — December 31, 2018	217

	$	278

As of September 30, 2017 and December 31, 2016, 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 and lack of significant change to our credit risk.