SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) (USD $)					9 Months Ended				9 Months Ended
	Jan. 31, 2013	Apr. 30, 2012	Jan. 31, 2013 Customer Lists [Member]	Apr. 30, 2012 Customer Lists [Member]	Jan. 31, 2013 Customer Lists [Member] Maximum [Member]	Jan. 31, 2013 Customer Lists [Member] Minimum [Member]	Jan. 31, 2013 Contract Backlog [Member]	Apr. 30, 2012 Contract Backlog [Member]	Jan. 31, 2013 Contract Backlog [Member] Maximum [Member]	Jan. 31, 2013 Contract Backlog [Member] Minimum [Member]
Other intangible assets, Gross			$ 1,978,228	$ 2,961,799			$ 1,036,786	$ 1,034,787
Less accumulated amortization			(1,693,155)	(2,579,895)			(1,036,786)	(1,033,839)
Other intangible assets, Net	$ 285,073	$ 382,852	$ 285,073	$ 381,904			$ 0	$ 948
Estimated useful life (years)					9 years	3 years			3 years	1 year