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NOTE C - COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Tables)
6 Months Ended
Oct. 31, 2013
Contractors [Abstract]  
Costs and Estimated Earnings in Excess of Billings, Net [Table Text Block] At October 31, 2013 and April 30, 2013, costs and estimated earnings in excess of billings, net, consist of the following:

   
October 31, 2013
   
April 30, 2013
 
   
(In thousands)
 
Costs and estimated earnings in excess of billings
  $ 9,331     $ 10,228  
Billings in excess of costs and estimated earnings
    (3,913 )     (1,611 )
Net asset
  $ 5,418     $ 8,617