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NOTE C - COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Details) - Costs and Estimated Earnings in Excess of Billings, Net (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2013
Apr. 30, 2013
Costs and Estimated Earnings in Excess of Billings, Net [Abstract]    
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