Line of Credit	3 Months Ended
Mar. 31, 2013
Line of Credit	9. Line of Credit On June 29, 2007, the Company entered into a Purchase and Sale Agreement/Security Agreement (the “Agreement”) with Amegy Bank National Association (“Amegy”), a national banking association. The Agreement provides the Company with an accounts receivable loan facility to provide a source of working capital with advances generally limited to 85% of submitted accounts receivable. Upon collection of an account receivable, the remaining fifteen percent is rebated to the Company less the Agreement’s fixed and variable discounts. The fixed discount equals 0.2% of the account receivable for the first 15 days the account receivable is outstanding plus an additional 0.2% for each additional 15 day period, up to 1.2% for receivables 76 to 90 days outstanding. The variable discount is calculated for each day that the amount advanced by Amegy is outstanding until repaid by collection of the account receivable and equals the prime rate plus 1.5% divided by 360 multiplied by the advance amount for each account receivable. The borrowing line under this facility is $1,000,000, reviewed as growth of business dictates. To secure the amounts due under the agreement, the Company granted Amegy a security interest in all of its assets owned as of the date of the agreement or thereafter acquired. The Company had $1,143,920 and $897,772 outstanding as of December 31, 2012 and March 31, 2013, respectively, under this facility. There is no expiration date to the agreement.

9. Line of Credit

On June 29, 2007, the Company entered into a Purchase and Sale Agreement/Security Agreement (the “Agreement”) with Amegy Bank National Association (“Amegy”), a national banking association. The Agreement provides the Company with an accounts receivable loan facility to provide a source of working capital with advances generally limited to 85% of submitted accounts receivable. Upon collection of an account receivable, the remaining fifteen percent is rebated to the Company less the Agreement’s fixed and variable discounts. The fixed discount equals 0.2% of the account receivable for the first 15 days the account receivable is outstanding plus an additional 0.2% for each additional 15 day period, up to 1.2% for receivables 76 to 90 days outstanding. The variable discount is calculated for each day that the amount advanced by Amegy is outstanding until repaid by collection of the account receivable and equals the prime rate plus 1.5% divided by 360 multiplied by the advance amount for each account receivable. The borrowing line under this facility is $1,000,000, reviewed as growth of business dictates. To secure the amounts due under the agreement, the Company granted Amegy a security interest in all of its assets owned as of the date of the agreement or thereafter acquired. The Company had $1,143,920 and $897,772 outstanding as of December 31, 2012 and March 31, 2013, respectively, under this facility. There is no expiration date to the agreement.