Other Accrued Liabilities (Details) (USD $)	Oct. 31, 2012	Jul. 31, 2012
Other Accrued Liabilities [Abstract]
Allowance for contract adjustments	$ 2,723,974	$ 2,724,474
Other	1,105,699	1,208,114
Other Accrued Liabilities	$ 3,829,673	$ 3,932,588

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, and other costs not separately disclosed in the balance sheet that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered.

No definition available.

Name:	us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant