Line of credit	9 Months Ended
Sep. 30, 2011
Line of credit [Abstract]
Line of credit	8. Line of credit The Company has a line of credit agreement with a total availability of $10.0 million. The line is secured by the Company’s accounts receivable and inventory and bears interest at varying rates of interest, currently LIBOR plus 1.25%. The line of credit which was amended and renewed in June 2011, primarily to remove the borrowing base restriction, matures on June 30, 2013, and requires monthly payments of interest only. At September 30, 2011, there was no amount outstanding under the line of credit. There have been no borrowings under the line of credit to date. The Company’s agreement with the bank requires compliance 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 coverage charge ratio can be no less than 1.25:1, based upon a trailing twelve-month period. At September 30, 2011, the Company’s tangible net worth ratio was 0.25:1 and its fixed charge coverage ratio was 3.9:1. Accordingly, the Company was in compliance with those covenants.

Line of credit

9 Months Ended

Sep. 30, 2011

8. Line of credit

The Company has a line of credit agreement with a total availability of $10.0 million. The line is secured by the Company’s accounts receivable and inventory and bears interest at varying rates of interest, currently LIBOR plus 1.25%. The line of credit which was amended and renewed in June 2011, primarily to remove the borrowing base restriction, matures on June 30, 2013, and requires monthly payments of interest only. At September 30, 2011, there was no amount outstanding under the line of credit. There have been no borrowings under the line of credit to date. The Company’s agreement with the bank requires compliance 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 coverage charge ratio can be no less than 1.25:1, based upon a trailing twelve-month period. At September 30, 2011, the Company’s tangible net worth ratio was 0.25:1 and its fixed charge coverage ratio was 3.9:1. Accordingly, the Company was in compliance with those covenants.