COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS (Details) (USD $)	Oct. 31, 2013	Apr. 30, 2013
Costs incurred on uncompleted contracts	$ 50,890,087	$ 72,951,142
Provision for loss on uncompleted contracts	(11,972)	(23,376)
Estimated contract profit	1,928,749	2,391,027
Gross Total	52,806,864	75,318,793
Less: Billings to date	53,655,822	75,858,733
Totals	(848,958)	(539,940)
Costs and estimated earnings in excess of billings on uncompleted contracts	1,149,409	1,079,367
Billings in excess of cost and estimated earnings on uncompleted contracts	1,998,367	1,619,307
Totals	$ (848,958)	$ (539,940)