Stock Compensation Information (Narrative) (Details) (USD $)	6 Months Ended
Oct. 31, 2012	Oct. 31, 2011
Stock Compensation Information [Abstract]
Pricing model expected dividend yield	0.00%
Forfeiture rate	20.00%
Total intrinsic value of awards exercised	$ 0	$ 26,614
Fair value of awards vested	400,000	600,000
Fair value of awards granted	$ 400,000	$ 1,000,000

ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumption

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Option Pricing Model Expected Dividend Yield

+ References

No definition available.

+ Details

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award Options Granted In Period Weighted Average Fair Value

+ References

No definition available.

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ 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 (d)(2)

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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ References

No definition available.

+ Details

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