COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS (Details) (USD $)	Jul. 31, 2014	Apr. 30, 2014
Costs incurred on uncompleted contracts	$ 17,822,248	$ 14,457,907
Estimated contract earnings	4,060,106	3,291,077
Gross Total	21,882,354	17,748,984
Less: Billings to date	22,528,858	18,766,199
Total	(646,504)	(1,017,215)
Costs and estimated earnings in excess of billings on uncompleted contracts	567,186	431,348
Billings in excess of cost and estimated earnings on uncompleted contracts	1,213,690	1,448,563
Total	$ (646,504)	$ (1,017,215)