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Other Accrued Liabilities
 3 Months Ended
Oct. 31, 2012
Other Accrued Liabilities [Abstract]  
Other Accrued Liabilities
7.
Other Accrued Liabilities

   
October 31,
 2012
   
July 31,
2012
 
           
Allowance for contract adjustments
 
$
2,723,974
   
$
2,724,474
 
Other
   
1,105,699
     
1,208,114
 
                 
  
 
$
3,829,673
   
$
3,932,588
 
 
Included in other accrued liabilities is an allowance for contract adjustments relating to potential cost disallowances on amounts billed and collected in current and prior years' projects.  The allowance for contract adjustments is recorded for contract disputes and government audits when the amounts are estimatable.