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Line of Credit
6 Months Ended
Jun. 30, 2014
Debt Disclosure [Abstract]  
Debt Disclosure [Text Block]
Note 5.
Line of Credit
 
The Company has a $9,000,000 renewable line of credit with the Bank of America (the “Bank”) that has been in place since June 2004. The Company’s earnings in 2013 were insufficient to satisfy the “profitability” covenant in the line of credit. The Bank waived this default on August 8, 2014 and the Company agreed to change the maturity date of the facility to December 31, 2014. The line of credit is drawn on from time to time as needed for equipment purchases and working capital. Amounts drawn against the line of credit are at an interest rate per year equal to the Bank’s prime rate minus 0.5 percentage point, or alternately, at the Company’s discretion, the LIBOR rate plus 1.0 percentage point, and are secured by the Company’s cash invested with the Bank. There have been no defaults in the payment of principal or interest. The weighted average interest rate during the first six months of 2014 was 1.44%. At June 30, 2014, $7,710,000 was borrowed against the line of credit, compared to $8,840,000 at December 31, 2013.