Line of Credit	9 Months Ended
Sep. 30, 2014
Debt Disclosure [Abstract]
Line of Credit	9. Line of credit The Company has a $10.0 million revolving line of credit with a domestic bank. As of September 30, 2014, the Company had letters of credit outstanding of approximately $47,000 under the facility. The line is secured by the Company’s accounts receivable and inventory, and bears interest at varying rates (currently LIBOR plus 1.5% to Prime). The line of credit matures on June 30, 2015, and requires monthly payments of interest only. At September 30, 2014 and December 31, 2013, there were no borrowings under the line of credit. The Company’s agreement with the bank requires it to comply with certain financial and other covenants including maintenance of minimum tangible net worth and a fixed charge coverage ratio. The ratio of total liabilities to tangible net worth can be no greater than 1:1, and the fixed charge coverage ratio, as defined in the line of credit, can be no less than 1.25:1, based upon a trailing twelve-month period. At September 30, 2014, the Company’s tangible net worth ratio was 0.40:1 and its fixed charge coverage ratio was 2.86:1, and accordingly, the Company was in compliance with these covenants.

Line of Credit

9 Months Ended

Sep. 30, 2014

9. Line of credit

The Company has a $10.0 million revolving line of credit with a domestic bank. As of September 30, 2014, the Company had letters of credit outstanding of approximately $47,000 under the facility. The line is secured by the Company’s accounts receivable and inventory, and bears interest at varying rates (currently LIBOR plus 1.5% to Prime). The line of credit matures on June 30, 2015, and requires monthly payments of interest only. At September 30, 2014 and December 31, 2013, there were no borrowings under the line of credit. The Company’s agreement with the bank requires it to comply with certain financial and other covenants including maintenance of minimum tangible net worth and a fixed charge coverage ratio. The ratio of total liabilities to tangible net worth can be no greater than 1:1, and the fixed charge coverage ratio, as defined in the line of credit, can be no less than 1.25:1, based upon a trailing twelve-month period. At September 30, 2014, the Company’s tangible net worth ratio was 0.40:1 and its fixed charge coverage ratio was 2.86:1, and accordingly, the Company was in compliance with these covenants.