v2.4.0.8

Equity (Summary of Warrants Outstanding) (Details) (Warrants [Member], USD $)					12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2010	Apr. 30, 2013 $0.00 - $0.20 [Member]	Apr. 30, 2013 $0.20 - $1.40 [Member]
Warrants Outstanding and Exercisable
Range of Exercise Prices, lower limit					$ 0.00	$ 0.20
Range of Exercise Prices, upper limit					$ 0.20	$ 1.40
Number	24,146,415	24,566,415	25,816,415	13,671,000	14,895,415	9,251,000
Weighted Average Exercise Price	$ 0.08	$ 0.11	$ 0.11	$ 0.32	$ 0.00	$ 0.21

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable upon exercise of equity instruments other than options.

+ References

No definition available.

+ Details

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable upon exercise of equity instruments other than options.

+ References

No definition available.

+ Details

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- Definition

Weighted average price at which grantees can acquire shares of stock.

+ References

No definition available.

+ Details

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Data Type:	num:perShareItemType
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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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