Credit Facility	3 Months Ended
Oct. 31, 2012
Line of Credit Facility [Abstract]
Credit Facility	(11) Credit Facility We have a committed $100,000,000 secured revolving credit facility (the “Credit Facility”) with a syndicate of bank lenders, as amended on June 6, 2012. The Credit Facility expires on April 30, 2014 but may be extended by us to December 31, 2016, subject to certain conditions relating primarily to the repurchase, redemption or conversion of our 3.0% convertible senior notes and compliance with all other Credit Facility covenants. The Credit Facility provides for the extension of credit to us in the form of revolving loans, including letters of credit, at any time and from time to time during its term, in an aggregate principal amount at any time outstanding not to exceed $100,000,000 for both revolving loans and letters of credit, with sub-limits of $15,000,000 for commercial letters of credit and $35,000,000 for standby letters of credit. The Credit Facility may be used for acquisitions, equity securities repurchases, dividends, working capital and other general corporate purposes. At our election, borrowings under the Credit Facility will bear interest either at LIBOR plus an applicable margin or at the base rate plus an applicable margin, as amended. The interest rate margin over LIBOR ranges from 1.75 percent up to a maximum amount of 2.50 percent. The base rate is a fluctuating rate equal to the highest of (i) the Prime Rate; (ii) the Federal Funds Effective Rate from time to time plus 0.50 percent; and (iii) two hundred (200) basis points in excess of the floating rate of interest determined, on a daily basis, in accordance with the terms of the agreement. The interest rate margin over the base rate ranges from 0.75 percent up to a maximum amount of 1.50 percent. In both cases, the applicable interest rate margin is based on the ratio of our consolidated total indebtedness to our consolidated earnings before interest, taxes, depreciation and amortization (“Consolidated Adjusted EBITDA”). As defined in the Credit Facility, Consolidated Adjusted EBITDA is adjusted for certain items and, in the event of an acquisition with a purchase price in excess of $10,000,000, provides for the inclusion of the last twelve months of consolidated EBITDA of a target. The Credit Facility contains covenants, including covenants limiting certain debt, certain liens on assets, certain sales of assets and receivables, certain payments (including dividends), certain repurchases of equity securities, certain sale and leaseback transactions, certain guaranties and certain investments. The Credit Facility also contains financial condition covenants requiring that we (i) not exceed a maximum ratio of consolidated total indebtedness to Consolidated Adjusted EBITDA (each as defined in the Credit Facility); (ii) not exceed a maximum ratio of consolidated senior secured indebtedness to Consolidated Adjusted EBITDA (each as defined in the Credit Facility); (iii) maintain a minimum fixed charge ratio (as defined in the Credit Facility); (iv) maintain a minimum consolidated net worth; in each case measured on the last day of each fiscal quarter and (v) in the event total consolidated indebtedness (as defined in the Credit Facility) is less than $200,000,000, we maintain a minimum level of Consolidated Adjusted EBITDA (as defined in the Credit Facility). At October 31, 2012, we had $1,303,000 of standby letters of credit outstanding related to our guarantees of future performance on certain customer contracts and $54,000 of commercial letters of credit outstanding. At October 31, 2012, had borrowings been outstanding under the Credit Facility, the applicable interest rate margin above LIBOR and base rate borrowings would have been 2.50 percent and 1.50 percent, respectively. We are also subject to an undrawn line fee based on the ratio of our consolidated total indebtedness to our Consolidated Adjusted EBITDA, as defined and adjusted for certain items in the Credit Facility. Interest expense, including amortization of deferred financing costs, related to our credit facility recorded during the three months ended October 31, 2012 was $179,000, compared to $207,000 during the three months ended October 31, 2011. At October 31, 2012, based on our Consolidated Adjusted EBITDA (as defined in the Credit Facility) and our business outlook and related business plans, we believe we will be able to meet or obtain waivers for the applicable financial covenants that we are required to maintain.

(11) Credit Facility

We have a committed $100,000,000 secured revolving credit facility (the “Credit Facility”) with a syndicate of bank lenders, as amended on June 6, 2012. The Credit Facility expires on April 30, 2014 but may be extended by us to December 31, 2016, subject to certain conditions relating primarily to the repurchase, redemption or conversion of our 3.0% convertible senior notes and compliance with all other Credit Facility covenants.

The Credit Facility provides for the extension of credit to us in the form of revolving loans, including letters of credit, at any time and from time to time during its term, in an aggregate principal amount at any time outstanding not to exceed $100,000,000 for both revolving loans and letters of credit, with sub-limits of $15,000,000 for commercial letters of credit and $35,000,000 for standby letters of credit. The Credit Facility may be used for acquisitions, equity securities repurchases, dividends, working capital and other general corporate purposes.

At our election, borrowings under the Credit Facility will bear interest either at LIBOR plus an applicable margin or at the base rate plus an applicable margin, as amended. The interest rate margin over LIBOR ranges from 1.75 percent up to a maximum amount of 2.50 percent. The base rate is a fluctuating rate equal to the highest of (i) the Prime Rate; (ii) the Federal Funds Effective Rate from time to time plus 0.50 percent; and (iii) two hundred (200) basis points in excess of the floating rate of interest determined, on a daily basis, in accordance with the terms of the agreement. The interest rate margin over the base rate ranges from 0.75 percent up to a maximum amount of 1.50 percent. In both cases, the applicable interest rate margin is based on the ratio of our consolidated total indebtedness to our consolidated earnings before interest, taxes, depreciation and amortization (“Consolidated Adjusted EBITDA”). As defined in the Credit Facility, Consolidated Adjusted EBITDA is adjusted for certain items and, in the event of an acquisition with a purchase price in excess of $10,000,000, provides for the inclusion of the last twelve months of consolidated EBITDA of a target.

The Credit Facility contains covenants, including covenants limiting certain debt, certain liens on assets, certain sales of assets and receivables, certain payments (including dividends), certain repurchases of equity securities, certain sale and leaseback transactions, certain guaranties and certain investments. The Credit Facility also contains financial condition covenants requiring that we (i) not exceed a maximum ratio of consolidated total indebtedness to Consolidated Adjusted EBITDA (each as defined in the Credit Facility); (ii) not exceed a maximum ratio of consolidated senior secured indebtedness to Consolidated Adjusted EBITDA (each as defined in the Credit Facility); (iii) maintain a minimum fixed charge ratio (as defined in the Credit Facility); (iv) maintain a minimum consolidated net worth; in each case measured on the last day of each fiscal quarter and (v) in the event total consolidated indebtedness (as defined in the Credit Facility) is less than $200,000,000, we maintain a minimum level of Consolidated Adjusted EBITDA (as defined in the Credit Facility).

At October 31, 2012, we had $1,303,000 of standby letters of credit outstanding related to our guarantees of future performance on certain customer contracts and $54,000 of commercial letters of credit outstanding.

At October 31, 2012, had borrowings been outstanding under the Credit Facility, the applicable interest rate margin above LIBOR and base rate borrowings would have been 2.50 percent and 1.50 percent, respectively. We are also subject to an undrawn line fee based on the ratio of our consolidated total indebtedness to our Consolidated Adjusted EBITDA, as defined and adjusted for certain items in the Credit Facility. Interest expense, including amortization of deferred financing costs, related to our credit facility recorded during the three months ended October 31, 2012 was $179,000, compared to $207,000 during the three months ended October 31, 2011.

At October 31, 2012, based on our Consolidated Adjusted EBITDA (as defined in the Credit Facility) and our business outlook and related business plans, we believe we will be able to meet or obtain waivers for the applicable financial covenants that we are required to maintain.