GOODWILL AND INTANGIBLE ASSETS (Details 1) (USD $)							12 Months Ended
Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013 Customer Lists [Member]	Apr. 30, 2012 Customer Lists [Member]	Apr. 30, 2013 Contract backlog [Member]	Apr. 30, 2012 Contract backlog [Member]	Apr. 30, 2013 Maximum [Member] Customer Lists [Member]	Apr. 30, 2013 Maximum [Member] Contract backlog [Member]	Apr. 30, 2013 Minimum [Member] Customer Lists [Member]	Apr. 30, 2013 Minimum [Member] Contract backlog [Member]
Estimated useful life (years)							9 years	3 years	3 years	1 year
Other Finite-Lived Intangible Assets, Gross		$ 381,904	$ 1,975,527	$ 2,961,799	$ 1,035,364	$ 1,034,787
Less accumulated amortization			(1,724,895)	(2,579,895)	(1,035,364)	(1,033,839)
Other Intangible Assets, Net	$ 250,632	$ 382,852	$ 250,632	$ 381,904	$ 0	$ 948

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date of intangible assets not otherwise specified in the taxonomy having a reasonably expected period of economic benefit.

+ References

+ Details

Name:	us-gaap_OtherFiniteLivedIntangibleAssetsGross
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- Definition

The net carrying amount as of the balance sheet date of other indefinite-lived and finite-lived intangible assets that are not separately presented on the statement of financial position.

+ References

No definition available.

+ Details

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