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CONTRACTS IN PROCESS
 12 Months Ended
Apr. 30, 2012
CONTRACTS IN PROCESS [Abstract]  
CONTRACTS IN PROCESS
6. CONTRACTS IN PROCESS

The amounts by which total costs exceeded or were less than billings on uncompleted contracts are as follows (in thousands):
   April 30,
2012
    April 30,
2011
 
Costs incurred and estimated earnings recognized on uncompleted contracts
 
$
6,340
   
$
6,687
 
Billings on uncompleted contracts
   
(5,614
)
   
(6,886
)
   
$
726
   
$
(199
) 

The amounts shown in the table above are included in the associated balance sheet as follows:

   April 30,
2012
    April 30,
2011
 
Costs and estimated earnings in excess of billings on uncompleted contracts
 
$
726
   
$
32
 
Billings in excess of costs and estimated earnings on uncompleted contracts
   
-
     
(231
)
   
$
726
   
$
(199
)