5. Debt	12 Months Ended
Dec. 31, 2017
Notes to Financial Statements
5. Debt	The Company has a revolving credit facility with Silicon Valley Bank with a maximum borrowing availability of $1,000 and a maturity date of December 26, 2018. The Loan and Security Agreement governing the revolving credit facility contains customary borrowing terms and conditions, including the accuracy of representations and warranties, compliance with financial maintenance and restrictive covenants and the absence of events of default. Pursuant to the Loan and Security Agreement, the Company is permitted to pay cash dividends, the total of which may not exceed $5,000 in the aggregate during any twelve-month period, so long as an event of default does not exist at the time of such dividend and would not exist after giving effect to such dividend. The variable rate at which borrowings under the credit facility bear interest is the Wall Street Journal prime rate plus 25 basis points. The financial maintenance covenants, required to be maintained at all times and tested quarterly (or, for the “quick ratio” covenant, monthly, if any obligations are outstanding), include: (1) a ratio of “quick assets to current liabilities” minus “deferred revenue” (all as defined in the Loan and Security Agreement) of at least 1.25:1.00 and (2) “maximum total leverage” (as defined in the Loan and Security Agreement) of no greater total indebtedness than 3 times adjusted EBITDA. The Company’s obligations are collateralized by substantially all of the Company’s assets, principally accounts receivable and inventory. The Company was in compliance with all covenants under the Loan and Security Agreement as of December 31, 2017. The Company had no borrowings outstanding under the credit facility as of December 31, 2017, and $1,000 was available for borrowing.

5. Debt

12 Months Ended

Dec. 31, 2017

The Company has a revolving credit facility with Silicon Valley Bank with a maximum borrowing availability of $1,000 and a maturity date of December 26, 2018. The Loan and Security Agreement governing the revolving credit facility contains customary borrowing terms and conditions, including the accuracy of representations and warranties, compliance with financial maintenance and restrictive covenants and the absence of events of default. Pursuant to the Loan and Security Agreement, the Company is permitted to pay cash dividends, the total of which may not exceed $5,000 in the aggregate during any twelve-month period, so long as an event of default does not exist at the time of such dividend and would not exist after giving effect to such dividend. The variable rate at which borrowings under the credit facility bear interest is the Wall Street Journal prime rate plus 25 basis points.

The financial maintenance covenants, required to be maintained at all times and tested quarterly (or, for the “quick ratio” covenant, monthly, if any obligations are outstanding), include: (1) a ratio of “quick assets to current liabilities” minus “deferred revenue” (all as defined in the Loan and Security Agreement) of at least 1.25:1.00 and (2) “maximum total leverage” (as defined in the Loan and Security Agreement) of no greater total indebtedness than 3 times adjusted EBITDA. The Company’s obligations are collateralized by substantially all of the Company’s assets, principally accounts receivable and inventory.

The Company was in compliance with all covenants under the Loan and Security Agreement as of December 31, 2017. The Company had no borrowings outstanding under the credit facility as of December 31, 2017, and $1,000 was available for borrowing.