SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) (USD $)					3 Months Ended				3 Months Ended
	Jul. 31, 2012	Apr. 30, 2012	Jul. 31, 2012 Customer Lists [Member]	Apr. 30, 2012 Customer Lists [Member]	Jul. 31, 2012 Customer Lists [Member] Maximum [Member]	Jul. 31, 2012 Customer Lists [Member] Minimum [Member]	Jul. 31, 2012 Contract Backlog [Member]	Apr. 30, 2012 Contract Backlog [Member]	Jul. 31, 2012 Contract Backlog [Member] Maximum [Member]	Jul. 31, 2012 Contract Backlog [Member] Minimum [Member]
Other intangible assets, Gross			$ 1,982,303	$ 2,961,799			$ 1,038,932	$ 1,034,787
Less accumulated amortization			(1,628,575)	(2,579,895)			(1,038,450)	(1,033,839)
Other intangible assets, Net	$ 354,210	$ 382,852	$ 353,728	$ 381,904			$ 482	$ 948
Estimated useful life (years)					9 years	3 years			3 years	1 year