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Other Accrued Liabilities
 3 Months Ended
Oct. 29, 2011
Other Accrued Liabilities [Abstract]  
Other Accrued Liabilities
   
October 29,
 2011
   
July 31,
2011
 
           
Allowance for contract adjustments
 
$
2,986,565
   
$
3,882,810
 
Other
   
1,651,031
     
2,256,613
 
                 
  
 
$
4,637,596
   
$
6,139,423
 
 
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.