Credit Facility	9 Months Ended
Apr. 30, 2015
Line of Credit Facility [Abstract]
Credit Facility	Credit Facility We have an uncommitted $15,000,000 secured credit facility (the "Credit Facility") with one bank that provides for the extension of credit to us in the form of revolving loans, including letters of credit and standby 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 $15,000,000. Subject to covenant limitations, the Credit Facility may be used for working capital, capital expenditures and other general corporate purposes. The Credit Facility, which expires October 31, 2015, can be terminated by us or the bank at any time without penalty. At April 30, 2015, we had $3,233,000 of standby letters of credit outstanding related to our guarantees of future performance on certain customer contracts and no outstanding commercial letters of credit. Interest expense recorded during the three months ended April 30, 2014 was $157,000 (including amortization of deferred financing costs), all of which related to our $100,000,000 committed revolving credit facility that expired on October 31, 2014. There was no interest expense recorded during the three months ended April 30, 2015. During the nine months ended April 30, 2015 and 2014 interest expense was $198,000 and $510,000, respectively, all of which related to the expired revolving credit facility.

Credit Facility

9 Months Ended

Apr. 30, 2015

We have an uncommitted $15,000,000 secured credit facility (the "Credit Facility") with one bank that provides for the extension of credit to us in the form of revolving loans, including letters of credit and standby 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 $15,000,000. Subject to covenant limitations, the Credit Facility may be used for working capital, capital expenditures and other general corporate purposes. The Credit Facility, which expires October 31, 2015, can be terminated by us or the bank at any time without penalty. At April 30, 2015, we had $3,233,000 of standby letters of credit outstanding related to our guarantees of future performance on certain customer contracts and no outstanding commercial letters of credit.

Interest expense recorded during the three months ended April 30, 2014 was $157,000 (including amortization of deferred financing costs), all of which related to our $100,000,000 committed revolving credit facility that expired on October 31, 2014. There was no interest expense recorded during the three months ended April 30, 2015. During the nine months ended April 30, 2015 and 2014 interest expense was $198,000 and $510,000, respectively, all of which related to the expired revolving credit facility.